Night Stalker
[wiki] rating: 1.6 (winrate: 50% pickrate: 6%)Clinkz
[wiki] rating: 1.2 (winrate: 52% pickrate: 9%)Oracle
* Heroes who can take advantage of Oracle's low mobility or catch him out of position, such as 
Clinkz and 
Anti-Mage, can easily pick him off.
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.
Phantom Lancer
[wiki] rating: 1.2 (winrate: 51% pickrate: 4%)Keeper of the Light
* Heroes with dispels: 
Legion Commander, 
Oracle, 
Slark, 
Phantom Lancer
Oracle
* Heroes who are not easily crippled by Fate's Edict or Fortune's End, such as 
Timbersaw, or those who can dispel them, such as Phantom Lancer, can kill Oracle unhindered.
Templar Assassin
[wiki] rating: 1.2 (winrate: 47% pickrate: 4%)Keeper of the Light
* Heroes that can jump and kill him: 
Meepo, Clinkz, 
Templar Assassin
Oracle
* Because Oracle uses few, powerful instances of damage to kill enemies, Templar Assassin's 
Refraction and 
Visage's 
Gravekeeper's Cloak can absorb his burst damage.
Silencer
[wiki] rating: 1.0 (winrate: 54% pickrate: 15%)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.
Oracle
* Oracle's reliance on spamming his spells can be easily hindered by Silencer's Arcane Curse.
* Last Word and Global Silence negates Oracle's attempt to save his allies with his spells.
* 
Fate's Edict is useless against Glaives of Wisdom's pure damage.
Oracle
* Fortune's End can nullify Arcane Curse, Last Word, and Global Silence, if cast at the right time with the right targets.
* Fate's Edict can prevent Silencer from attacking, which he relies on with 
Glaives of Wisdom, for a lot of his damage.
Anti-Mage
[wiki] rating: 1.0 (winrate: 51% pickrate: 8%)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.
Oracle
* Anti-Mage can withstand magical burst damage much better than other carries, making him effective against nukers: 
Lich, 
Necrophos, Oracle, and 
Leshrac.
Additional:
* Oracle has minimal damage potential against Anti-Mage due to Counterspell, and may even have some ability damage reflected at himself.
* Anti-Mage can easily overwhelm Oracle with 
Mana Break and Mana Void.
* Blink allows Anti-Mage to easily chase and take advantage of Oracle's low mobility.
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
Spectre
[wiki] rating: 1.0 (winrate: 49% pickrate: 5%)Oracle
* Oracle's burst damage is not enough to take down Spectre due to 
Dispersion.
* Disarm from Fate's Edict does not hinder Spectre that much, since she can deal damage even without landing a single attack.
Additional:
* Oracle's burst damage is ineffective against Dispersion.
* Disarm provided by Fate's Edict is not as significant debilitation for Spectre as it might be for other carries since She can do damage even without landing attacks.
Bloodseeker
[wiki] rating: 1.0 (winrate: 49% pickrate: 4%)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.
Axe
[wiki] rating: 1.0 (winrate: 48% pickrate: 10%)Oracle
* False Promise will not save an ally from 
Culling Blade if their health is low enough.
* Fate's Edict, offensively or defensively, does little to protect Oracle's allies from the majority of Axe's damage.
Bristleback
[wiki] rating: 1.0 (winrate: 42% pickrate: 2%)Oracle
* Fortune's End cannot dispel 
Warpath stacks on Bristleback or 
Quill Spray stacks on allies.
* 
Bristleback can heavily reduce Oracle's damage output. With it, Oracle may accidentally heal Bristleback with Purifying Flames, especially if Bristleback has bonus magic resistance.
Visage
[wiki] rating: 0.6 (winrate: 56% pickrate: 5%)Oracle
* Heroes that deal few, powerful instances of damage, like Oracle, 
Lion, or 
Sven, have a hard time breaking through Gravekeeper's Cloak.
Riki
[wiki] rating: 0.6 (winrate: 55% pickrate: 6%)Keeper of the Light
* Heroes with silences: 
Puck, 
Doom, 
Riki.
Meepo
[wiki] rating: 0.6 (winrate: 52% pickrate: 1%)Keeper of the Light
* Heroes that can jump and kill him: Meepo, Clinkz, Templar Assassin
Nyx Assassin
[wiki] rating: 0.6 (winrate: 52% pickrate: 7%)Keeper of the Light
* Large area-of-effect with delay or require channeling: 
Enigma, 
Crystal Maiden, 
Invoker, 
Shadow Fiend, 
Pugna, Keeper of the Light
* The nature of some abilities turn them into an easy target for a turnover from Spiked Carapace:
* Slow-moving projectiles: 
Skywrath Mage, 
Tinker, Necrophos
* Large area-of-effect with delay or require channeling: Enigma, Crystal Maiden, Invoker, Shadow Fiend, Pugna, Keeper of the Light
* Deals damage over time: 
Venomancer, 
Huskar, 
Ember Spirit, 
Dark Seer, 
Sand King, Doom
Additional:
* 
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.
