Silencer
[wiki] rating: 2.0 (winrate: 52% pickrate: 15%)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.
Zeus
[wiki] rating: 1.0 (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.
Bloodseeker
[wiki] rating: 1.0 (winrate: 49% pickrate: 3%)Keeper of the Light
* 
Blood Rite makes Ezalor chose between getting off Illuminate or getting silenced for a while, as Illuminate is a channeled ability.
* Blood Rite's silence can completely take Ezalor out of a teamfight, as he relies on his abilities to be useful.
* Keeper of the Light's only mobility source, his high movement speed (via his high base movement speed and through spirit form), is entirely countered by 
Rupture.
Lifestealer
[wiki] rating: 1.0 (winrate: 49% pickrate: 5%)Sand King
* 
Lifestealer's Rage negates Sand King's spells which do magical damage.
Keeper of the Light
* 
Rage allows him to be immune to all of Ezalor's abilities. Also, the increased movement speed combined with the slow from 
Ghoul Frenzy and the squishy nature of Ezalor allows Lifestealer to take him down very quickly.
Sand King
* Heroes that rely on slows to get kills: Lifestealer, 
Night Stalker, 
Ursa,...
Tidehunter
[wiki] rating: 1.0 (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.
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.
Bristleback
[wiki] rating: 1.0 (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.
Riki
[wiki] rating: 0.6 (winrate: 54% pickrate: 13%)Keeper of the Light
* Heroes with silences: 
Puck, 
Doom, 
Riki.
Huskar
[wiki] rating: 0.6 (winrate: 53% pickrate: 6%)Keeper of the Light
* Vulnerable spellcasters with no escape mechanisms are easy targets for Huskar: 
Lich, 
Crystal Maiden, 
Silencer, 
Keeper of the Light, 
Venomancer, etc.
Dark Seer
[wiki] rating: 0.6 (winrate: 52% pickrate: 2%)Keeper of the Light
* Heroes with hastes: 
Dark Seer, 
Lycan
Oracle
[wiki] rating: 0.6 (winrate: 51% pickrate: 4%)Keeper of the Light
* Heroes with dispels: 
Legion Commander, 
Oracle, 
Slark, 
Phantom Lancer
Primal Beast
[wiki] rating: 0.6 (winrate: 49% pickrate: 9%)Keeper of the Light
* Any hero who lanes very poorly will struggle with Primal Beast's potential snowball in the very early levels, like Keeper of the Light, 
Luna, 
Templar Assassin...
Crystal Maiden
[wiki] rating: 0.6 (winrate: 49% pickrate: 13%)Keeper of the Light
* Heroes with channeling abilities: 
Enigma, 
Witch Doctor, Crystal Maiden.
Storm Spirit
[wiki] rating: 0.6 (winrate: 49% pickrate: 6%)Keeper of the Light
* Heroes with teleports to escape Solar Blind and Will-O-Wisp: 
Phantom Assassin, Puck, 
Queen of Pain, 
Storm Spirit
Puck
[wiki] rating: 0.6 (winrate: 48% pickrate: 9%)Keeper of the Light
* Heroes with silences: Puck, Doom, Riki.
Tiny
[wiki] rating: 0.6 (winrate: 48% pickrate: 13%)Keeper of the Light
* Squishy heroes, usually supports, like 
Lion, 
Ancient Apparition, Keeper of the Light etc can die quickly to Tiny's magic burst.
Witch Doctor
[wiki] rating: 0.6 (winrate: 48% pickrate: 15%)Keeper of the Light
* Heroes with channeling abilities: Enigma, Witch Doctor, Crystal Maiden.
Doom
[wiki] rating: 0.6 (winrate: 47% pickrate: 8%)Keeper of the Light
* Heroes with silences: Puck, Doom, Riki.
