Silencer
[wiki] rating: 2.0 (winrate: 52% pickrate: 15%)Tidehunter
[wiki] rating: 1.6 (winrate: 49% pickrate: 5%)Sand King
* 
Ravage, being an AoE disable, cancels Epicenter's channeling from a long range, limiting his potential to counter-initiate.
* This can be remedied, however, by first using a 
Black King Bar, then channel Epicenter, then finally initiate with 
Blink Dagger.
Medusa
* Other heroes who has armor and slow debuffs won't allow Medusa to disengage from combat: 
Tidehunter, 
Bristleback, 
Slardar.
Bristleback
[wiki] rating: 1.6 (winrate: 43% pickrate: 1%)Sand King
* Quill Spray will hit Sand King inside 
Sand Storm, damaging him and putting Sand King's Blink Dagger on cooldown, preventing him from escaping.
* 
Epicenter's numerous damage ticks will trigger Bristleback's passive repeatedly during teamfights.
Medusa
* Other heroes who has armor and slow debuffs won't allow Medusa to disengage from combat: Tidehunter, Bristleback, Slardar.
Riki
[wiki] rating: 1.0 (winrate: 54% pickrate: 13%)Medusa
* With 
Smoke Screen, Riki will silence and catch Medusa in a surprise with high miss chance flushing her from positions easily in team fights.
* He can deal a huge amount of damage through 
Cloak and Dagger, even through Mana Shield.
Anti-Mage
[wiki] rating: 1.0 (winrate: 53% pickrate: 11%)Medusa
* Anti-Mage easily destroys 
Mana Shield with Mana Break, especially once he has 
Manta Style.
* Anti-Mage effectively avoids 
Stone Gaze with Blink, and can reinitiate after its duration is over.
Additional:
* 
Mana Break burns Medusa's mana easily, especially when coupled with a Manta Style.
* Can easily initiate on Medusa with 
Blink, burning her mana or forcing her to use Stone Gaze.
* 
Mana Void is effective against Medusa's big mana pool and mana usage, presenting a huge hazard to Medusa's allies around her since her Mana Shield still gives her some protection if she has mana.
Arc Warden
[wiki] rating: 1.0 (winrate: 53% pickrate: 5%)Medusa
* He can use either his own or his double's 
Flux to bypass the spellblock from Linken's Sphere, using the leftover Flux + 
Spark Wraith to slow Medusa's already low move speed to a crawl.
* Arc Warden has a farming advantage with double 
Hand of Midas, and can generally bully Medusa with other items that benefit from duplication.
Razor
[wiki] rating: 1.0 (winrate: 52% pickrate: 7%)Medusa
* With 
Static Link, Razor can effectively make Medusa useless in teamfights by reducing her main damage output. It can, however, be blocked by a 
Linken's Sphere.
* 
Plasma Field allows Razor to get on top of Medusa, slowing her already slow movement speed to a mere crawl.
* 
Eye of the Storm capitilizes on Medusa's low armor and causes her to be very vulnerable, even through Mana Shield.
Phoenix
[wiki] rating: 1.0 (winrate: 50% pickrate: 5%)Sand King
* Sand King has nothing to deal with 
Supernova, as none of his spells are effective.
* The damage-over-time abilities of Phoenix disable Sand King's Blink Dagger very often.
Earth Spirit
[wiki] rating: 1.0 (winrate: 49% pickrate: 3%)Sand King
* 
Boulder Smash will push Sand King out of Sand Storm to reveal his position or an activated Epicenter off of Earth Spirit's allies, potentially wasting his combo
* 
Rolling Boulder and 
Geomagnetic Grip allow Earth Spirit to easily stun and silence Sand King and interrupt the channeling of Epicenter, completely ruining his initiation.
Bane
[wiki] rating: 1.0 (winrate: 48% pickrate: 2%)Medusa
* Fiend's Grip provides mana drain, which can heavily damage Mana Shield and prevent Medusa from using Stone Gaze.
* Even if she does use Stone Gaze, Nightmare can buy enough time to protect allies and reset the fight.