Huskar
[wiki] rating: 0.6 (winrate: 52% pickrate: 5%)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.
Elder Titan
[wiki] rating: 0.6 (winrate: 50% pickrate: 2%)Oracle
* 
Elder Titan's 
Echo Stomp can turn into a 5 second stun on an ally under the effect of False Promise, as it delays all damage and makes it impossible to break the damage threshold of Echo Stomp.
Lifestealer
[wiki] rating: 0.6 (winrate: 50% pickrate: 9%)Keeper of the Light
* Heroes who have most or all their abilities (damage or disable) unable to pierce spell immunity: Keeper of the Light, 
Lina, Lion, 
Zeus.
Additional:
* 
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.
Tiny
[wiki] rating: 0.6 (winrate: 49% 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.
Doom
[wiki] rating: 0.6 (winrate: 47% pickrate: 6%)Keeper of the Light
* Heroes with silences: Puck, Doom, Riki.
Oracle
* Supports with useful teamfight or contribution spells will be helpless against Doom: 
Dazzle, Oracle, 
Warlock.
Oracle
* Heroes with the ability to heal allies, or those with good defensive abilities: 
Chen, Dazzle, 
Io, Oracle, 
Omniknight, 
Witch Doctor, 
Winter Wyvern, 
Abaddon, etc.
Puck
[wiki] rating: 0.6 (winrate: 47% pickrate: 7%)Keeper of the Light
* 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.
Storm Spirit
[wiki] rating: 0.6 (winrate: 47% pickrate: 4%)Keeper of the Light
* Heroes with teleports to escape Solar Blind and Will-O-Wisp: Phantom Assassin, Puck, 
Queen of Pain, 
Storm Spirit
Queen of Pain
[wiki] rating: 0.6 (winrate: 46% pickrate: 7%)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: 46% pickrate: 12%)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.
Oracle
* Heroes with long disables, like Lion, 
Night Stalker, or Legion Commander, can prevent Oracle from using spells or items.
Oracle
* Lion is extremely dependent on his abilities. Silences like Silencer's Last Word, magic resistance like Oracle's Fate's Edict, and dispels like Legion Commander's 
Press the Attack all make his abilities less effective.
Timbersaw
[wiki] rating: 0.6 (winrate: 45% pickrate: 4%)Oracle
* Heroes who are not easily crippled by Fate's Edict or Fortune's End, such as Timbersaw, or those who can dispel them, such as Phantom Lancer, can kill Oracle unhindered.
Shadow Demon
[wiki] rating: 0.4 (winrate: 46% pickrate: 2%)Oracle
* 
Disruption can protect Shadow Demon's allies from Fortune's End, preserving healing or buffs. It can also catch Oracle's allies, allowing 
Shadow Poison to be used without being dispelled.
* 
Demonic Purge prevents over-time healing during False Promise, such as Purifying Flames and 
Urn of Shadows. If he has 
Aghanim's Scepter, this issue can persist for longer or on multiple allies.
* It will not, however, prevent healing from instant abilities, items, or auras, making 
Mekansm a good choice against him.
Oracle
* Heroes who can dispel will be able to remove remove Soul Catcher's debuff to instantly bring the health of affected heroes back to a considerable amount: Abaddon, Slark, Legion Commander, Oracle.
Beastmaster
[wiki] rating: -2.0 (winrate: 49% pickrate: 3%)Oracle
* 
False Promise effectively nullifies Primal Roar's single-target initiation on allies.
* 
Purifying Flames kills Beastmaster's Hawk instantly and Boar with two casts.
Keeper of the Light
* Illuminate clears Beastmaster's summons and is effective against his push.
Wraith King
[wiki] rating: -1.2 (winrate: 46% pickrate: 4%)Keeper of the Light
* Heroes which rely exclusively on right clicks will struggle somewhat against Blinding Light: Phantom Assassin, 
Wraith King, 
Medusa
Oracle
* Heroes with area dispel can kill multiple skeletons at once: 
Brewmaster, Oracle.
Magnus
[wiki] rating: -1.2 (winrate: 50% pickrate: 11%)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.
Oracle
* 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.
