Shadow Fiend
* 
Nethertoxin both Necromastery and Presence of the Dark Lord, reducing his damage massively.
* 
Corrosive Skin gives Viper bonus Magic Resistance against Shadowraze and Requiem of Souls.
* Viper can easily take advantage of Shadow Fiend's lack of escape and mobility spells with 
Viper Strike breaks and 
Poison Attack. Poison Attack also serves as a great way to harass Shadow Fiend.
Puck
* Viper wins on the central line of Puck, because he has a huge damage from the Poison Attack ability, which Puck is not able to constantly avoid using 
Phase Shift, which will give Viper an advantage in the possible damage inflicted on each other
* Puck takes more damage than it does due to the passive Corrosive Skin ability of the Viper, which makes it unprofitable for the Puck to fight against the Viper at an early stage of the game, when the Puck has a very small pool of health.
Additional:
* Viper wins on the central line of Puck, because he has a huge damage from the Poison Attack ability, which Puck is not able to constantly avoid using Phase Shift, which will give Viper an advantage in the possible damage inflicted on each other
* Puck takes more damage than it does due to the passive Corrosive Skin ability of the Viper, which makes it unprofitable for the Puck to fight against the Viper at an early stage of the game, when the Puck has a very small pool of health
Shadow Fiend
* Despite Jakiro's fragileness, he can easily harass Shadow Fiend with 
Dual Breath and 
Liquid Fire than Shadow Fiend can harass Jakiro with 
Shadowraze.
* Jakiro can easily cancel 
Requiem of Souls with 
Ice Path as Shadow Fiend is a very easy target while channeling it.
* 
Aghanim's Scepter upgraded 
Macropyre can deal pure damage-over-time and pierce spell immunity, which can discourage Shadow Fiend from even trying to initiate with Requiem of Souls.
Additional:
* Despite Jakiro's fragileness, he can easily harass Shadow Fiend with Dual Breath and Liquid Fire than Shadow Fiend can harass Jakiro with Shadowraze.
* Jakiro can easily cancel Requiem of Souls with Ice Path as Shadow Fiend is a very easy target while channeling it.
* Aghanim's Scepter upgraded Macropyre can deal pure damage-over-time and pierce spell immunity, which can discourage Shadow Fiend from even trying to initiate with Requiem of Souls.
Puck
* Jakiro has 3 damage over time spells, 2 of which are from debuffs on Puck (Dual Breath and Liquid Fire) and 1 affecting an entire area (Macropyre), making it easy for him to disable the Blink Dagger.
* Ice Path is also strong against Puck, as he can cast it towards Puck during Phase Shift, who then gets instantly stunned once Phase Shift ends.
Additional:
* Jakiro has 3 damage over time spells, 3 of which are from debuffs on Puck: Dual Breath, Liquid Fire and 
Liquid Frost from 
Aghanim's Shard from and 1 affecting an entire area (Macropyre), making it easy for him to disable the blink dagger.
* Ice Path is also strong against Puck, as he can cast it towards Puck during Phase Shift, who then gets instantly stunned once Phase Shift ends.
Shadow Fiend
* 
Shadow Fiend's Requiem of Souls allows Rubick to output enormous crowd damage and control to the enemy team.
* Requiem of Souls has an effective range of 1000. 
Rubick can steal the spell out of the fear range with any level of 
Arcane Supremacy learned.
* Requiem of Souls has a significant cast animation which allows Rubick to predict the steal timing, since Shadow Fiend usually positions at the center of battlefield.
* 
Telekinesis can lift a unit right on top of Rubick with no collision size, forcing the victim to absorb all damaging lines of Requiem of Souls from Rubick, possibly resulting in a one-shot kill.
* Note that Requiem of Souls from Rubick still uses the original 1.67 second channeling time.
* It is advised to build 
Blink Dagger to jump in and cast Requiem of Souls given the opportunity.
* The three 
Shadowraze (Far) abilities are decent for farming and extra damage output.
* Note that 
Shadowraze (Near), 
Shadowraze (Medium) and Shadowraze (Far) are considered three separated abilities, only one is stolen per spell steal cast.
* It could be troublesome to cast Shadowraze (Far) immediately for damage output immediately after stolen since it is hard to react and recognize which of the three is stolen.
* Shadow Fiend's right click damage together with his ability damage may hurt Rubick bad. Consider items like 
Ghost Scepter and 
Glimmer Cape, together with wards to avoid being picked up.
Puck
* All of Puck's abilities are good for Rubick to 
Spell Steal:
* Illusory Orb and Waning Rift are all great wave-clear abilities.
* If Rubick manages to steal Waning Rift, he can silence Puck, disabling all its abilities including Phase Shift, Puck's main survivability tool.
* Dream Coil is a powerful teamfight ultimate that leashes enemies and disables their movement.
* As an elusive hero who requires constant repositioning, Puck is greatly countered by its own ultimate as it disables all its mobile abilities and items (especially Blink Dagger), forcing it to either stay in the danger zone or latches and stuns for a long time.
* Although Phase Shift does not provide extra damage or lockdown on its own, it does grant Rubick invulnerability, and enables him to use Blink Dagger with full duration similar to Puck's escaping combos.
* Rubick can initiate on Puck relatively fast as Telekinesis only has a 0.15 second cast animation.
Additional:
* 
Illusory Orb and 
Waning Rift are all great wave-clear abilities.
* Waning Rift can silence 
Puck, disabling all her abilities including Phase Shift.
* 
Dream Coil is a powerful teamfight ultimate that leashes enemies and disables their movement.
* As an elusive hero who requires constant repositioning, Puck is greatly countered by her own ultimate as it disables all her mobile abilities and items (especially Blink Dagger), forcing Puck to either stay in the danger zone or latches and stuns for a long time.
* Although Phase Shift does not provide extra damage or lockdown on its own, it does grant Rubick invulnerability, and enables him to use Blink Dagger with full duration similar to Puck's escaping combos.
* Rubick can initiate on Puck relatively fast as Telekinesis only has a 0.15 second cast animation.
Shadow Fiend
* Doom has several disable abilities to choose from jungle creeps (e.g. 
War Stomp, 
Ensnare) to deal with Shadow Fiend who lacks escape abilities.
* When Doom combines creep abilities with 
Scorched Earth, 
Infernal Blade, and 
Doom, Shadow Fiend most likely will die as he cannot use Shadowraze and Requiem of Souls to protect himself, and also cannot even flee by using 
Shadow Blade or Blink Dagger.
* Although Shadow Fiend has a high physical damage output, Doom has a large health pool to survive it, meaning Doom's combo with high magical damage output will shutdown Shadow Fiend first.
* Doom usually buys 
Radiance to improve his damage, making his nuke combo more deadly to Shadow Fiend. The blind also prevents Shadow Fiend from landing his attacks often.
Puck
* Doom is generally tanky and has naturally high health, allowing him to survive Puck's onslaught in any stage of the game.
* His namesake ultimate Doom is one of the best solutions to counter Puck, as it will silence Puck for a lengthy duration. A Puck silenced for more than 3 seconds usually ends up dead.
