Dragon Knight
* 
Fury swipes can tear Dragon knight down as it stacks infinitely.
Void Spirit
* Heroes with burst damage of their own won't be afraid to go toe to toe with Void Spirit, like 
Ursa, 
Lifestealer, or 
Axe.
Dragon Knight
* Because Exorcism's damage is not reduce by damage block abilities or items, Death Prophet can be very good against heroes who rely on armor to survive: Axe, 
Terrorblade, 
Morphling, 
Dragon Knight
Void Spirit
* 
Spirit Siphon and 
Exorcism can damage through his 
Resonant Pulse shields.
* 
Silence can prevent Void Spirit escape or contributing much in fights.
Dragon Knight
* 
Slardar can chase Dragon Knight down with 
Guardian Sprint and stun him with both 
Slithereen Crush and his passive 
Bash of the Deep. He can also use 
Corrosive Haze to whittle Dragon Knight's armor.
Void Spirit
* The brutal physical damage of Slithereen Crush and Bash of the Deep can quickly remove Void Spirit's shield and stun him for a while.
* Corrosive Haze provides vision of Void Spirit while he is running away and Guardian Sprint allows Slardar to quickly close the gap
Void Spirit
* Ember Spirit has much higher mobility in 
Fire Remnant than Void Spirit.
* Ember's 
Flame Guard is effective against Void Spirit's spells, as most of them deal magical damage.
* The root from 
Searing Chains prevents Void Spirit from using Dissimilate or Astral Step.
Void Spirit
* One hit with 
Jinada should be sufficient in removing Void Spirit's shield most of the time.
* 
Track negates much of Void Spirit's escape abilities by revealing his position and prevents him from rotating effectively.
Dragon Knight
* Lich's constant slows with 
Frost Blast and 
Chain Frost will slow Dragon Knight to a crawl, especially in a crowded teamfight.
Void Spirit
* 
Fiend's Grip and 
Nightmare are very useful to lock down Void Spirit.
* 
Brain Sap can be difficult for Void Spirit to deal with in the laning stage.
Dragon Knight
* 
Static Link saps Dragon Knight of his already low base damage, making him even more useless in a fight if he gets kited.
* 
Storm Surge makes Razor much faster than Dragon Knight, and hard to catch.
* 
Eye of the Storm melts Dragon Knight's armor and bypasses 
Black King Bar, his core item.
Dragon Knight
* Dragon Knight has no built-in disengage from 
Frost Arrows, and 
Marksmanship procs ignore base armor, bypassing Dragon Knight’s durability for the most part, making Drow one of the few heroes that can deal enough sustained damage to solo kill Dragon Knight.
* With 
Aghanim's Scepter, Frost Arrows also apply hypothermia stacks, reducing her target’s regen, which is especially potent against tanks like Dragon Knight. (A similar effect can also be achieved with an 
Eye of Skadi).
Void Spirit
* Queen of Pain can 
Blink to both escape and initiate onto Void Spirit.
* She is also a very common 
Orchid Malevolence carrier, which can prevent Void Spirit from contributing much in fights.
Dragon Knight
* Timbersaw's pure damage will kill Dragon Knight surprisingly fast, especially if he gets caught in a bad position while laning.
Void Spirit
* 
Lion's instant cast point shuts down his initiation and buys time for his allies to catch up.
* 
Void Spirit has to be cautious when fighting, as he has no protection against 
Finger of Death. If caught out in a stun, the high magic damage could end him quickly.
Void Spirit
* 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.
Dragon Knight
* 
Viscous Nasal Goo slows down Dragon Knight and lowers armor, locking him down and making him more vulnerable.
Void Spirit
* 
Doom is effective against every hero, and Void Spirit is no exception. Being unable to cast spells or items during fights for 16 seconds nullifies his impact entirely.
* Doom has a very versatile build and can consume creeps which has abilities that can stun or provide additional magic resistance.
* Doom's high strength gain and versatility in items can be effective against Void Spirit's magical damage.
Void Spirit
* Heroes that can purge his slow and disables are very difficult to go on and their team: 
Abaddon, 
Oracle.