Sven
[wiki] rating: -1.2 (winrate: 50% pickrate: 4%)Keeper of the Light
* Keeper of the Light's AoE blind can keep Sven from landing hits.
Oracle
* Fate's Edict cripples many heroes who rely on attacks, such as Phantom Assassin, Sven, or 
Enchantress, without a dispel or a 
Black King Bar.
Monkey King
[wiki] rating: -1.0 (winrate: 45% pickrate: 9%)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.
Pugna
[wiki] rating: -1.0 (winrate: 46% pickrate: 2%)Oracle
* All of Pugna's damage is magical, which can get blocked by Fate's Edict's 100% magic resistance.
* Oracle has two abilities that apply a dispel, which can easily remove Decrepify on his ally or Oracle.
Batrider
[wiki] rating: -1.0 (winrate: 46% pickrate: 2%)Oracle
* False Promise dispels Flaming Lasso.
* 
Fortune's End can root Batrider after he uses Flaming Lasso. It can also dispel Sticky Napalm and Flamebreak.
* Fate's Edict when used on a Lasso'd target will leave them immune to magical damage, making it difficult to burst them quickly before the Lasso ends.
Necrophos
[wiki] rating: -1.0 (winrate: 46% pickrate: 6%)Oracle
* During the laning stage, Oracle's Purifying Flames nullifies any damage that Heartstopper Aura might inflict.
* Fate's Edict and False Promise can protect an ally from Reaper's Scythe.
* Oracle can dispel Ghost Shroud with Fortune's End.
Additional:
* Fortune's End can dispel 
Ghost Shroud, rending Necrophos vulnerable to physical damage. Also it's worth noting that Necrophos takes additional magic damage when in Ethereal state, which makes Purifying Flames a powerful nuke against him.
* Fate's Edict fully negates the damage from 
Reaper's Scythe, which its own delayed animation makes it relatively easy to predict and nullify.
Techies
[wiki] rating: -1.0 (winrate: 47% pickrate: 7%)Oracle
* Fate's Edict gives 100% magic resistance, which prevents most of Techies' damage.
* Oracle's Fortune's End dispels Reactive Tazer buff from Techies allowing him to be attacked. However, Reactive Tazer will instantly perform the area of effect disarm that is normally applied at the end of the duration.
* Fortune's End will also dispel Blast Off silence, Techies' Etheral Blade, Proximity Mines' magic resistance reduction, and Sticky Bomb's slow. However beware that it will only dispel Sticky Bomb's first or second instance of slow and not the damage, which will trigger as normal.
Additional:
* Since Techies' skills are all magical damage, casting Fate's Edict immediately upon hearing the warning sound from 
Proximity Mines and 
Blast Off! can render Oracle or an ally immune to the burst damage from these skills.
* If timed correctly, 
Remote Mines can also be countered using the same technique.
Rubick
[wiki] rating: -1.0 (winrate: 47% pickrate: 22%)Oracle
* Oracle's high magic damage output can easily take down Rubick's low health pool.
* Because Oracle likes to combine his spells together, the only good 
Spell Steal target he gives is False Promise. This scenario can be avoided by shift queueing Fortune's End and casting it immediately, as it has no cast point, or by staying in the back line of fights if out of mana.
* As a position based hero, Rubick will have a very hard time against Fortune's End due to its absurd range and very long root duration.
Dark Willow
[wiki] rating: -1.0 (winrate: 47% pickrate: 5%)Oracle
* Fortune's End can easily dispel 
Cursed Crown before it times out and stuns. He can also save a stunned ally with False Promise.
* Fate's Edict can easily negate 
Bedlam's over-time damage, since the spell provides no form of control. Similarly, he can also negate the magic burst from 
Shadow Realm.
* Fortune's End can dispel the fear effect from 
Terrorize, and it can remove the root from 
Bramble Maze if you're quick enough. Be mindful that Fortune's End only dispels your allies' debuffs on the primary target.
Additional:
* Fortune's End not being disjointable is almost an ensured disable if Dark Willow tries to escape with Shadow Realm. Dispels Cursed Crown and Terrorize.
* Fate's Edict negates all her magic damage in case she catches a single hero.
* False Promise's strong dispel removes Dark Willow's disables.
Ogre Magi
[wiki] rating: -1.0 (winrate: 47% pickrate: 11%)Oracle
* Fate's Edict gives full immunity from Ogre Magi's mostly magical damage.
* Fortune's End can dispel Ignite (when used on allies) and Bloodlust (when used on enemies).
* False Promise can dispel Ignite and Fireblast.
Ember Spirit
[wiki] rating: -1.0 (winrate: 48% pickrate: 8%)Oracle
* Oracle can shut down both of Ember's early game abilities. Fortune's End can dispel 
Flame Guard on Ember Spirit and 
Searing Chains on allies.