Queen of Pain
[wiki] rating: 0.6 (winrate: 46% pickrate: 6%)Keeper of the Light
* Heroes with teleports to escape Solar Blind and Will-O-Wisp: Phantom Assassin, Puck, Queen of Pain, Storm Spirit
Lion
[wiki] rating: 0.6 (winrate: 45% pickrate: 10%)Keeper of the Light
* Mana Drain is very effective against heroes that have mana burn abilities such as 
Anti-Mage, 
Nyx Assassin and Keeper of the Light.
Anti-Mage
[wiki] rating: 0.4 (winrate: 53% pickrate: 11%)Keeper of the Light
* Being an intelligence caster hero, Ezalor usually has a high mana pool and low health and armor, making him a prime target for 
Mana Void
* Ezalor's Illuminate damage and Solar Bind's magic resistance reduction are greatly reduced thanks to 
Counterspell. Counterspell can also block and reflect Solar Bind if timed properly.
* Anti-Mage usually is not hampered by Solar Bind or Will-O-Wisp thanks to 
Blink.
* However, despite all of this, if Keeper of the Light is played carefully and tops off his team's mana at all times, Anti Mage will not be able to get off a good Mana Void.
* By the same token once Keeper of the Light gets a 
Octarine Core, he can spam Charka Magic to keep his own mana full
Keeper of the Light
* Keeper of the Light can stall pushes with 
Illuminate. This makes him strong against pushing heroes: 
Terrorblade 
Naga siren 
Nature's Prophet and Anti-Mage
Night Stalker
[wiki] rating: 0.4 (winrate: 52% pickrate: 4%)Keeper of the Light
* 
Crippling Fear prevents Keeper of the Light from using his spells to keep his team alive during team-fights.
* 
Dark Ascension is very strong against Keeper of the Light, as it allows Night Stalker to jump the backline and quickly kill the squishy Ezalor, especially when combined with the slow from 
Void.
Additional:
* Keeper of the Light's 
Aghanim's Scepter upgrade loses much of its power, due to Night Stalker being able to reduce the duration of daytime by a lot.
Sand King
* Heroes that rely on slows to get kills: Lifestealer, Night Stalker, Ursa,...
Legion Commander
[wiki] rating: 0.4 (winrate: 51% pickrate: 13%)Keeper of the Light
* 
Press the Attack can dispel Blinding Light or Solar Bind from a hero.
* 
Duel can be used to instantly take Keeper of the Light out of a team-fight.
Keeper of the Light
* Heroes with abilities that blind or cause Legion Commander to miss will prevent her from winning Duels: 
Arc Warden, Keeper of the Light, Riki, 
Tinker
Nyx Assassin
[wiki] rating: 0.4 (winrate: 50% pickrate: 4%)Keeper of the Light
* 
Spiked Carapace can be used to reflect Illuminate damage and stun Keeper of the Light.
* 
Vendetta allows Nyx Assassin to follow Keeper of the Light around if he tries to split-push.
* Keeper of the Light is very squishy and will very quickly die to Vendetta and it's followup abilities.
* However, 
Mana Burn's Mana Burn can be more or less mitigated with Chakra Magic.
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.
Juggernaut
[wiki] rating: 0.4 (winrate: 50% pickrate: 11%)Keeper of the Light
* Juggernaut's 
Healing Ward keeps his team healthy even when pushing against Keeper of the Light's Illuminate.
* Blade Fury can dispel 
Blinding Light, as well as dodge an incoming Illuminate. Juggernaut can attack towers during Blade Fury, so he can dodge an Illuminate without having to stop pushing.
* Should Keeper of the Light obtain 
Will-o-Wisp through purchasing an Aghanim's Scepter, Juggernaut can make quick work of Ignis Fatuus without being interrupted by its pull.
* Keeper of the Light has low health, low armor, and no natural defense against 
Blade Fury.
Additional:
* Blade Fury allows him to be immune to all of Ezalor's abilities.
* Healing Ward heals his entire team, mitigating Ezalor's weak magical burst damage.
Keeper of the Light
* Keeper of the Light's Blinding Light makes Juggernaut miss his attacks. However, it can be dispelled easily with Blade Fury.
Broodmother
[wiki] rating: -2.0 (winrate: 54% pickrate: 3%)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.