Additional:
* 
Fiend's Grip leaves Medusa defenseless, since not only does it deal damage, it also drains mana.
Invoker
[wiki] rating: 1.0 (winrate: 48% pickrate: 14%)Medusa
* EMP allows Invoker to burn Medusa's mana to weaken Mana Shield.
* Medusa's lack of mobility makes her easy to kite with Invoker's spells.
Additional:
* 
EMP is a large mana burn nuke which can hit Medusa's Mana shield with enough damage to lose even more mana.
* 
Deafening Blast disarms Medusa's ability to deal pseudo-AOE damage during teamfights.
* 
Cold Snap allows the opposing team to repeatedly stun Medusa in short succession, preventing her from successfully casting her ultimate due to its long cast time.
Kunkka
[wiki] rating: 1.0 (winrate: 47% pickrate: 3%)Sand King
* Ghostship helps your team soak up damage from Epicenter, especially if he initiates during the battle.
* 
Sand King can't dodge X Marks the Spot - Torrent combo by his abilities. Torrent drags him out of his Sand Storm
Rubick
[wiki] rating: 1.0 (winrate: 47% pickrate: 25%)Sand King
* Burrowstrike is one of the best and easiest steals for Rubick and Sand King should be careful when playing against him - it's much better to give away Sand Storm.
Lion
[wiki] rating: 1.0 (winrate: 45% pickrate: 10%)Medusa
* Medusa lacks mobility or escape mechanisms. Earth Spike and Hex can neutralize her strong damage potential and allow for Lion's team to focus her down.
* In addition to easily breaking her commonly bought Linken's Sphere with its low cooldown, Mana Drain can quickly drain her Mana Shield, making her far less tanky.
Spectre
[wiki] rating: 0.6 (winrate: 51% pickrate: 11%)Medusa
* Heroes that build 
Diffusal Blade or can fit it well into their item build will also make Medusa much less tanky: 
Riki, 
Naga Siren, 
Terrorblade, 
Juggernaut, 
Spectre, 
Slark,
Drow Ranger.
Slark
[wiki] rating: 0.6 (winrate: 51% pickrate: 17%)Sand King
* 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.
Medusa
* Medusa is especially vulnerable to 
Essence Shift, as both strength and intelligence contribute to her effective HP, while agility contributes to her damage.
* 
Dark Pact when timed right can be used to dispel Stone Gaze right after it petrifies Slark, allowing him to keep attacking Medusa throughout the duration.
Additional:
* Medusa cannot chase Slark in any way and has no disable beyond her ultimate, making her unable to stop him getting away and regenerating before coming back to finish her off.
* Essence Shift particularly removes 1 intelligence point per hit, thus lowering Medusa's mana pool's cap and leaving her much more vulnerable in prolonged fights.
Sand King
* He has a hard time killing Sand King because of the survivability he gets from Burrowstrike and Sand Storm.
* 
Shadow Dance, which usually allows Slark to survive fights, is ineffective against Sand King's AoE damage.
Drow Ranger
[wiki] rating: 0.6 (winrate: 51% pickrate: 18%)Medusa
* Heroes that build Diffusal Blade or can fit it well into their item build will also make Medusa much less tanky: Riki, Naga Siren, Terrorblade, Juggernaut, Spectre, Slark,Drow Ranger.
Juggernaut
[wiki] rating: 0.6 (winrate: 50% pickrate: 11%)Medusa
* Heroes that build Diffusal Blade or can fit it well into their item build will also make Medusa much less tanky: Riki, Naga Siren, Terrorblade, Juggernaut, Spectre, Slark,Drow Ranger.
Primal Beast
[wiki] rating: 0.6 (winrate: 49% pickrate: 9%)Medusa
* Hard carries who just want to farm and be left alone will not appreciate Primal Beast, heroes such as 
Medusa, Drow Ranger...
Keeper of the Light
[wiki] rating: 0.6 (winrate: 49% pickrate: 3%)Medusa
* Heroes with extremely slow movement speed will cripple against Solar Bind: Medusa, 
Viper
Additional:
* 
Will-O-Wisp will keep Medusa busy after she got hit by 
Blinding Light.