* When Ember Spirit is affected by Fortune's End, his 
Fire Remnants move at 0 movement speed.
* Disarming him with Fate's Edict does affect Ember's 
Sleight of Fist ability, possibly making him useless for a few seconds in the late game without a dispel or spell immunity. This is especially good if he has a rapier or two. However, positioning for this is difficult when Ember plays far back.
Phoenix
[wiki] rating: -1.0 (winrate: 49% pickrate: 5%)Oracle
* Phoenix does significant magic damage over time which can either be dispelled or negated by Fate's Edict.
* Since Phoenix sacrifices some of his health to cast abilities it makes him very vulnerable to Oracle's burst potential
Troll Warlord
[wiki] rating: -1.0 (winrate: 49% pickrate: 2%)Oracle
* Fate's Edict can disarm Troll, rendering him useless in a teamfight, especially if he has already used Battle Trance.
* Fortune's End and Purifying Flames can provide ample magic damage to help burst down Troll Warlord quickly in the early to mid game.
* False Promise can save an ally from Troll Warlord's initiation, forcing him to switch targets and lose his Fervor stacks, or waste time during Battle Trance.
Ancient Apparition
[wiki] rating: -1.0 (winrate: 50% pickrate: 6%)Oracle
* False Promise can dispel the stun from Cold Feet and can save an ally that's about to shatter from Ice Blast, even allowing healing with Purifying Flames by delaying it until after the debuff expires.
* Purifying Flames allows Oracle to deny his allies if they're affected by Ice Blast. If he brings his allies' health to or below the shatter threshold, it will count as him denying the ally. However, this does not work on Oracle himself.
* Fate's Edict provides 100% magic resistance, making it good against all of Ancient Apparition's abilities at all stages of the game.
* Fortune's End can dispel Cold Feet from allies.
Additional:
* False Promise can prevent the shatter from 
Ice Blast and Fate's Edict can protect an ally from the magical damage over time for a while.
* Oracle can deny allies who are frostbitten. If he uses Purifying Flames to reach the shatter threshold, it will count as a deny.
* Fortune's End can dispel 
Cold Feet on affected allies, preventing them from getting frozen.
Jakiro
[wiki] rating: -1.0 (winrate: 50% pickrate: 11%)Oracle
* Fate's Edict allows Oracle to make allies spell immune, allowing him to save allies from Jakiro's spells.
* Fate's Edict can be cast onto Jakiro to disarm him and prevent him from pushing with his Liquid Fire.
* False Promise allows Oracle to free allies from Jakiro's Ice Path.
Venomancer
[wiki] rating: -1.0 (winrate: 50% pickrate: 6%)Oracle
* Fortune's End can dispel Venomous Gale and Poison Sting from allies.
* Fate's Edict grants 100% magic resistance to target, inhibiting the damage from Venomancer abilities.
Skywrath Mage
[wiki] rating: -1.0 (winrate: 50% pickrate: 10%)Oracle
* Fate Edict can completely negate Skywrath Mage's heavy magic damage.
* Fortune End dispels 
Ancient Seal.
Marci
[wiki] rating: -1.0 (winrate: 51% pickrate: 17%)Oracle
* Fortune's End dispells Marci's 
Sidekick, removing additional damage and lifesteal.
* Fate's Edict disarms Marci, preventing her from attacking with 
Unleash. Also it is useful against Marci or her ally affected by Sidekick.
* False Promise is a great tool to save an ally focused by Marci.
Slardar
[wiki] rating: -1.0 (winrate: 51% pickrate: 6%)Oracle
* Fortune's End applies a basic dispel which can be used to dispel Corrosive Haze, or even Slardar's own Guardian Sprint.
* False Promise is able to dispel Corrosive Haze and Slithereen Crush stun/slow from any allies Oracle chooses to cast it on.
* Fate's Edict can also be cast on Slardar to prevent him from proccing his Bash of the Deep.
Leshrac
[wiki] rating: -1.0 (winrate: 52% pickrate: 10%)Oracle
* Oracle's Fate's Edict will protect an ally from Leshrac's nuking damage.
* Oracle's False Promise can dispel Leshrac's stun and slow from his abilities, allowing an ally to escape.
* Fortune's End can stop Leshrac from chasing opponents or running away.
Omniknight
[wiki] rating: -1.0 (winrate: 55% pickrate: 4%)Oracle
* Fortune's End's AoE dispel will remove Heavenly Grace and Guardian Angel.
Additional:
* With Fortune's End, Oracle can dispel 
Guardian Angel in an area of effect.