* In addition, if Doom chooses the Level 25 talent Doom applies Mute, Puck will not be able to use items altogether, most especially Blink Dagger and 
Eul's Scepter of Divinity, making Doom a nightmare to deal with as Puck.
Shadow Fiend
* 
Berserker's Call and 
Counter Helix allow Axe to kill Shadow Fiend if he stands too close to a creep wave.
* 
Battle Hunger is can be strong against Shadow Fiend in the early game because Shadow Fiend's low attack damage makes it hard for him to get last hits if he has no mana. However, Shadowraze also makes it very easy for him to get last hits, so use with caution.
* 
Axe's naturally high strength and health regeneration will be enough to tank a lot of Shadow Fiend's damage in the early game.
Puck
* Axe, 
Bristleback, 
Centaur Warrunner, 
Spirit Breaker, 
Pudge, 
Huskar, 
Wraith King, 
Doom: These heroes are too tanky for Puck to burst down. Also, all of them have spells which can deal with and shut Puck down reliably.
Shadow Fiend
* 
Enfeeble can be used to decrease Shadow Fiend's already abysmal level one damage even further, preventing him from getting farm and 
Necromastery stacks.
* 
Brain Sap allows Bane to heavily harass Shadow Fiend, even through debuff immunity from 
Black King Bar.
* 
Nightmare allows Bane to set up some early ganks onto Shadow Fiend.
* 
Fiend's Grip enables Bane to completely take Shadow Fiend out of a fight and potentially even kill him, even through Black King Bar.
Additional:
* Enfeeble can be used to decrease Shadow Fiend's already abysmal level one damage even further, preventing him from getting farm and Necromastery stacks.
* Brain Sap allows Bane to heavily harass Shadow Fiend.
* Nightmare allows Bane to set up some early ganks onto Shadow Fiend.
* Fiend's Grip enables Bane to completely take Shadow Fiend out of a fight and potentially even kill him, even through Black King Bar.
Puck
* Heroes that depend on disrupting fights with ability combos or big ultimate abilities are vulnerable to the long stun of Fiend's Grip: 
Disruptor, 
Death Prophet, 
Enigma, 
Faceless Void, 
Invoker, 
Lich, 
Magnus, 
Mars, 
Medusa, 
Outworld Destroyer, 
Phoenix, Puck, 
Queen of Pain, Shadow Fiend, 
Treant Protector, 
Underlord, 
Winter Wyvern, 
Witch Doctor, 
Zeus.
Shadow Fiend
* 
Charge of Darkness allows Spirit Breaker to gank Shadow Fiend in the early game, preventing him from getting Necromastery stacks.
* 
Nether Strike and Charge of Darkness can be used to prevent Shadow Fiend from casting Requiem of Souls.
Puck
* Axe, Bristleback, Centaur Warrunner, Spirit Breaker, Pudge, Huskar, Wraith King, Doom: These heroes are too tanky for Puck to burst down. Also, all of them have spells which can deal with and shut Puck down reliably.
Shadow Fiend
* Large area-of-effect with delay or require channeling: Enigma, 
Crystal Maiden, Invoker, Shadow Fiend, 
Pugna, 
Keeper of the Light, 
Dawnbreaker.
Puck
* Illusory Orb is easy to reflect with Spiked Carapace, either stunning Puck and setting up an easy Impale or forcing a premature Phase Shift.
* Puck is an intelligence hero that tends to build intelligence items, making it vulnerable to Mana Burn.
* An ill-timed Phase Shift can easily set Puck up to be stunned by Impale.
* Puck's low base armor and below average agility gain mean it is always susceptible to Vendetta.
Additional:
* Nyx Assassin can take advantage of every one of Puck's weaknesses. His entire skill set is very effective in countering Puck.
* Because Illusory Orb is such a slow moving projectile, Nyx Assassin can simply walk into the orb and activate 
Spiked Carapace, stunning Puck and setting up an easy 
Impale. This can be circumvented by using Phase Shift while the orb is traveling, however, that means that Puck cannot use Phase Shift to dodge any other skill nor use it to safely blink away from a fight.
* Puck is an intelligence hero that likes to build intelligence items such as Eul's Scepter of Divinity, 
Scythe of Vyse, and 
Dagon. This makes 
Mind Flare that much more deadly against Puck.
* An ill-timed Phase Shift can turn into an easy setup for Impale.
Shadow Fiend
* Shadow Fiend's lack of mobility and low base health make him an easy target for early ganks.
Puck
* Heroes with spell immunity or pseudo-blinks which provide invulnerability: 
Lifestealer, 
Juggernaut, 
Omniknight, Huskar, and 
Tusk have spells which allow them to easily escape Dream Coil.
Shadow Fiend
* Shadow Fiend's fragility and lack of a natural escape mechanism makes him a great target for Templar Assassin's Meld.
* Shadow Fiend's burst damage, such as Shadowraze and Requiem of Souls, is easily nullified by her Refraction.
Puck
* None of Puck's abilities have any damage-over-time components, meaning that 
Refraction is a valuable form of defense against Puck's lane harassment.
* 
Psi Blades deals pure damage and spills over instantly. Puck cannot reliably dodge the damage with Phase Shift.
Additional:
* Puck high magical burst is almost completely useless against Refraction. Templar Assassin often buys 
Orchid Malevolence to render Puck useless in teamfights.
Puck
* Heroes that have disposable area-targeted spells can force her to undo her Meld: 
Leshrac, Puck, 
Tiny, 
Jakiro,. An experienced Templar Assassin could try to use Refraction before Meld so she can tank through those damage without getting her Blink disabled.
Shadow Fiend
* Heroes that can gank Shadow Fiend in the early game: 
Earth Spirit, 
Nyx Assassin, 
Riki, Spirit Breaker.
Puck
* Riki and Disruptor: 
Smoke Screen and 
Static Storm, respectively, can be thrown wherever Puck used Phase Shift, making Puck an easy target if it doesn't have Blink Dagger or is on cooldown. Puck is also very susceptible to Riki's high attack damage when attacking from the back. Glimpse also prevents Puck from escaping altogether.
Shadow Fiend
* Heroes with channeling spells because Shadow Fiend has nothing to cancel channeling outside of Requiem of Souls: 
Bane, Enigma, Pudge, 
Shadow Shaman, Dawnbreaker, 
Warlock, Crystal Maiden.
Puck
* Axe, Bristleback, Centaur Warrunner, Spirit Breaker, Pudge, Huskar, Wraith King, Doom: These heroes are too tanky for Puck to burst down. Also, all of them have spells which can deal with and shut Puck down reliably.
Puck
* Phase Shift is not an advantage against Arc Warden at all because Arc Warden can turn Puck's Phase Shift ability against him by using 
Spark Wraith, ensuring it to hit. To make this worse, Arc Warden can do it twice with his 
Tempest Double.
* 
Flux is also an instant spell (and therefore unavoidable) with a heavy slow and damage over time, which disables Blink Dagger for a certain period of time.
Puck
* Stone Form's long stun duration may prevent Puck from using escape abilities.
* Visage frequently builds 
Rod of Atos for the root that will make Puck unable to move and use his escape abilities. Alternatively, Visage can also build 
Bloodthorn to prevent Puck from using his escape abilities and make him more vulnerable to damage.