Dragon Knight
* Heroes who rely strongly on melee physical damage will fare badly against Omniknight's Guardian Angel: 
Phantom Assassin, 
Juggernaut, Dragon Knight, 
Lycan, Ursa, 
Troll Warlord
Void Spirit
* Heroes that can purge his slow and disables are very difficult to go on and their team: Abaddon, Oracle.
Dragon Knight
* Heroes with long cooldowns on their abilities or ultimate will struggle against the relentless pressure provided by 
Fiend's Gate: Terrorblade, Dragon Knight, 
Omniknight.
Dragon Knight
* 
Elder Titan's 
Natural Order completely nullifies Dragon Knight's high armor.
Void Spirit
* Heroes with burst damage of their own won't be afraid to go toe to toe with Void Spirit, like Ursa, Lifestealer, or Axe.
Void Spirit
* Nukers who have set amounts of damage will really struggle against Lone Druid especially in True Form: 
Puck, Void Spirit, 
Mars.
Void Spirit
* Side lanes with disables will greatly reduce the likeliness Void Spirit will be willing to rotate: 
Sven, 
Tiny, 
Wraith King, 
Ogre Magi.
Void Spirit
* Special mention to 
Legion Commander, as she can lock down Void Spirit for a long amount of time without worrying too much about being killed by him during the 
Duel.
Dragon Knight
* Heroes with no mobility will take some good damage from Sand King's spells: Dragon Knight, 
Jakiro, 
Pugna, 
Earthshaker.
Void Spirit
* Heroes who can match Void Spirit's mobility (like the aforementioned 
Ember Spirit or 
Queen of Pain) or tank his spells (Dragon Knight or 
Centaur Warrunner) are very problematic for him.
Dragon Knight
* Heroes that lose a great amount of their tankiness and become easier to finish off: 
Bristleback, 
Spectre, Phantom Assassin, 
Enchantress, Dragon Knight.
* Once you have an Aghanim's Scepter, Shadow Demon instantly reaches a new power spike and becomes a counter for a variety of heroes that have strong passives.
* Heroes that lose a great amount of their tankiness and become easier to finish off: Bristleback, Spectre, Phantom Assassin, Enchantress, Dragon Knight.
* Heroes that lose a great amount of damage output and become less threatening: Phantom Assassin, Sven, 
Slark, 
Phantom Lancer.
* You can always stack camps and farm the scepter with Shadow Poison.
Void Spirit
* Side lanes with disables will greatly reduce the likeliness Void Spirit will be willing to rotate: Sven, Tiny, Wraith King, Ogre Magi.
Dragon Knight
* 
Shadow Fiend's 
Presence of the Dark Lord reduces Dragon Knight's armor considerably, and his strong base attacks are augmented by his 
Necromastery.
Void Spirit
* 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
Dragon Knight
* 
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.
Dragon Knight
* 
Huskar can burn down Dragon Knight's health quickly during the early to mid game, but is not as effective during the late game. However, 
Life Break remains a constant threat due to the slow and percentage-based damage.
Additional:
* Huskar can negate Dragon Knight's passive with multiple trades of Burning Spear.
Void Spirit
* Side lanes with disables will greatly reduce the likeliness Void Spirit will be willing to rotate: Sven, Tiny, Wraith King, Ogre Magi.
Dragon Knight
* Durable heroes relied a lot on their main passive effects and items' effects such as Bristleback, 
Underlord, Spectre and Dragon Knight can be disabled easily with 
Sharpshooter's break, reducing their potential in teamfights.
Dragon Knight
* In general, heroes that can slow down Dragon Knight's movement speed will do well against him. This includes 
Venomancer and others in addition to the heroes mentioned above.
Void Spirit
* 
Rupture will fully damage Void Spirit during his ultimate, removing his main escape mechanic during fights and his way to disrupt them heavily.
* 
Blood Rite will force Void Spirit to use Dissimilate or Astral Step or be silenced. In the latter's case, it can be dangerous when combined with Rupture.
Dragon Knight
* Heroes with high armor and durability can be exceptionally hard for Bloodseeker to bring down: Dragon Knight, Axe
Additional:
* Bloodseeker's physical damage is unlikely to kill Dragon Knight, and therefore rarely get a chance to recover the large amount of HP from 
Bloodrage.
Dragon Knight
* 
Arcane Orb's constant pure damage output is devastating to Dragon Knight.