Void Spirit
[wiki] rating: 0.6 (winrate: 48% pickrate: 5%)Medusa
* 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.
Ursa
[wiki] rating: 0.4 (winrate: 52% pickrate: 15%)Medusa
* Ursa's status resistance from 
Enrage reduces duration of Medusa's Stone Gaze.
* Ursa can stack damage with 
Fury Swipes easily against her Mana Shield in a prolonged team match.
Additional:
* Medusa's tankiness doesn't help her very much against Fury Swipes in long teamfights.
* With no escape mechanism and a slow movement speed, getting jumped on by Ursa usually spells a quick end for Medusa in the early game.
Sand King
* Heroes that rely on slows to get kills: 
Lifestealer, 
Night Stalker, 
Ursa,...
Nyx Assassin
[wiki] rating: 0.4 (winrate: 50% pickrate: 4%)Medusa
* Level 4 
Mana Burn burns of Medusa's mana every 5 seconds if Medusa only increases her mana pool with intelligence. Additionally, 70% of the Mana Burn damage gets mitigated by Mana Shield, burning even more mana.
* Due to the passive nature of Mystic Snake and Split Shot, it can possibly proc Nyx's 
Spiked Carapace if he's within range of Medusa's abilities and isn't invisible.
* Medusa lacks single target damage, making Nyx with 
Aghanim's Scepter extremely hard to deal with if Medusa is the team's main damage source.
Additional:
* With her passive 
Split Shot, Medusa can be easily interrupted by Spiked Carapace during combat, especially during her precious Stone Gaze.
* Mana Burn quickly destroys Mana Shield, especially if Medusa only increases her mana pool by bolstering intelligence (which has the added bonus of increasing Mana Burn's damage).
* Uncontrollable damage from 
Mystic Snake and Split Shot can trigger Spiked Carapace.
* Medusa lacks single target damage, making a Burrowed Nyx Assassin hard to kill.
Sand King
* Heroes who rely on damage over time as Spiked Carapace can block and reflect only one instance of damage: 
Venomancer, 
Huskar, 
Ember Spirit, 
Dark Seer, Sand King, 
Doom, 
Dawnbreaker.
Zeus
[wiki] rating: 0.4 (winrate: 49% pickrate: 14%)Sand King
* 
Zeus usually stays at the back in teamfights and it is hard for Sand King to find Zeus and knock him down before Zeus deals his damage.
* All of Zeus' abilities, especially 
Thundergod's Wrath, disables Sand King's Blink Dagger, effectively reducing Sand King's initiation and counter-initiation potential.
* 
Lightning Bolt deals damage to Sand King in Sand Storm and reveals him. It also interrupts channeling of Epicenter.
Medusa
* Heroes with a lot of burst damage, especially those who rely on casting spells: 
Lina, Zeus.
Mars
[wiki] rating: 0.4 (winrate: 46% pickrate: 10%)Medusa
* 
Bulwark can make each of Medusa's attacks target him instead, reducing Medusa's contribution on team fights.
* 
Spear of Mars stuns Medusa and also pushes her away from teamfights, taking advantage of Medusa's low mobility.
* 
Arena Of Blood blocks Medusa's attacks from outside the arena.
Medusa
* Medusa's Stone Gaze forces Mars to choose between getting petrified, or turning his vulnerable back on Medusa.
Sniper
[wiki] rating: 0.4 (winrate: 44% pickrate: 11%)Medusa
* Sniper can outrange both Medusa's arrows and Stone Gaze, allowing him to focus her down during a teamfight.
Additional:
* Medusa is a fairly immobile hero that deals damage around her with Split Shot. Sniper should outrange her and should stay out of harm's way from Split Shot.
* More importantly, Sniper should have enough attack range to fire at Medusa during her Stone Gaze without turning to stone, so the ultimate is mostly wasted against him.