Puck
* Lone Druid has a huge reserve of health on the 
Summon Spirit Bear and a quick regeneration of his health with the help of 
Spirit Link, which makes the Puck's magical abilities useless, since they cannot break through such a large pool of health
* The ability of the Summon Spirit Bear and in the 
True Form of the Lone Druid 
Entangling Claws allows you to catch Puck when he released the Illusory Orb, since Puck will not be able to apply 
Ethereal Jaunt during the root action
Additional:
* Lone Druid has a huge reserve of health on the Summon Spirit Bear and a quick regeneration of his health with the help of Spirit Link, which makes Puck's magical abilities almost useless, since they cannot break through such a large pool of health.
* The ability of the Summon Spirit Bear and in the True Form of the Lone Druid, Entangling Claws, allows him to catch Puck when it releases the Illusory Orb, since Puck will not be able to apply Ethereal Jaunt during the root.
Puck
* Waning Rift's silence is almost completely worthless against Wraith King, due to him having only 1 active ability.
* Wraith King's only active ability, 
Wraithfire Blast, is strong against Puck if it hits, because it applies a damage over time on top of stunning and doing impact damage, disabling Puck for a while, and Blink Dagger for even longer. It is very important to avoid getting hit by this spell when playing against Wraith King.
* Even if Puck succeeds to burst down Wraith King, 
Reincarnation will ensure that Wraith King can fight back against him while leaving Puck exhausted and nearly unable to defend itself against Wraith King. And to make things worse, Puck is not a common 
Diffusal Blade nor 
Disperser wielder to counter this problem at all.
Shadow Fiend
* Bounty Hunter can absolutely destroy a Shadow Fiend's game by ganking his midlane with Shadow Walk, Jinada and Shuriken Toss.
* If his lane goes bad, a Shadow Fiend usually goes to the jungle. Follow him with Shadow Walk and take half of his experience.
* Due to its ministun, Shuriken Toss is a good way to interrupt Shadow Fiend's long cast animation on Requiem of Souls.
Additional:
* 
Shuriken Toss can be used to cancel Requiem of Souls.
* 
Shadow Walk and 
Jinada allow Bounty Hunter to gank Shadow Fiend early on
* 
Track prevents Shadow Fiend from escaping with Shadow Blade.
Shadow Fiend
* 
Glimpse and 
Kinetic Field allows Disruptor to set up some early kills onto Shadow Fiend.
* Static Storm can be used to cancel the cast of Requiem of Souls.
Puck
* Heroes who are strong against mobile heroes: Disruptor, 
Bloodseeker, 
Kunkka, Keeper of the Light.
Puck
* Puck with Phase Shift
* Heroes that can dodge Glimpse:
* Puck with Phase Shift
* Riki with 
Tricks of the Trade
* 
Phantom Lancer with 
Doppelganger
* 
Ember Spirit with 
Sleight of Fist and 
Activate Fire Remnant
* 
Chaos Knight with 
Phantasm
* 
Naga Siren with 
Mirror Image
* Tusk with 
Snowball
* Juggernaut with 
Omnislash
* 
Brewmaster with 
Primal Split
* Lifestealer with 
Infest
* Phoenix with 
Supernova
Shadow Fiend
* 
Kraken Shell dispels both Shadowraze's damage amplification stacks and Requiem of Soul's damage reduction (provided Tidehunter has taken enough damage).
* 
Ravage cancels Requiem of Souls if Shadow Fiend isn't protected by Black King Bar.
Additional:
* Kraken Shell dispels the damage amplification stacks of Shadowraze as well as the damage reduction from Requiem of Souls (provided he has taken enough damage).
* Anchor Smash reduces Shadow Fiend's large attack damage, Kraken Shell makes Tidehunter the last target Shadow Fiend wants to attack.
* Ravage can easily cancel Requiem of Souls if Shadow Fiend isn't protected by Black King Bar.
Shadow Fiend
* 
Static Link can steal Shadow Fiend's high physical damage output from Necromastery, lowering his damage output, and Static Link cannot be prevented by Black King Bar.
* 
Plasma Field and 
Eye of the Storm can melt down Shadow Fiend easily, due to his low health.
Shadow Fiend
* 
Lucent Beam and 
Eclipse with ministun talent can be used to cancel Requiem of Souls if Shadow Fiend does not have Black King Bar. Likewise, since Shadow Fiend is prone to buying Blink Dagger, an ill-timed Blink Dagger can give Luna a free chance to counter-initiate with Eclipse.
* 
Moon Glaives and 
Lunar Blessing allow Luna to outfarm Shadow Fiend in lane and the high physical damage output they provide her can also help her deal with Shadow Fiend even when he buys Black King Bar in late game.
* A well timed Eclipse will burst and kill Shadow Fiend before he even either initiates or gets a chance to retaliate, especially when equipped with Aghanim's Scepter and 
Ethereal Blade, this could become even worse for Shadow Fiend if he does not have Black King Bar. But bear in mind however, that smart and skilled Shadow Fiend can buy 
Wind Waker to counter this issue.
* Even though Shadow Fiend can evade all of Luna's abilities with Shadow Blade, smart Luna will always buy 
Dust of Appearance to provide vision on Shadow Fiend to her and her team.
Additional:
* Lucent Beam and Eclipse with ministun talent can be used to cancel Requiem of Souls if Shadow Fiend does not have Black King Bar. Likewise, since Shadow Fiend is prone to buying Blink Dagger, an ill-timed Blink Dagger can give Luna a free chance to counter-initiate with Eclipse.
* Moon Glaives and Lunar Blessing allow Luna to outfarm Shadow Fiend in lane and the high physical damage output they provide her can also help her deal with Shadow Fiend even when he buys Black King Bar in late game.
* A well timed Eclipse will burst and kill Shadow Fiend before he even either initiates or gets a chance to retaliate, especially when equipped with Aghanim's Scepter and Ethereal Blade, this could become even worse for Shadow Fiend if he does not have Black King Bar. But bear in mind however, that smart and skilled Shadow Fiend can buy Wind Waker to counter this issue.
* Even though Shadow Fiend can evade all of Luna's abilities with Shadow Blade, a smart Luna will always buy Dust of Appearance to provide vision on Shadow Fiend to her and her team.
Puck
* Puck cannot use spells if affected by Time Dilation, especially Phase Shift for main survivability as it effectively triples its cooldown.
* Chronosphere can end Puck's life quickly, as stun, more than 3 seconds will be a death sentence to Puck.
* If not silenced, Faceless Void can just Time Walk to undo Puck's Burst damage.
Additional:
* Hard lockdowns such as 
Chronosphere can be used to quickly take down Puck. Whenever Puck is disabled for longer than 3 seconds, he will usually end up dead.
* As the type of hero that spams spells, 
Time Dilation counters Puck very effectively. Phase Shift is Puck's main ability for survivability, and Time Dilation effectively triples its cooldown.
* If not silenced, Faceless Void can use 
Time Walk can easily undo the damage dealt by Illusory Orb, Dream Coil and Dagon.
Shadow Fiend
* Shadow Fiend, a normal Shadow Blade builder often relies on its invisibility to escape fights. Corrosive Haze reveals Shadow Fiend and also weakens his already low armor.