Keeper of the Light
* Illuminate wipes out Broodmother's spiders and prevents her from pushing the lane. It also gives vision to reveal where broodmother is hiding in the trees.
Nature's Prophet
[wiki] rating: -1.6 (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.
Keeper of the Light
* Keeper of the Light can stall pushes with Illuminate. This makes him strong against pushing heroes: Terrorblade Naga siren Nature's Prophet and Anti-Mage
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.
Keeper of the Light
* Heroes with summons/illusions/neutral creep armies: 
Beastmaster, 
Chen, Naga Siren
Terrorblade
[wiki] rating: -1.2 (winrate: 45% pickrate: 2%)Sand King
* Because of his massive AoE damage, Sand King is very effective against illusion heroes: 
Chaos Knight, Phantom Lancer, Terrorblade,...
Keeper of the Light
* Keeper of the Light can stall pushes with Illuminate. This makes him strong against pushing heroes: Terrorblade Naga siren Nature's Prophet and Anti-Mage
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.
Keeper of the Light
* 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.
Naga Siren
[wiki] rating: -1.2 (winrate: 51% pickrate: 3%)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.
Keeper of the Light
* Keeper of the Light can stall pushes with Illuminate. This makes him strong against pushing heroes: Terrorblade Naga siren Nature's Prophet and Anti-Mage
Phantom Assassin
[wiki] rating: -1.0 (winrate: 46% pickrate: 10%)Keeper of the Light
* Heroes with teleports to escape Solar Blind and Will-O-Wisp: Phantom Assassin, Puck, Queen of Pain, Storm Spirit
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.
Keeper of the Light
* Heroes which rely exclusively on right clicks will struggle somewhat against Blinding Light: Phantom Assassin, Wraith King, Medusa
Monkey King
[wiki] rating: -1.0 (winrate: 47% pickrate: 8%)Keeper of the Light
* Blinding Light can knock Monkey King outside of his ultimate, Wukong's Command and can blind him.
* Will-O-Wisp will stun Monkey King from Tree Dance by destroying his tree.
Additional:
* Blinding Light can easily push Monkey King out of Wukong's Command, as well as blinding him.
* Monkey King is vulnerable to burst damage, 
Solar Bind makes him more so
* However, Keeper of the Light can be easily ganked by Monkey King during early-mid game stage.
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.
Beastmaster
[wiki] rating: -1.0 (winrate: 51% pickrate: 2%)Keeper of the Light
* Illuminate clears Beastmaster's summons and is effective against his push.
Sniper
[wiki] rating: -0.6 (winrate: 44% pickrate: 11%)Sand King
* Sand King is a strong ganker, allowing him to shut down squishy heroes in the early game: Phantom Assassin, 
Clinkz, 
Sniper, 
Enchantress,...
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,...
Medusa
[wiki] rating: -0.6 (winrate: 45% pickrate: 1%)Keeper of the Light
* 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.
Enchantress
[wiki] rating: -0.6 (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,...
Faceless Void
[wiki] rating: -0.6 (winrate: 48% pickrate: 9%)Keeper of the Light
* Any hero that can nullify effects of Chronosphere: (Keeper of the Light with Aghanim's Scepter during daytime, 
Winter Wyvern), banishing him or Faceless Void (
Outworld Destroyer, 
Shadow Demon, 
Earth Spirit with Aghanim's Scepter) or protecting him in other ways (
Dazzle, Oracle, 
Abaddon) can greatly limit Chronosphere's potential.