Sand King
* Sand King is a strong ganker, allowing him to shut down squishy heroes in the early game: Phantom Assassin, 
Clinkz, 
Sniper, 
Enchantress,...
Enchantress
[wiki] rating: -1.6 (winrate: 46% pickrate: 2%)Sand King
* Sand King is a strong ganker, allowing him to shut down squishy heroes in the early game: Phantom Assassin, Clinkz, Sniper, Enchantress,...
Medusa
* Enchantress often has a small army of neutral creeps, allowing Medusa to hit her with a later bounce of her Mystic Snake.
Phantom Assassin
[wiki] rating: -1.6 (winrate: 46% pickrate: 10%)Sand King
* Phantom Assassin relies on her 
Blur to stay alive, but is very vulnerable to Sand King's heavy magic damage.
* With Burrowstrike, Sand King can often catch Phantom Assassin before she can use her Black King Bar.
* Sand King can dodge 
Stifling Dagger with Sandstorm.
* Phantom Assassin has a hard time killing Sand King because of his high mobility.
Medusa
* Heroes with disables that ignore spell immunity will render Phantom Assassin quite useless in teamfights throughout the game: 
Axe, 
Enigma, 
Vengeful Spirit, Doom, 
Bane, 
Beastmaster, 
Pudge, Medusa.
Chen
[wiki] rating: -1.6 (winrate: 51% pickrate: 0%)Sand King
* 
Burrowstrike and Sand Storm will deal a large amount of damage to Chen's creeps.
* 
Caustic Finale will quickly clear Chen's creeps at low health.
Medusa
* 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.
Meepo
[wiki] rating: -1.6 (winrate: 56% pickrate: 1%)Sand King
* 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.
Additional:
* Burrowstrike can stun multiple Meepos, making them vulnerable targets.
* Epicenter and Sand Storm's AoE damage ensures all Meepo clones get damaged, making it hard for Meepo to choose which one to flee as all are taking damage at the same rate.
* Just be aware when using Sand Storm to escape, as Meepo has good AoE damage and disables, which, as explained in the "Bad Against" section, works well against an invisible Sand King.
Medusa
* Poof won't damage Medusa and she can use Stone Gaze to disable all of Meepo's clones.
* Mystic Snake will easily become the bane of Meepo early game.
Magnus
[wiki] rating: -1.2 (winrate: 51% pickrate: 15%)Sand King
* Any hero who can counter-initiate in anticipation without getting caught in Reverse Polarity: 
Sven, 
Omniknight, Enigma, Luna, Naga Siren, 
Mars, Jakiro, Venomancer, 
Elder Titan, Faceless Void, 
Rubick, 
Keeper of the Light, 
Pugna, Invoker, Spectre, Alchemist, 
Treant Protector, Lina, 
Oracle, Zeus, 
Shadow Shaman, Phoenix, 
Razor, Huskar, 
Batrider, Kunkka, Tidehunter, 
Wraith King, Sand King, Medusa, Dawnbreaker.
Medusa
* Any hero who can counter-initiate in anticipation without getting caught in Reverse Polarity: Sven, Omniknight, Enigma, Luna, Naga Siren, Mars, Jakiro, Venomancer, Elder Titan, Faceless Void, Rubick, Keeper of the Light, Pugna, Invoker, Spectre, Alchemist, Treant Protector, Lina, Oracle, Zeus, Shadow Shaman, Phoenix, Razor, Huskar, Batrider, Kunkka, Tidehunter, Wraith King, Sand King, Medusa, Dawnbreaker.
Nature's Prophet
[wiki] rating: -1.0 (winrate: 46% pickrate: 12%)Sand King
* Sand King's Caustic Finale combined with Sand Storm will kill Treants easily.
* Sand King can interrupt Teleportation with Burrowstrike, even through Sprout.
Additional:
* With Caustic Finale, Sand King can easily kill the treants from 
Nature's Call.
* Burrowstrike allows Sand King to prevent Nature's Prophet from using 
Teleportation inside of his 
Sprout.