* Dragon Knight's relatively low mana pool leads to heavy damage from 
Sanity's Eclipse, which also bypasses his armor.
Void Spirit
* Heroes who take a long time to become strong are in for a rough mid game, such as 
Outworld Destroyer, 
Magnus, 
Medusa, and 
Anti-Mage.
Void Spirit
* Meepo's 
Earthbind can easily lockdown Void Spirit.
* Meepo and his clones can easily burst Void Spirit's Resonant Pulse.
Void Spirit
* Void Spirit can dodge Earthbind with Dissimilate and Astral Step, giving him a good chance to escape. If he gets caught anyways, Resonant Pulse allows him to retaliate.
Dragon Knight
* 
Heartstopper Aura and 
Reaper's Scythe go right through Dragon Knight's armor.
Dragon Knight
* Enemies that possess high defenses through magic resistance, damage reduction, or high regeneration will make it difficult to whittle their health down to get to Reaper's Scythe's threshold. Such heroes include Bristleback (although only from behind), Spectre, Ursa, and Dragon Knight.
Dragon Knight
* Counterspell can helpful blocked off to Dragon Tail.
Additional:
* 
Counterspell makes Anti-Mage exceptionally resistant to Breathe Fire, Dragon Tail, Fireball (requires 
Aghanim's Shard) and Elder Dragon Form's attacks. Its active component also blocks and reflects Dragon Tail back at Dragon Knight.
* 
Mana Break drains Dragon Knight's small mana pool, although it won't affect Dragon Knight much if he is in his Elder Dragon Form.
Void Spirit
* Heroes who take a long time to become strong are in for a rough mid game, such as Outworld Destroyer, Magnus, Medusa, and Anti-Mage.
Dragon Knight
* The dragon's splash damage wears down his illusions.
* Early harassment with Breath of Fire hinders his farming.
* Fireball stops his pushes and allows for a defence.
Additional:
* Breathe Fire and 
Elder Dragon Form's splash damage takes out Phantom Lancer's illusions quickly.
* If Dragon Knight can Dragon Tail the real Phantom Lancer, he and his team can quickly kill him before he has a chance to escape.
Void Spirit
* Astral Step and Dissimilate makes a quick work of Phantom Lancer's illusions.
* Resonant Pulse helps clear illusions and protects Void Spirit from Phantom Lancer's physical damage and with the Aghanim's Scepter upgrade, it prevents Phantom Lancer from casting his abilities.
* Void's Spirit mobility makes it hard for him to chase down with Phantom Rush.
Void Spirit
* With Aghanim's Scepter, Broodmother will gain access to 
Spinner's Snare, which will allow her to create invisible lines on her webs from 
Spin Web that will root, deal damage over time, and reveal enemy heroes if they unwittingly step on them. This allows Broodmother to keep her allies alerted on heroes who rely on invisibility-themed and movement-themed abilities and items to surprise enemy heroes and disrupt ganking attempts of enemy heroes: Phantom Assassin, 
Nyx Assassin, 
Mirana, 
Bounty Hunter, 
Templar Assassin, 
Riki, 
Spirit Breaker, Anti-Mage, 
Tusk, Ursa, 
Nature's Prophet, 
Enigma, Void Spirit, Magnus etc.
Dragon Knight
* Breathe Fire will clear Broodmother's spiderites while significantly damaging her spiderlings and decreasing their damage output.
* Dragon Blood's added armor and regen mitigates the damage done by Broodmother and her spiders.
* Elder Dragon Form at level 2 and above applies splash damage to Dragon Knight's auto attacks.
Void Spirit
* Void Spirit's AoE damage can make short work of Broodmother's spiderlings
* Even if she is within the range of her spiderwebs from Spin Web Broodmother cannot escape Void Spirit's mobility.
* However, Spinner's Snare from Aghanim's Scepter can be very hazardous for Void Spirit, as it allows Broodmother to create invisible lines on her webs from Spin Web that will root Void Spirit, deal damage over time to him and reveal him if he unwittingly steps on them, disrupting Void Spirit's ganking or escaping attempts with Dissimilate and Astral Step while also alerting Broodmother on his attempts to ambush her and her allies.