Puck
* Unless Puck is facing the direction he wants to blink while in Phase Shift, the 
Venomous Gale and 
Noxious Plague combo consistently ticks many times over several seconds, making it very difficult to use Blink Dagger towards the other direction. Puck's slow turning rate makes this even worse.
* Venomancer can use 
Plague Wards to reveal Puck's position before he even gets a chance to initiate.
Shadow Fiend
* Requiem of Souls is easily interrupted by Boundless Strike, due to its long cast time.
* Shadow Fiend's lack of mobility and escape makes him an easy target to ambush with Primal Spring, especially during laning stage.
* Being close means he cannot use all three razes on you before you get your Jingu Mastery stacks.
Puck
* Heroes with spell immunity or pseudo-blinks which provide invulnerability: Lifestealer, Juggernaut, Omniknight, Huskar, and Tusk have spells which allow them to easily escape Dream Coil.
Shadow Fiend
* Heroes with channeling spells because Shadow Fiend has nothing to cancel channeling outside of Requiem of Souls: Bane, Enigma, Pudge, Shadow Shaman, Dawnbreaker, Warlock, Crystal Maiden.
Shadow Fiend
* Heroes with channeling spells because Shadow Fiend has nothing to cancel channeling outside of Requiem of Souls: Bane, Enigma, Pudge, Shadow Shaman, Dawnbreaker, Warlock, Crystal Maiden.
Puck
* Enigma can be a perfect counter-initiator with his ultimate. A perfectly timed Black Hole will turn the tide of any initiation, especially from heroes like; Spirit Breaker, 
Legion Commander, Axe, Puck, and 
Slardar.
Puck
* Heroes who can clear the waves of Enigma's Eidolons: 
Lina, 
Luna, Dawnbreaker, Jakiro, Shadow Shaman, Death Prophet, Keeper of the Light, Invoker, Leshrac, Puck.
Puck
* Axe, Bristleback, Centaur Warrunner, Spirit Breaker, Pudge, Huskar, Wraith King, Doom: These heroes are too tanky for Puck to burst down. Also, all of them have spells which can deal with and shut Puck down reliably.
Puck
* Heroes who are strong against mobile heroes: Disruptor, Bloodseeker, Kunkka, Keeper of the Light.
Shadow Fiend
* Heroes that can gank Shadow Fiend in the early game: Earth Spirit, Nyx Assassin, Riki, Spirit Breaker.
Puck
* Earth Spirit Eliminates the possibility of the Puck to hide in Phase Shift and avoid an attack by 
Geomagnetic Grip with its AOE-silence, which is why it can help the team kill him
* Puck can't throw off the effect of 
Magnetize any of his abilities, which is why he will constantly receive damage if Earth Spirit extends this ability with his 
Stone Remnant
Additional:
* Earth Spirit eliminates the possibility of Puck to hide with Phase Shift and avoid an attack by Geomagnetic Grip with its AoE silence, which is why it can help the team kill it.
* Puck can't throw off the effects of Magnetize with any of its abilities, making it constantly receive damage if Earth Spirit extends this ability with his Stone Remnant.
Puck
* Puck can forbid the opportunity to avoid trouble for Earth Spirit on his own 
Rolling Boulder, using abilities: Dream Coil, Waning Rift
Additional:
* Puck can forbid the opportunity to avoid trouble for Earth Spirit on his own Rolling Boulder, using Dream Coil and Waning Rift.
Shadow Fiend
* Heroes that are hard to kill without lockdown: Puck, 
Weaver.
Shadow Fiend
* Heroes with channeling spells because Shadow Fiend has nothing to cancel channeling outside of Requiem of Souls: Bane, Enigma, Pudge, Shadow Shaman, Dawnbreaker, Warlock, Crystal Maiden.
Shadow Fiend
* Heroes with high burst damage: Lina, 
Lion, Luna, Nyx Assassin, Queen of Pain.
Puck
* Once you farm up an Orchid Malevolence or a Scythe of Vyse, you're suddenly a lot more fearsome to elusive heroes like 
Storm Spirit or even that pesky Puck.
Puck
* Any Hero with high mobility will be neutralized by dream coil: Queen of Pain, Storm Spirit, Ember Spirit, 
Lycan, Bloodseeker, 
Anti-Mage, 
Timbersaw.
Additional:
* Puck will make a game of dodging as many Shadow Strikes as he can with Phase Shift. If he's a good player, he will also dodge Sonic Wave. If he's a great player, he will also dodge Scream of Pain, and it's all thanks to this single spell.
* Puck also has a silence in Waning Rift to prevent Queen of Pain from blinking away.
* Puck can provide vision to hunt her down if she blinks into the trees with Illusory Orb.
* If Queen of Pain is under the effect of Dream Coil, she will be unable to blink out.
Shadow Fiend
* Heroes that have small health pools and little to no escape mechanisms are even easier prey for Necrophos. Ghost Shroud's slow will allow him to catch him with them, and get nuked down with his abilities, even preventing retaliation due to Reaper's Scythe's stun. Such heroes include Crystal Maiden, Witch Doctor, Warlock or Shadow Fiend.
Puck
* Axe, Bristleback, Centaur Warrunner, Spirit Breaker, Pudge, Huskar, Wraith King, Doom: These heroes are too tanky for Puck to burst down. Also, all of them have spells which can deal with and shut Puck down reliably.
Puck
* Axe, Bristleback, Centaur Warrunner, Spirit Breaker, Pudge, Huskar, Wraith King, Doom: These heroes are too tanky for Puck to burst down. Also, all of them have spells which can deal with and shut Puck down reliably.
Shadow Fiend
* The blind from 
Laser prevents Shadow Fiend from attacking for its duration, potentially preventing him from getting a kill.
* Scythe of Vyse can be used to prevent Shadow Fiend from casting Requiem of Souls.
* A combination of Tinker's abilities and his items (like the 
Dagon 5 and Ethereal Blade combo) can kill Shadow Fiend quickly.
Additional:
* During the laning stage Laser will reduce Shadow Fiend's last hits, preventing him from getting Necromastery souls.
* Shadow Fiend has low health and is vulnerable to Tinker's high magic burst.
Puck
* Low health spellcasters: Lina, Witch Doctor, 
Tinker, Keeper of the Light, all rely heavily on their spells and are fragile heroes. They all also have avoidable spells, allowing Puck to get to them and quickly burst them down.
Shadow Fiend
* 
Earthshock prevents Shadow Fiend from escaping after Ursa used his Blink Dagger to get on top of him.
* 
Overpower and 
Fury Swipes allow Ursa to quickly kill Shadow Fiend.
* 
Enrage keeps Ursa alive in a manfight with Shadow Fiend and allows him to stay close, even if Shadow Fiend uses Requiem of Souls.
Puck
* Melee heroes that get kited easily have hard times dealing with Puck without any lockdowns, as Puck is one of the most mobile heroes. Heroes like 
Sven, Lifestealer, 
Ursa and 
Alchemist may have problems to get to Puck without proper initiation items. They also lack reliable lockdowns, as their disables are easily avoidable for Puck, or are just a soft disable.