Doom
[wiki] rating: -1.0 (winrate: 47% pickrate: 8%)Medusa
* Doom does not disable Mana Shield. As such, Doom's damage is largely mitigated by her mana shield. Additionally, Medusa is not reliant on her abilities to be effective during a teamfight, making Medusa an unproductive hero to target.
* Medusa is an ideal Linken's Sphere carrier. Should one be purchased, and without any additional disables, Doom may find that few opportunities exist to effectively lockdown, disable, and kill Medusa.
Chaos Knight
[wiki] rating: -1.0 (winrate: 47% pickrate: 3%)Sand King
* Sand King's massive area damage output, particularly Epicenter, allows him to quickly take down Chaos Knight and his illusions.
* Sand King can also apply Caustic Finale to illusions with attacks for extra damage when they die.
Pangolier
[wiki] rating: -1.0 (winrate: 48% pickrate: 9%)Medusa
* Split Shot will keep attacking Pangolier even when he is rolling around.
* Stone Gaze stuns Pangolier during Rolling Thunder, or forces him to roll away.
Templar Assassin
[wiki] rating: -1.0 (winrate: 48% pickrate: 4%)Sand King
* Sand King can quickly remove her 
Refraction with his Sand Storm.
* Once Refraction is down, she is very vulnerable to Epicenter's high magic damage.
Sven
[wiki] rating: -1.0 (winrate: 48% pickrate: 2%)Medusa
* Stone Gaze allows Medusa to easily kite and kill Sven.
* Mana Shield negates much of Sven's burst damage.
Additional:
* Mana Shield makes it very hard for Sven to burst her within Storm Hammer's stun duration.
* Stone Gaze makes it very difficult for Sven to manfight Medusa at any stage of the game.
* Mystic Snake can slow Sven down enough for allies to capitalise on his commitment in a fight.
Spirit Breaker
[wiki] rating: -1.0 (winrate: 48% pickrate: 9%)Medusa
* If Medusa activates Stone Gaze, the charge will inevitably fail.
* Mana Shield and overall tankiness allows Medusa to easily survive Spirit Breaker's initiation.
Lifestealer
[wiki] rating: -1.0 (winrate: 49% pickrate: 5%)Sand King
* Lifestealer's Rage negates Sand King's spells which do magical damage.
Sand King
* Heroes that rely on slows to get kills: Lifestealer, Night Stalker, Ursa,...
Medusa
* Lifestealer's low mobility makes him easy to kite.
* Stone Gaze pierces 
Rage, wasting its cooldown and making Lifestealer unable to fight.
Bloodseeker
[wiki] rating: -1.0 (winrate: 49% pickrate: 3%)Medusa
* Mana Shield makes it very difficult for Bloodseeker to gain his Thirst bonuses.
* Rupture rarely kills Medusa through Mana Shield.
Axe
[wiki] rating: -1.0 (winrate: 49% pickrate: 9%)Medusa
* Mana Shield reduces the effectiveness of Counter Helix.
* Stone Gaze makes it very difficult for Axe to initiate on Medusa and her allies.
Luna
[wiki] rating: -1.0 (winrate: 49% pickrate: 2%)Medusa
* Should Luna choose to buy Manta Style, Medusa will be able to kill illusions from them with Split Shot and 
Mjollnir, which is a common item on Medusa.
* Mystic Snake allows Medusa to easily harass Luna and steal mana from her, preventing Luna from retaliating with 
Lucent Beam.
* Medusa can survive 
Eclipse thanks to Mana Shield, and since Luna is not a hero that goes for Diffusal Blade, she will struggle greatly in bursting down Medusa.
* Even with Black King Bar, Medusa's Stone Gaze will still be able to disable Luna, which could even discourage her from counter-initiating with Eclipse.
* For the same reasons, Medusa makes a very powerful ally for Luna when they are in the same team.
Enigma
[wiki] rating: -1.0 (winrate: 50% pickrate: 3%)Medusa
* Medusa's Split Shot can make quick work of Enigma's Eidolons and take advantage of their considerable bounty.
* Medusa can also kill Eidolons with her Mystic Snake that can also greatly damage Enigma and drain some of his mana.