Additional:
* Void Spirit's AoE damage can make short work of Broodmother's spiderlings
* Even if she is within the range of her spiderwebs from Spin Web Broodmother cannot escape Void Spirit's mobility.
* However, Spinner's Snare from Aghanim's Scepter can be very hazardous for Void Spirit, as it allows Broodmother to create invisible lines on her webs from Spin Web that will root Void Spirit, deal damage over time to him and reveal him if he unwittingly steps on them, disrupting Void Spirit's ganking or escaping attempts with Dissimilate and Astral Step while also alerting Broodmother on his attempts to ambush her and her allies.
Dragon Knight
* Heroes with strong area-of-effect damage can make quick work of Chen's converted creeps and at same time gain farm: Magnus, Jakiro, Shadow Fiend, 
Kunkka, 
Luna, Dragon Knight, Medusa, 
Alchemist.
Void Spirit
* Heroes that can easily bypass Chen's creeps to get to Chen: Riki, Tusk, 
Clinkz, 
Sniper, Slark, Phantom Assassin, Void Spirit, 
Storm Spirit, Ember Spirit, 
Earth Spirit, Spirit Breaker.
Dragon Knight
* Any hero who can survive Magnus's initiations and manfight him: Huskar, 
Faceless Void, 
Weaver, Abaddon, Troll Warlord, Alchemist, Dragon Knight, 
Night Stalker, 
Viper.
Void Spirit
* Heroes who take a long time to become strong are in for a rough mid game, such as Outworld Destroyer, Magnus, Medusa, and Anti-Mage.
Dragon Knight
* Dragon Knight's insanely high armor and splash damage can cause Lycan to struggle taking him down.
Void Spirit
* Heroes that can summon units will have their summons destroyed very quickly if badly micro-managed, like 
Chen, Lycan, and Phantom Lancer.
Dragon Knight
* Heroes that reduce the damage that Marci can deal during her ultimate, like 
Razor, 
Rubick, 
Bane, Dragon Knight and Underlord.
Void Spirit
* 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.
Void Spirit
* Void Spirit can greatly pressure Morphling's farm, which is very bad for a hero who needs a large amount of space.
* 
Waveform does not provide better mobility than Astral Step.
* If Morphling shifted all of his strength to agility, he can be bursted down by Void Spirit before he can react.
* Doing an Ethereal Blade combo on Void Spirit is incredibly difficult, as Dissimilate and Astral Step can allow him to escape or dodge the projectile.
Void Spirit
* Keeping Void Spirit inside 
Wukong's Command is a very tricky task, especially in the early and mid game. In addition, if Monkey King is in a bad position, a well placed Aether Remnant can easily pull him out of the ring.
* Getting stacks of 
Jingu Mastery can be difficult when attacking Void Spirit.
Void Spirit
* A good choice against Invoker, as it has some advantage with the help of abilities.
* With the Dissimilate, Voidspirit can evade Invoker's skills, going to another world where he does not receive damage. The same ability to run away or attack quickly.
* Astral Step moves quickly from point to point, which also reduces the Invoker's probability that he will hit him with skills and cause at least some damage.
Additional:
* A good choice against Invoker, as it has some advantage with the help of abilities.
* With the Dissimilate, Voidspirit can evade Invoker's skills, like 
Chaos Meteor or 
E.M.P., going to another world where he does not receive damage. The same ability to run away or attack quickly.
* Astral Step moves quickly from point to point, which also reduces the Invoker's probability that he will hit him with skills and cause at least some damage.
Dragon Knight
* Dragon Blood's armor bonus greatly reduces the damage dealt by Phantasm.
* Breathe Fire and Elder Dragon Form's splash damage quickly destroy illusions and reduces their damage output.
Dragon Knight
* Riki does little damage to Dragon Knight, as he relies only on physical damage with modest attack speed and lack of burst.
Dragon Knight
* If Silencer can't prevent Dragon Knight from using Elder Dragon Form, Silencer's spells aren't going to be that effective against him, as Dragon Knight relies on right-clicks and not spells.
* Dragon Blood's armor bonus and health regeneration allows Dragon Knight to stay in the lane against Glaives of Wisdom.
* Dragon Knight often builds Black King Bar, allowing him to remove Global Silence before engaging.