Puck
* A Lycan with 
Shapeshift can always run down Puck for a very quick kill due to its low armor. It is important to abuse as many cliffs and trees as possible to escape from a Lycan.
Puck
* Any Hero with high mobility will be neutralized by dream coil: Queen of Pain, Storm Spirit, Ember Spirit, Lycan, Bloodseeker, Anti-Mage, Timbersaw.
Shadow Fiend
* 
Arc Lightning allows Zeus to get farm in lane against Shadow Fiend without coming into the range of his Shadowrazes.
* 
Lightning Bolt can be used to heavily harass Shadow Fiend when he tries to get a last hit.
* 
Thundergod's Wrath and Lightning Bolt can be used to detect Shadow Fiend if he tries to escape with Shadow Blade.
Puck
* Heroes with long range abilities are also able to touch Zeus, such as 
Clockwerk, Kunkka, Puck, 
Skywrath Mage, Spirit Breaker, Tusk and others.
Shadow Fiend
* 
Dragon Tail can be used to cancel Requiem of Souls.
* 
Breathe Fire reduces Shadow Fiend's damage even further.
* 
Dragon Knight's high strength and 
Dragon Blood means that he'll be able to tank Shadow Fiend's right clicks.
Shadow Fiend
* Shadow Fiend's 
Presence of the Dark Lord reduces Dragon Knight's armor considerably, and his strong base attacks are augmented by his Necromastery.
Shadow Fiend
* Heroes with high burst damage: Lina, Lion, Luna, Nyx Assassin, Queen of Pain.
Puck
* Backline supports (Lion,Crystal Maiden) can keep Puck pinned long enough for a kill.
Puck
* Waning Rift silences and damages enemies affected by the ability, diminishing Lion's punishing powers.
* High burst damage potential plus mobility and disable through Illusory Orb, Waning Rift, and Dream Coil allows Puck to effortlessly chase, lock and/or kill Lion, as the Demon Witch lacks proper ways to avoid so.
* Phase Shift allows Puck to dodge 
Earth Spike, 
Finger of Death and breaks 
Mana Drain's link.
Shadow Fiend
* Wins on the central line, thanks to its strong nukes Shadowraze, because of which Void Spirit cannot approach the creeps to farm gold and overtake Shadow Fiend by level
Additional:
* Wins on the central line, thanks to its strong nukes Shadowraze, because of which Void Spirit cannot approach the creeps to farm gold and overtake Shadow Fiend by level
Puck
* Void Spirit can easily be bursted down by Puck's high magic damage spells in early game.
* Wanning Rift and Dream Coil prevent him from using two of his important mobility abilities: 
Dissimilate and 
Astral Step.
Additional:
* Dream Coil prevents the usage of Void Spirit's escape abilities and limits his damage output in fights almost entirely.
* Killing Puck in the late game becomes difficult when they obtain a Eul's Scepter of Divinity, Blink Dagger, and Phase Shift.
Shadow Fiend
* Shadow Fiend can easily farm his treants and get easy Necromastery Stacks.
* If Shadow Fiend buys 
Boots of Travel and Shadow Blade, he can counteract Nature's Prophet's split-push.
Puck
* Mass summoning heroes: 
Broodmother, 
Nature's Prophet and Enigma all have summons Puck can clear with Illusory Orb and Waning Rift instantly, due to their summons having low health.
Shadow Fiend
* Shadowraze (Near), Shadowraze (Medium), and Shadowraze (Far) can hit hard in the early stages of the game, and due to Shadow Fiend's high attack damage, most of Death Prophet's last hits will be denied in the laning phase. Additionally, Requiem of Souls can deal massive damage or kill Death Prophet at the start of team fights in combination with Eul's Scepter of Divinity or Shadow Blade.
Puck
* Heroes that can kill Death Prophet with nukes can prevent her from using Exorcism to its full duration or using it at all: Lina, Lion, Puck, 
Morphling.
Shadow Fiend
* Spiderlings are a good source of farm for Necromastery and can be quickly killed with Shadowraze.
* Shadow Fiend is a natural Black King Bar carrier, protecting him from any of Broodmother's abilities.
* Requiem of Souls combined with Eul's Scepter of Divinity can potentially kill Broodmother before she gets a Black King Bar.
Puck
* Mass summoning heroes: Broodmother, Nature's Prophet and Enigma all have summons Puck can clear with Illusory Orb and Waning Rift instantly, due to their summons having low health.
Shadow Fiend
* Shadowraze can easily remove the protection from Flame Guard and kill Ember Spirit due to his low health.
* Ember Spirit is very vulnerable to physical damage from Necromastery.
Puck
* Any Hero with high mobility will be neutralized by dream coil: Queen of Pain, Storm Spirit, Ember Spirit, Lycan, Bloodseeker, Anti-Mage, Timbersaw.
Shadow Fiend
* Shadow Fiend can still dish out heavy damage with Requiem of Souls and Shadowraze even while caught in 
Pit of Malice. Requiem of Souls is also great ability for intercepting Underlord and his team when they teleport using 
Fiend's Gate.
* Necromastery provides Shadow Fiend with bonus attack damage for each killed enemy unit, which combined with Presence of the Dark Lord's armor reduction allows him to 
Atrophy Aura's attack damage reduction in most stages of the game.
Puck
* Heroes with strong area-of-effect damaging and/or disabling abilities will be able to intercept Underlord and his team when they exit from Fiend's Gate: Luna's Aghanim's Scepter upgraded Eclipse, Dawnbreaker's 
Solar Guardian, Axe's Berserker's Call, Mars's 
Arena of Blood, Jakiro's Macropyre, Dual Breath and Ice Path, Naga Siren's 
Song of the Siren, 
Razor's Eye of the Storm and Plasma Field, Lina's 
Light Strike Array, Broodmother's 
Spinner's Snare from Aghanim's Scepter, 
Elder Titan's 
Earth Splitter and 
Echo Stomp, Alchemist's 
Unstable Concoction and 
Acid Spray, Queen of Pain's 
Sonic Wave, 
Dark Seer's 
Wall of Replica and 
Vacuum, 
Venomancer's Noxious Plague and 
Poison Nova from Aghanim's Scepter, 
Oracle's 
Fortune's End and 
Rain of Destiny from Aghanim's Shard, Bloodseeker's 
Blood Rite, Enigma's 
Black Hole and 
Midnight Pulse, Shadow Fiend's Requiem of Souls, 
Batrider's Aghanim's Scepter upgraded 
Flaming Lasso, 
Firefly, 
Flamebreak and 
Sticky Napalm, 
Ancient Apparition's 
Ice Blast, 
Sand King's 
Epicenter, 
Sand Storm and 
Burrowstrike, 
Gyrocopter's 
Call Down, Ember Spirit's Sleight of Fist, Death Prophet's 
Exorcism and 
Silence, 
Monkey King's 
Wukong's Command, Crystal Maiden's 
Freezing Field, 
Muerta's 
The Calling, Medusa's 
Stone Gaze, Zeus's 
Nimbus from Aghanim's Scepter. 