Pangolier
[wiki] rating: -0.6 (winrate: 48% pickrate: 9%)Keeper of the Light
* Certain heroes can mess up with Pangolier's positioning and timing (especially if he intends to use Rolling Thunder during combat): 
Vengeful Spirit, Keeper of the Light, Huskar, Dark Seer
Sven
[wiki] rating: -0.6 (winrate: 48% pickrate: 2%)Keeper of the Light
* Melee carries during the laning phase: Sven, Slark
Spirit Breaker
[wiki] rating: -0.6 (winrate: 48% pickrate: 9%)Keeper of the Light
* Heroes that punish mobile heroes: 
Bloodseeker, Keeper of the Light
Wraith King
[wiki] rating: -0.6 (winrate: 48% pickrate: 4%)Keeper of the Light
* Heroes which rely exclusively on right clicks will struggle somewhat against Blinding Light: Phantom Assassin, Wraith King, Medusa
Viper
[wiki] rating: -0.6 (winrate: 49% pickrate: 4%)Keeper of the Light
* Heroes with extremely slow movement speed will cripple against Solar Bind: Medusa, Viper
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,...
Ursa
[wiki] rating: -0.6 (winrate: 52% pickrate: 15%)Sand King
* Heroes that rely on slows to get kills: Lifestealer, Night Stalker, Ursa,...
Templar Assassin
[wiki] rating: -0.4 (winrate: 48% pickrate: 4%)Keeper of the Light
* Heroes that can jump and kill him: 
Meepo, Clinkz, Templar Assassin
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.
Enigma
[wiki] rating: -0.4 (winrate: 50% pickrate: 3%)Keeper of the Light
* Heroes with channeling abilities: Enigma, Witch Doctor, Crystal Maiden.
Keeper of the Light
* Illuminate can wipe the pushing Eidolons in a lane with ease, diminishing Enigma's laning presence by a lot.
* However, Keeper of the Light does not have any way to cancel Black Hole outside from Will-O-Wisp from Aghanim's Scepter.
Phantom Lancer
[wiki] rating: -0.4 (winrate: 50% pickrate: 2%)Keeper of the Light
* Heroes with dispels: Legion Commander, Oracle, Slark, Phantom Lancer
Sand King
* All of Sand King's abilities deal AoE damage.
* However, Epicenter is usually a non-issue against Doppelganger.
Slark
[wiki] rating: -0.4 (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.
Keeper of the Light
* Heroes with dispels: Legion Commander, Oracle, Slark, Phantom Lancer
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.
Keeper of the Light
* Melee carries during the laning phase: Sven, Slark
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,...
Jakiro
[wiki] rating: 0.0 (winrate: 51% pickrate: 12%)Keeper of the Light
* Jakiro's reliance on his abilities can cause struggles for heroes who rely on evasion or blinds to get upper hand: Phantom Assassin, 
Windranger, Riki, 
Troll Warlord, Keeper of the Light.
Sand King
* Heroes with no mobility will take some good damage from Sand King's spells: Dragon Knight, Jakiro, Pugna, Earthshaker,...
Clinkz
[wiki] rating: 0.0 (winrate: 52% pickrate: 7%)Keeper of the Light
* With 
Bloodthorn, Clinkz becomes a strong counter to heroes who rely on evasion and blind such as Windranger, Phantom Assassin, Troll Warlord and Keeper of the Light.
Sand King
* Sand King is a strong ganker, allowing him to shut down squishy heroes in the early game: Phantom Assassin, Clinkz, Sniper, Enchantress,...
Meepo
[wiki] rating: 0.0 (winrate: 56% pickrate: 1%)Keeper of the Light
* Heroes that can jump and kill him: Meepo, Clinkz, Templar Assassin
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.
Lycan
[wiki] rating: 0.0 (winrate: 57% pickrate: 3%)Keeper of the Light
* Heroes with hastes: Dark Seer, Lycan
Keeper of the Light
* Keeper of the Light has a blind, which causes Lycan to miss his attacks.
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,
*
Keeper of the Light
* Being a cast-oriented hero, Ezalor will suffer from all of Silencer's abilities.
Global Silence is a guaranteed lengthy silence which will render Ezalor useless in a teamfight.
Arcane Curse and 
Last Word are good against any caster, since they are extremely potent.
*
*
* However, it should be worth mentioning that a smart Ezalor will buy Eul's Scepter of Divinity to dispel Silencer's abilities. Combined with the level 20 talent (Chakra Magic applies a basic dispel), Ezalor can purge Silencer's abilities off allies and himself alike.