Dragon Knight
* Dragon Knight's heavy armor negates 
Vendetta's burst physical damage. His large HP pool also gives him a good chance of surviving Nyx Assassin's follow-up nuke damage.
Dragon Knight
* Spirit Breaker's slow attack speed and moderate damage do very little to harm Dragon Knight, even if ganked with 
Charge of Darkness.
Dragon Knight
* 
Death Ward does little damage against Dragon Knight's armor, and Dragon Knight's high health regeneration minimizes damage from 
Maledict.
Void Spirit
* Void Spirit deals entirely magical damage in the early game, ignoring her evasion from 
Windrun.
* A Void Spirit with fast reaction time can use Dissimilate or Astral Step to dodge 
Powershot.
Additional:
* Void Spirit deals entirely magical damage in the early game, ignoring her evasion from Windrun.
* A Void Spirit with fast reaction time can use Dissimilate or Astral Step to dodge Powershot.
Dragon Knight
* Dragon Knight can simply tank and destroy all Shadow Shaman's Serpent Wards.
Void Spirit
* Heroes with abilities that can lock down Terrorblade and prevent him from using Sunder: Bane, 
Batrider, Earthshaker, Elder Titan, Faceless Void, 
Invoker, Legion Commander, Mars, 
Primal Beast, Riki, 
Shadow Shaman, 
Silencer, 
Vengeful Spirit, Void Spirit.
Additional:
* Void Spirit's high mobility becomes a nuisance to Terrorblade.
* Void Spirit's arsenal of magic damage is effective against Terrorblade's low strength.
* Terrorblade has no disables to prevent Void Spirit from escaping.
Void Spirit
* Heroes with abilities that can close the gap can easily kill Muerta: Storm Spirit, Earth Spirit, Ember Spirit, Void Spirit, Lycan, 
Chaos Knight, Tusk.
Dragon Knight
* Durable heroes can stand against Tusk during 1v1: Axe, Dragon Knight, Night Stalker, Centaur Warrunner, Wraith King and more.
Dragon Knight
* Heroes whose attacks can affect multiple enemies at once will clear Naga Siren's illusions. Such heroes include Sven, Magnus, Dragon Knight, Luna, Medusa, Templar Assassin, 
Gyrocopter, 
Muerta.
Void Spirit
* Void Spirit is strong against heroes who cannot deal with his rotations due to his mobility. Such heroes include Spectre, Gyrocopter, Morphling, and Chen.
Dragon Knight
* Heroes that rely on physical damage are ineffective against Dragon Knight due to his high armor: Phantom Assassin,
Bloodseeker, Lifestealer, Troll Warlord, Sven
Dragon Knight
* Heroes with high armor and/or durability can handle Juggernaut's ultimate, such as Sven and Dragon Knight.
Void Spirit
* Heroes with either magical, physical or pure damage burst: Bane, Ember Spirit, 
Leshrac, 
Lina, Luna, Nyx Assassin, Phantom Assassin, 
Skywrath Mage, 
Tinker, Ursa, Void Spirit.
Dragon Knight
* Heroes that rely on physical damage are ineffective against Dragon Knight due to his high armor: Phantom Assassin,Bloodseeker, Lifestealer, Troll Warlord, Sven
Dragon Knight
* Heroes with high armor like Dragon Knight, or with abilities to cause attacks to miss like Phantom Assassin, Riki and Tinker will be hard to deal with, as Clinkz relies almost entirely on physical attacks.
Additional:
* The extra damage from 
Searing Arrows is largely blocked by Dragon Knight's armor.
* Clinkz has too low health to survive a gank.Getting stunned keeps him down long enough for a reaction.
* Breathe Fire reduces his damage, as he almost exclusively deals physical damage.
Dragon Knight
* Heroes that are hard to gank: Dragon Knight, Mars, Centaur Warrunner.
Void Spirit
* Heroes who take a long time to become strong are in for a rough mid game, such as Outworld Destroyer, Magnus, Medusa, and Anti-Mage.
Dragon Knight
* Heroes that relies on armor or other type of physical damage negation are easy for Gyrocopter to take down during the early game with his magical damage: Axe, Dragon Knight, Sven.