Dark Willow's 
Bramble Maze, 
Pangolier's 
Swashbuckle, 
Grimstroke's 
Soulbind, 
Ink Swell and 
Stroke of Fate, 
Earthshaker's 
Echo Slam and 
Fissure, Puck's Dream Coil and Waning Rift, Winter Wyvern's 
Winter's Curse, Magnus's 
Reverse Polarity.
Puck
* Heroes with blink or movement abilities, which are disabled by Pounce's leash: Anti-Mage, Earth Spirit, Faceless Void, Magnus, 
Mirana, Monkey King, Morphling, Pangolier, 
Phantom Assassin, Phoenix, Puck, Queen of Pain, Riki, Sand King, Spirit Breaker, Timbersaw, Tusk.
Shadow Fiend
* 
Shadow Dance does not protect Slark from Shadow Fiend's AoE spells.
Puck
* Illusory Orb and Phase Shift allows Puck to avoid most ganking attempts.
* Waning Rift and Dream Coil makes it very hard for Slark to escape bad situations.
* Puck's abilities used together also deals significant magical nuke damage, none of which are targeted and thus cannot be avoided by Shadow Dance.
Shadow Fiend
* Shadow Fiend's Requiem of Souls not only slow all Meepos, but it can also kill the weakest Meepo instantly if the ultimate is released at the right position and time.
Additional:
* Shadow Fiend can easily focus down and kill one of the Meepos.
* The amount of damage from Shadow Fiend's AoE spells makes Meepo vulnerable in every aspect.
Puck
* Heroes with powerful area-of-effect disables can initiate on Meepo and his clones and shut him down, such as Enigma, Invoker, Magnus, Puck, and Sand King.
Puck
* Illusory Orb and Waning Rift are effective nukes against Phantom Lancer's illusions, especially in the early game.
* Dream Coil limits Phantom Rush and Doppelganger's mobility during teamfights.
Shadow Fiend
* Shadowraze can clear waves of Chen's creeps while giving Shadow Fiend gold and damage for Necromastery.
* Requiem of Souls's very high magical damage can often kill Chen and his creeps or his allies before he can save them with 
Hand of God.
Puck
* Illusory Orb and Waning Rift provides great mobility, allowing Puck to catch up Pangolier when he is attempting to disengage with his own skills.
* Dream Coil's leash act almost as a literal silence to Pangolier, disabling half of his arsenal and also piercing his spell immunity during Rolling Thunder. Also Dream Coil's very long duration will make Pangolier wasting his entire ultimate rolling in place.
Additional:
* Dream Coil and Wanning Rift prevent Pangolier from using Swashbuckle and 
Rolling Thunder. If Puck has Aghanim's Scepter, Dream coil will stop Rolling Thunder from moving entirely.
Puck
* Puck can initiate on Mirana with Waning Rift to prevent her from going invisible or Leaping.
* A Mirana caught in Dream Coil will stun herself if she tries to Leap away.
* Puck's Burst damage takes advantage of Mirana's below average health.
* Puck can easily dodge Sacred Arrow and Starstorm with Phase Shift.
Additional:
* Mirana's spells are laid out to assassinate enemies. Puck can easily avoid the slow moving 
Sacred Arrow, and also can avoid 
Starstorm with Phase Shift, since the meteors have a delay.
* If Puck casts either Waning Rift or Dream Coil in the area, Mirana cannot 
Leap away.
Puck
* Phase Shift can easily disjoint Phantom Embrace and waste half of the Soulbind's duration.
* Puck is very mobile hero who can jump backsides and burst Grimstroke before he can cast anything.
Shadow Fiend
* Shadowraze deals magic damage and ignores Bulwark.
* Requiem of Souls deals magic damage and can fear Mars away, forcing him to turn around and therefore become vulnerable.
Puck
* Puck's area of effect nukes in the form of Illusory Orb and Waning Rift clears Phantasm illusions from the early game to mid game.
* Phase Shift can be used to disjoint Chaos Bolt.
Puck
* All of Puck's abilities are area-targeted, and will hit Dark Willow when she uses Shadow Realm.
* Illusory Orb allows Puck to bypass Bramble Maze, close the gap and silence Dark Willow with Waning Rift.
* Phase Shift helps Puck dodge attacks charged by Shadow Realm, and is easily timed against Terrorize's long cast time.
Puck
* Phase Shift allows Puck to effectively dodge 
Powershot, and even 
Shackleshot if timed correctly.
* Waning Rift prevents Windranger from casting all her abilities, most especially 
Windrun and 
Focus Fire .
* Windranger cannot escape with Windrun when she's affected by Dream Coil, as she will be instantly stunned when she tries to break away from the coil, allowing Puck's teammates to focus her down.
Puck
* Puck relies mainly on magical burst damage, which Phantom Assassin is most vulnerable against.
* Phase Shift and Illusory Orb disjoint Stifling Dagger, also allowing to kite Phantom Assassin.
* Dream Coil will stun Phantom Assassin if she uses 
Phantom Strike to blink away.
Puck
* Phase Shift allows Puck to dodge all of Earthshaker's abilites.
* Waning Rift disables Earthshaker's stuns, leaving him and his team vulnerable.
* Dream Coil takes a stun from Earthshaker if he tries to escape from Blink Dagger or Enchant Totem upgraded from Aghanim's Scepter.
Shadow Fiend
* Shadow Fiend usually buys a 
Hurricane Pike allowing him to easily escape from 
Power Cogs.
* Shadow Fiend can farm Clockwerk's Power Cogs to gain Necromastery stacks.
Puck
* Heroes with silencing abilities that are not blocked by Linken's Sphere, like Puck's Waning Rift, Death Prophet's Silence or 
Silencer's 
Global Silence.
Shadow Fiend
* Heroes with high physical and magical damage alike are a huge hazard for Muerta, as they can deal serious damage to her even if she has 
Pierce the Veil active: Luna, Lina, Tusk, Broodmother, Shadow Fiend, Ember Spirit, Gyrocopter, 
Vengeful Spirit, 
Arc Warden, Medusa, Shadow Shaman.
Puck
* Any Hero with high mobility will be neutralized by dream coil: Queen of Pain, Storm Spirit, Ember Spirit, Lycan, Bloodseeker, Anti-Mage, Timbersaw.
Puck
* Low health spellcasters: Lina, Witch Doctor, Tinker, Keeper of the Light, all rely heavily on their spells and are fragile heroes. They all also have avoidable spells, allowing Puck to get to them and quickly burst them down.
Puck
* Melee heroes that get kited easily have hard times dealing with Puck without any lockdowns, as Puck is one of the most mobile heroes. Heroes like Sven, Lifestealer, Ursa and Alchemist may have problems to get to Puck without proper initiation items. They also lack reliable lockdowns, as their disables are easily avoidable for Puck, or are just a soft disable.
Shadow Fiend
* Heroes with a low health pool (Crystal Maiden, Skywrath Mage etc)
Puck
* Puck silences Ogre Magi with Waning Rift, and Phase Shift makes Puck untargetable for the duration.
Puck
* Heroes that can reliably kite out Dispose, Unleash and dodge Rebound, like Ember Spirit, 
Void Spirit, Storm Spirit, Anti-Mage, Faceless Void, Puck or always build items like Blink Dagger and 
Force Staff.