* If Medusa activates Stone Gaze at the start of a fight, it can make initiating — and landing an effective 
Black Hole exceedingly difficult, because Stone Gaze can cancel Enigma's Black Hole even through spell immunity, which can discourage Enigma from even trying to initiate with Black Hole.
Additional:
* Medusa's Split Shot can make quick work of Enigma's Eidolons and take advantage of their considerable bounty.
* If Medusa activates Stone Gaze at the start of a fight, it can make initiating — and landing an effective Black Hole exceedingly difficult.
* Stone Gaze can cancel Enigma's Black Hole even through spell immunity, which can discourage Enigma from initiating with Black Hole.
Necrophos
[wiki] rating: -1.0 (winrate: 50% pickrate: 7%)Medusa
* Mana Shield tanks most of the damage from Reaper's Scythe; with sufficient mana, the kill threshold drops significantly.
* Necrophos has a movement speed equal to Medusa, and is easy to chase down with a slowing item in Medusa's inventory.
Naga Siren
[wiki] rating: -1.0 (winrate: 51% pickrate: 3%)Medusa
* Heroes that build Diffusal Blade or can fit it well into their item build will also make Medusa much less tanky: Riki, Naga Siren, Terrorblade, Juggernaut, Spectre, Slark,Drow Ranger.
Sand King
* Since Naga Siren is not a hero that likes to go for Black King Bar, she is vulnerable to nukers with strong magical damage and big area-of-effect spells in every game more than any other carry heroes: Sand King, Jakiro, 
Leshrac, Lina, 
Earthshaker, Zeus.
Medusa
* Medusa's Split Shot will whittle down all of Naga Siren's illusions, including Naga Siren herself.
Legion Commander
[wiki] rating: -1.0 (winrate: 51% pickrate: 13%)Medusa
* Mana Shield makes Medusa very hard to take down in Duels.
* Stone Gaze stops Legion Commander from Dueling altogether, regardless of who she targets.
Undying
[wiki] rating: -1.0 (winrate: 52% pickrate: 10%)Medusa
* Split Shot can destroy Tombstone Zombies and Tombstone itself while still damaging heroes.
Visage
[wiki] rating: -1.0 (winrate: 55% pickrate: 2%)Medusa
* Visage's familiars are easy targets to Split Shot.
* Mana Shield will resist Soul Assumption instances without effort.
Lycan
[wiki] rating: -1.0 (winrate: 57% pickrate: 3%)Medusa
* Her Mana Shield is too tough for Lycan to break.
* Mystic Snake can hit for a massive damage once it spread between his summons.
Additional:
* Can be easily petrified despite his speed.
* Summoned wolves will be targeted by Split Shot or Mystic Snake
Dragon Knight
[wiki] rating: -0.6 (winrate: 45% pickrate: 5%)Sand King
* Heroes with no mobility will take some good damage from Sand King's spells: Dragon Knight, Jakiro, Pugna, Earthshaker,...
Lina
[wiki] rating: -0.6 (winrate: 50% pickrate: 16%)Medusa
* Heroes with a lot of burst damage, especially those who rely on casting spells: Lina, Zeus.
Jakiro
[wiki] rating: -0.6 (winrate: 51% pickrate: 12%)Sand King
* Heroes with no mobility will take some good damage from Sand King's spells: Dragon Knight, Jakiro, Pugna, Earthshaker,...
Beastmaster
[wiki] rating: -0.6 (winrate: 51% pickrate: 2%)Medusa
* Heroes with Linken's Sphere as core item: 
Weaver, Morphling, Medusa.
Earthshaker
[wiki] rating: -0.6 (winrate: 51% pickrate: 10%)Sand King
* Heroes with no mobility will take some good damage from Sand King's spells: Dragon Knight, Jakiro, Pugna, Earthshaker,...
Night Stalker
[wiki] rating: -0.6 (winrate: 52% pickrate: 4%)Sand King
* Heroes that rely on slows to get kills: Lifestealer, Night Stalker, Ursa,...