Void Spirit
* Void Spirit can easily dodge Gyrocopter's {Ability ID:Homing Missile|gyrocopter} with the help of Dissimilate.
* Void Spirit can partly dodge 
Call Down via Dissimilate or move out of its range with Astral Step.
* Gyrocopter has no escape abilities, which benefits Void Spirit's high mobility.
Dragon Knight
* Heroes that withstand damage like 
Timbersaw, Bristleback, Dragon Knight and others will have their durability largely reduced when hit by an Ice Blast due to the risk of shattering.
Additional:
* 
Cold Feet and 
Ice Vortex both hinder Dragon Knight's movement greatly during teamfights.
* 
Ice Blast ignores Dragon Knight's armor, disables his health regeneration, and kills him prematurely.
Void Spirit
* Dissimilate and Astral Step allow Void Spirit to quickly escape from Cold Feet.
* Void Spirit deals both magical and physical damage, which makes Ancient Apparition an easy target to ambush.
* If Void Spirit purchases Aghanim's Scepter, the silence provided by Resonant Pulse can disrupt Ancient Apparition during fights, as he is entirely reliant upon spells to contribute.
Dragon Knight
* Heroes who rely on burst physical damage are affected by Lucky Shot's disarm: Terrorblade, Sven, Clinkz, 
Windranger, Alchemist, Dragon Knight, Legion Commander
Void Spirit
* Heroes with considerable mobility can easily escape from a rolling Pangolier: Anti-Mage, Queen of Pain, Void Spirit, Storm Spirit, Ember Spirit, Earth Spirit, moreover, if a player is familiar with how Rolling Thunder works, they can adjust their movement to avoid it entirely and of course outplay the Pangolier player.
Void Spirit
* 
Refraction negates all of Void Spirit's burst damage.
* 
Meld quickly burns through Resonant Pulse.
Dragon Knight
* Despite the armor reduction from Meld, Templar Assassin's reliance on physical damage and medium attack speed is unlikely to harm Dragon Knight.
* Templar Assassin's Refraction charges also get quickly removed by the damage over time from Dragon Knight's ultimate.
Additional:
* The damage over time from Dragon Knight's Elder Dragon Form rapidly burns down Refraction, allowing him to attack her.
* Also, Breathe Fire reduces Templar Assassin's damage and Dragon Tail is a stun with a considerable duration, letting him and his team whittle her health down once her defenses wear off.
* Templar Assassin will struggle to kill Dragon Knight thanks to his high armor and health regen from Dragon Blood as she deals entirely physical damage.
Void Spirit
* Heroes with burst damage of their own won't be afraid to go toe to toe with Void Spirit, like Ursa, Lifestealer, or Axe.
Dragon Knight
* Heroes that rely on physical damage are ineffective against Dragon Knight due to his high armor: Phantom Assassin,Bloodseeker, Lifestealer, Troll Warlord, Sven
Void Spirit
* Side lanes with disables will greatly reduce the likeliness Void Spirit will be willing to rotate: Sven, Tiny, Wraith King, Ogre Magi.
Dragon Knight
* Heroes that rely on physical damage are ineffective against Dragon Knight due to his high armor: Phantom Assassin,Bloodseeker, Lifestealer, Troll Warlord, Sven
Dragon Knight
* In the early game, a Dragon Knight without
Black King Bar is basically defenseless against Viper.
Poison Attack and 
Nethertoxin.
Corrosive Skin reduces damage from Dragon Fire and inflicts damage to him.
Viper Strike disables Dragon Blood, negating his main survivability.
Viper Strike and 
Poison Attack can severely slow him down even with his Elder Dragon Form.
Poison Attack after the laning stage ends.
Corrosive Skin protects Viper from 
Breathe Fire and returns damage.
Viper Strike can disable 
Dragon Blood, Dragon's Knight main source of armor and health regeneration.
Poison Attack and 
Viper Strike, Viper can keep Dragon Knight permanently slowed even in 
Elder Dragon Form.
* Viper can harass Dragon Knight at any time with his
*
*
*
Additional:
* Dragon Knight is easily harassed by
*
*
* Between
Void Spirit
*
Poison Attack makes it hard for Void Spirit to lane against him.
Corrosive Skin reduces the magical damage from Void Spirit's spells.
*