Puck
* Heroes with spell immunity or pseudo-blinks which provide invulnerability: Lifestealer, Juggernaut, Omniknight, Huskar, and Tusk have spells which allow them to easily escape Dream Coil.
Shadow Fiend
* Heroes with high physical damage can damage Lifestealer more than he can heal: Bristleback, 
Clinkz, Luna,Shadow Fiend, Slardar, 
Terrorblade
Puck
* Melee heroes that get kited easily have hard times dealing with Puck without any lockdowns, as Puck is one of the most mobile heroes. Heroes like Sven, Lifestealer, Ursa and Alchemist may have problems to get to Puck without proper initiation items. They also lack reliable lockdowns, as their disables are easily avoidable for Puck, or are just a soft disable.
Shadow Fiend
* Heroes with long animations can be frequently interrupted with Cold Snap: Earthshaker, Monkey King, Shadow Fiend Lina
Puck
* Puck Outlanes Invoker with his abilities: Illusory Orb, Waning Rift finishing off all creeps on the line and getting a higher level than him
* Puck dodges Invoker's magic attacks with his abilities: Illusory Orb, Phase Shift in a fight, preventing Invoker from doing damage
Additional:
* Puck Outlanes Invoker with his abilities: Illusory Orb, Waning Rift finishing off all creeps on the line and getting a higher level than him
* Puck dodges Invoker's magic attacks with his abilities: Illusory Orb, Phase Shift in a fight, preventing Invoker from doing damage
Shadow Fiend
* Squishy core heroes (Shadow Fiend, 
Sniper, etc)
Puck
* Illusory Orb serves as a good scouting tool whenever Magnus is hiding in the trees, allowing Puck to warn its allies and disrupt his initiation attempts.
* Phase Shift allows Puck to dodge Shockwave when timed correctly.
* Even after Magnus successfully uses Reverse Polarity and Skewer Puck's teammates, Puck can usually counter-initiate using both Waning Rift and Dream Coil.
* Magnus cannot use Skewer when he is affected by Dream Coil, making him vulnerable to follow-up disables.
* Puck usually gets its own Blink Dagger as well, which makes it harder to lock down unless Magnus commits Reverse Polarity only for Puck.
Shadow Fiend
* Heroes with channeling spells because Shadow Fiend has nothing to cancel channeling outside of Requiem of Souls: Bane, Enigma, Pudge, Shadow Shaman, Dawnbreaker, Warlock, Crystal Maiden.
Puck
* Heroes with mobility spells like Queen of Pain, Anti-Mage, Phantom Assassin, Riki, Puck, and Spirit Breaker that are cancelled by Frostbite can suffer greatly from the presence of Crystal Maiden. It is absolutely critical, however, to have followup from teammates, as all of the above heroes can make quick work of the squishy Crystal Maiden after they are released from her grip.
Shadow Fiend
* Heroes with a low health pool (Crystal Maiden, Skywrath Mage etc)
Puck
* Puck has both Waning Rift and Dream Coil to stop Freezing Field's channel regardless of whether or not Crystal Maiden has a Glimmer Cape, as both spells fully affect invisible units.
Shadow Fiend
* Heroes who build mana boosting items but have low mana regeneration are especially vulnerable against Mana Break and Mana Void: Timbersaw, 
Slark, Shadow Fiend, Clinkz, Bristleback Nyx Assassin, Magnus
Puck
* Waning Rift silences Anti-Mage, preventing him from blinking away.
* However, Waning Rift can be dispelled by Manta Style.
* Dream Coil stops Anti-Mage from blinking, with Aghanim's Scepter also locks down Anti-Mage for long duration.
Shadow Fiend
* Heroes who depend on attacks (such as Shadow Fiend or 
Drow Ranger) can be nullified by Fire Spirits' attack speed slow.
Puck
* Although Phoenix has many ways to disable a Blink Dagger, the high cooldown of all of its spells makes them not as reliable for this. Also, its spells cost a lot of health to use, making it easy to get nuked down.
* Waning Rift prevents Phoenix from using Supernova to refresh itself, giving Puck's team time to finish it off, or allow Puck to burst Phoenix down.
* Dream Coil prevents Phoenix from using 
Icarus Dive without consequences. Waning Rift and Dream Coil are also able to cancel 
Sun Ray, which is its main source of damage in the late game.
Shadow Fiend
* Heroes with high physical damage output but lack of reliable escape mechanisms are always a good target for a solo gank: Sniper, Shadow Fiend, 
Troll Warlord, Drow Ranger. Those heroes, however, are dangerous if they manage to close the gap, so take caution.
Puck
* All of Puck's abilities are active making Demonic Purge break from Aghanim's Scepter useless.
* Shadow Demon will find a hard time catching a Puck, as he can get away with Illusory Orb or even Waning Rift;
* Puck can dodge Shadow Poison waves and potentially avoid the damage from Demonic Purge with Phase Shift. Furthermore, after Disruption ended, Puck can use Phase Shift to avoid any further danger and can blink away with Blink Dagger.
* Waning Rift can be used to initiate Shadow Demon, prevent him from using any spells.
Shadow Fiend
* The Reflection of Shadow Fiend cause Presence of the Dark Lord to affect Shadow Fiend, reducing his armor and making it easier for Terrorblade to kill him. Shadow Fiend also doesn't have lots of survivability or control abilities in order to escape.
* If Shadow Fiend chooses to go for a physical damage item build, he'll have a hard time against Terrorblade's high armor.
Puck
* All of Puck's damaging spells deal AoE magic damage, which focuses on Terrorblade's low health pool and ignores his armor.
* Puck's spells are also great at quickly clearing all of Terrorblade's illusions. Even a single Illusory Orb is enough to drop their health very low, allowing creeps, towers or allies to finish them off very quickly. Waning Rift and Illusory Orb together are usually enough to clear his illusions.
* Waning Rift prevents Terrorblade from casting 
Sunder at low health.
* Puck is a common Dagon carrier, making it possible to finish off Terrorblade before he has a chance to Sunder.
Shadow Fiend
* 
Shrapnel can be used to cancel Shadow Fiend's Blink Dagger from a huge range.
* 
Take Aim and 
Headshot allow Sniper to harass Shadow Fiend in lane without getting into the range of his Shadowrazes.
Additional:
* Shrapnel can be used to cancel Shadow Fiend's Blink Dagger from a huge range.
* Take Aim and Headshot allow Sniper to harass Shadow Fiend in lane without getting into the range of his Shadowraze.
* Assassinate when upgraded with Aghanim's Scepter can be used to cancel Shadow Fiend's Requiem of Souls.
Puck
* Sniper has no spells to disable Puck. He lacks a silence to prevent spell casting and a stun to disable, allowing Puck to act instantly against Sniper.
* Sniper's main strategy is to attack his enemies from a safe distance. Illusory Orb, combined with Blink Dagger makes it easy for Puck to get close to Sniper. Due to his low health, he is also easily nuked down by Puck.
* The status debuff placed by 
Assassinate on its target makes it very easy to avoid it. Puck has 2 (3 when having Blink Dagger, 4 when having Eul's Scepter of Divinity, 5 when having 
Linken's Sphere) methods to disjoint or dodge the projectile, making it a bad spell for finishing off Puck.