Clinkz
[wiki] rating: -0.6 (winrate: 52% pickrate: 7%)Sand King
* Sand King is a strong ganker, allowing him to shut down squishy heroes in the early game: Phantom Assassin, Clinkz, Sniper, Enchantress,...
Terrorblade
[wiki] rating: 0.0 (winrate: 45% pickrate: 2%)Medusa
* Heroes that build Diffusal Blade or can fit it well into their item build will also make Medusa much less tanky: Riki, Naga Siren, Terrorblade, Juggernaut, Spectre, Slark,Drow Ranger.
Sand King
* Because of his massive AoE damage, Sand King is very effective against illusion heroes: 
Chaos Knight, 
Phantom Lancer, Terrorblade,...
Pugna
[wiki] rating: 0.0 (winrate: 47% pickrate: 3%)Sand King
* Pugna's 
Nether Ward damages Sand King when he channels Epicenter, preventing him from using Blink Dagger afterward.
Sand King
* Heroes with no mobility will take some good damage from Sand King's spells: Dragon Knight, Jakiro, Pugna, Earthshaker,...
Phantom Lancer
[wiki] rating: 0.0 (winrate: 50% pickrate: 2%)Medusa
* Phantom Lancer with Diffusal Blade will very quickly burn Medusa's mana, making Mana Shield significantly less effective.
* 
Doppelganger's 1 second invulnerability can be used to dodge Medusa's petrification from Stone Gaze, as well as Mystic Snake.
* Phantom Lancer's illusions outnumber Medusa's targets from Split Shot, likely shielding his team in the process.
Sand King
* All of Sand King's abilities deal AoE damage.
* However, Epicenter is usually a non-issue against Doppelganger.
Slardar
[wiki] rating: 0.0 (winrate: 50% pickrate: 4%)Medusa
* Other heroes who has armor and slow debuffs won't allow Medusa to disengage from combat: Tidehunter, Bristleback, Slardar.
Medusa
* Medusa cares less than other heroes about armor reduction, since Mana Shield blocks 70% of all damage without taking armor/magic resistance into consideration. This makes 60% of your Corrosive Haze ineffective until Medusa's mana is drained.
Broodmother
[wiki] rating: 0.0 (winrate: 54% pickrate: 3%)Medusa
* Webbed areas can be used to hit and run, covering distance hastily weakening her on the way and initiating ganks.
* Even though Medusa can hunt down Spiderlings easily when given enough range, 
Silken Bola will cause her attacks to miss and get her swarmed in no time.
* Medusa usually does not build a Black King Bar to benefit from Mana Shield fully while Broodmother can fit a Diffusal Blade to burn away all of Medusa's mana.
Additional:
* 
Spin Web will allow Broodmother to pick her own fights and sometimes slip away to ambush Medusa.
* Though Medusa's Split Shot and Mystic Snake can help Medusa deal with Broodmother's spiderlings, Broodmother will create too much of them for her to handle, allowing her to outnumber Medusa's targets from Split Shot and shield her team in process.
Sand King
* Burrowstrike can be used as an escape or initiation against Broodmother.
* Sand Storm quickly kills any spiderlings caught inside if Sand King can manage to stun them.
Additional:
* Caustic Finale allows Sand King to easily kill Broodmother's Spiderlings throughout the game.
* Sand King can usually catch a split pushing Broodmother with Blink Dagger and Burrowstrike.
Sand King
* Both
Arcane Curse and 
Last Word punishes casters with spammable spells such as Sand King.
Intelligence Steal reduces Sand King's mana pool even more.
Global Silence silences Sand King, effectively reducing Sand King's initiation and counter-initiation potential. It can also interrupt channeling of Epicenter.
* As a strength caster,
*
Medusa
* Silencer burns easily through her effective HP from
Mana Shield, by taking away her intelligence.
Arcane Curse punishes her repeatedly casting 
Mystic Snake to keep her mana pool high. He can force her to use 
Manta Style before he has cast 
Global Silence and 
Medusa usually does not want to build 
Black King Bar.
*