Puck
* Heroes who are strong against mobile heroes: Disruptor, Bloodseeker, Kunkka, Keeper of the Light.
Puck
* Heroes with silences: Puck, Doom, Riki.
Shadow Fiend
* Squishy heroes or heroes without hard disables or silences: 
Shadow Demon, Shadow Fiend, Venomancer, Ancient Apparition etc.
Puck
* Any Hero with high mobility will be neutralized by dream coil: Queen of Pain, Storm Spirit, Ember Spirit, Lycan, Bloodseeker, Anti-Mage, Timbersaw.
Shadow Fiend
* Decrepify prevents Shadow Fiend from attacking for its duration, potentially preventing him from getting a kill.
* Nether Ward can do heavy damage to Shadow Fiend if he tries to cast his Requiem of Souls and his Shadowraze.
Additional:
* 
Decrepify prevents Shadow Fiend from attacking for its duration, potentially preventing him from getting a kill.
* 
Nether Ward can do heavy damage to Shadow Fiend if he tries to cast his Requiem of Souls or spam Shadowraze.
Puck
* Puck can dodge 
Nether Blast and 
Life Drain with his Phase Shift, easily avoiding Pugna's strong burst magic damage.
* Waning Rift's silence allows Puck and its teammates to easily deal with Pugna, which cannot do the same to it, because with Puck it will be easy to avoid such an attack from the Decrepify.
* The Puck's combo: Waning Rift + Illusory Orb + Dream Coil doesn't have a huge amount of damage to feel the damage of the Pugna from Nether Ward, however, it may be quite enough to kill the Pugna solo at an early stage of the game with 
Witch Blade
Additional:
* Puck easily dodges the Nether Blast and the Pugna Life Drain with his Phase Shift, which is why he can easily avoid his strong magic damage
* The Puck's silence from the Waning Rift ability allows her team to easily cope with the Pugna, which cannot be said about the Pugna, because with the Puck it will be easy to avoid such an attack from the Decrepify
* The Puck's combo: Waning Rift + Illusory Orb + Dream Coil doesn't have a huge amount of damage to feel the damage of the Pugna from Nether Ward, however, it may be quite enough to kill the Pugna solo at an early stage of the game with Witch Blade
Puck
* Generally strong against lots of spellcaster-themed heroes, Puck fully relies on its skill set and cannot do almost anything when silenced.
* 
Arcane Curse disables Blink Dagger for quite some time, and is also effective against Puck as it tends to use its spells a lot.
* 
Glaives of Wisdom can do a lot of damage against Puck due to Puck's low agility gain and armor.
* 
Last Word can prevent Puck from getting a full combo off, limiting its effectiveness in team fights or ganks.
* Global Silence can take Puck out of fights entirely because of its long-duration silence.
Shadow Fiend
* Shadow Fiend is mostly played as right-click carry and natural Black King Bar carrier, making Silencer's spells very ineffective against him.
Puck
* Heroes with spell immunity or pseudo-blinks which provide invulnerability: Lifestealer, Juggernaut, Omniknight, Huskar, and Tusk have spells which allow them to easily escape Dream Coil.
Puck
* Heroes with escaping and disjointing abilities can be good against Juggernaut:Anti-Mage Riki, Queen of Pain, Puck, Storm Spirit, Ember Spirit, Slark etc.
Shadow Fiend
* Heroes with channeling spells because Shadow Fiend has nothing to cancel channeling outside of Requiem of Souls: Bane, Enigma, Pudge, Shadow Shaman, Dawnbreaker, Warlock, Crystal Maiden.
Additional:
* Because Shadow Fiend lacks escaping mechanisms, and is dependent on fair positioning for channeling Requiem of Souls, it's easier for Warlock with his long range crowd control abilities to lock Shadow Fiend down for his team.
Puck
* Because all of Warlock's abilities are active abilities, silences can make his impact in fights minimal. Be cautious of heroes that carry silences like Death Prophet, Puck, and the aforementioned Silencer.
Shadow Fiend
* Lina can outlanes Shadow Fiend on the central line, due to the fact that Lina's attack range exceeds the attack range of Shadow Fiend, which makes it difficult for him to fend off her attacks and approach creeps, thus Lina has more level and gold.
* Lina can defeat Shadow Fiend with the combination of her abilities on lane and during teamfights: Light Strike Array, 
Dragon Slave, 
Laguna Blade, Shadow Fiend does not have a large pool of health before buying items for extra strength and health like 
Satanic, which is why Lina's strong magic damage is enough to kill him quickly.
Additional:
* Outlanes Shadow Fiend on the central line, due to the fact that Lina's attack range exceeds the range of Shadow Fiend, which makes it difficult for him to fend off her attacks and approach creeps, thus Lina has more level and gold
* Defeats Shadow Fiend` from Burst with a combination of skills: Light Strike Array, Dragon Slave, Laguna Blade, Shadow Fiend does not have a large pool of health before buying an item: Satanic , which is why Lina's strong magic damage is enough to kill him quickly
Puck
* Puck can dodge Lina's Dragon Slave and Light Strike Array with his Phase Shift skill, which helps him avoid combining these abilities with Laguna Blade and avoid burst damage from Lina.
* Puck forbids Lina to use her abilities with the Waning Rift ability, which will help her teammates survive and even give them the opportunity to kill her.
Additional:
* Puck can dodge Lina's Dragon Slave and Light Strike Array with Phase Shift. A good Puck player can even dodge Laguna Blade, as it has an invisible projectile, therefore avoiding all the burst damage from Lina.
* Puck forbids Lina to use her abilities with Waning Rift, which will help Puck's teammates survive and even give them the opportunity to kill her.
Puck
* Heroes who are strong against mobile heroes: Disruptor, Bloodseeker, Kunkka, Keeper of the Light.
Puck
* Any Hero with high mobility will be neutralized by dream coil: Queen of Pain, Storm Spirit, Ember Spirit, Lycan, Bloodseeker, Anti-Mage, Timbersaw.
Shadow Fiend
* Late game heroes are Sven's favourite kind of opponent, such as Anti-Mage, 
Spectre and Shadow Fiend.
Puck
* Melee heroes that get kited easily have hard times dealing with Puck without any lockdowns, as Puck is one of the most mobile heroes. Heroes like Sven, Lifestealer, Ursa and Alchemist may have problems to get to Puck without proper initiation items. They also lack reliable lockdowns, as their disables are easily avoidable for Puck, or are just a soft disable.
Shadow Fiend
*
Void can be used to cancel Requiem of Souls.
Crippling Fear prevents Shadow Fiend from using Shadowraze or Requiem of Souls. 
Dark Ascension and 
Gem of True Sight, Night Stalker can find and kill Shadow Fiend easily. He is also a tanky hero that can fight Shadow Fiend at any stage of the game.
*
* With
Puck
* Puck cannot use any of its normal means to survive should Night Stalker catch it within Crippling Fear, and goes down quickly.
Void is a potent nuke that is devastating to Puck's low health pool.
Crippling Fear silence can prevent Puck from casting spells, leaving it vulnerable.
Additional:
*
*