Enchantress
[wiki] rating: -0.6 (winrate: 43% pickrate: 4%)Oracle
* Heroes with little health or magic resistance are easily picked off with Oracle's magic burst, such as Skywrath Mage, Crystal Maiden, or Enchantress.
Nature's Prophet
[wiki] rating: -0.6 (winrate: 44% pickrate: 4%)Keeper of the Light
* Heroes that have AoE damage: Lina, Keeper of the Light, Timbersaw, Leshrac, 
Bristleback, 
Axe
Phantom Assassin
[wiki] rating: -0.6 (winrate: 45% pickrate: 14%)Keeper of the Light
* Heroes with teleports to escape Solar Blind and Will-O-Wisp: Phantom Assassin, Puck, Queen of Pain, Storm Spirit
Keeper of the Light
* Heroes which rely exclusively on right clicks will struggle somewhat against Blinding Light: Phantom Assassin, Wraith King, Medusa
Oracle
* Fate's Edict cripples many heroes who rely on attacks, such as Phantom Assassin, Sven, or Enchantress, without a dispel or a Black King Bar.
Razor
[wiki] rating: -0.6 (winrate: 46% pickrate: 4%)Oracle
* Fortune's End can catch out or impair position-based heroes with low mobility, such as 
Sniper or Razor.
Terrorblade
[wiki] rating: -0.6 (winrate: 46% pickrate: 4%)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
Medusa
[wiki] rating: -0.6 (winrate: 47% pickrate: 2%)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.
Viper
[wiki] rating: -0.6 (winrate: 47% pickrate: 4%)Keeper of the Light
* Heroes with extremely slow movement speed will cripple against Solar Bind: Medusa, Viper
Void Spirit
[wiki] rating: -0.6 (winrate: 47% pickrate: 7%)Oracle
* Heroes that can purge his slow and disables are very difficult to go on and their team: Abaddon, Oracle.
Mars
[wiki] rating: -0.6 (winrate: 47% pickrate: 12%)Oracle
* Heroes with high magical or pure damage will bypass Bulwark: Timbersaw, 
Dark Willow, Enigma, Invoker, Pugna, Skywrath Mage, Tinker, Zeus, Oracle.
Pangolier
[wiki] rating: -0.6 (winrate: 48% pickrate: 11%)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
Spirit Breaker
[wiki] rating: -0.6 (winrate: 49% pickrate: 9%)Keeper of the Light
* Heroes that punish mobile heroes: 
Bloodseeker, Keeper of the Light
Bane
[wiki] rating: -0.6 (winrate: 49% pickrate: 3%)Oracle
* Heroes with strong dispels can dispel Bane's disables from their allies: Oracle, Legion Commander, Omniknight.
Sniper
[wiki] rating: -0.6 (winrate: 50% pickrate: 17%)Oracle
* Fortune's End can catch out or impair position-based heroes with low mobility, such as Sniper or Razor.
Bounty Hunter
[wiki] rating: -0.6 (winrate: 50% pickrate: 6%)Oracle
* Oracle with Fortune's End and False Promise
* Heroes that can remove the Track debuff with their skills:
* Abaddon with 
Aphotic Shield and 
Borrowed Time
* Huskar with 
Life Break
* 
Juggernaut with 
Blade Fury
* Legion Commander with Press the Attack
* 
Lifestealer with Rage and 
Infest
* Naga Siren with 
Mirror Image
* Omniknight with 
Heavenly Grace
* Oracle with Fortune's End and False Promise
* Phantom Lancer with 
Doppelganger
* Slark with 
Dark Pact
* 
Ursa with 
Enrage
* 
Weaver with 
Time Lapse
* Tidehunter with 
Kraken Shell when damage received reaches the threshold.
Chen
[wiki] rating: -0.6 (winrate: 50% pickrate: 1%)Keeper of the Light
* Heroes with summons/illusions/neutral creep armies: 
Beastmaster, Chen, Naga Siren
Mirana
[wiki] rating: -0.6 (winrate: 52% pickrate: 15%)Oracle
* Heroes that can protect or dispel stunned allies such as Legion Commander, 
Outworld Destroyer, 
Shadow Demon and Oracle can reduce the effectiveness of Sacred Arrow.
Naga Siren
[wiki] rating: -0.6 (winrate: 54% pickrate: 6%)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
Witch Doctor
[wiki] rating: -0.4 (winrate: 49% pickrate: 14%)Keeper of the Light
* Heroes with channeling abilities: Enigma, Witch Doctor, Crystal Maiden.
Oracle
* It is especially easy for Oracle to negate the damage from Maledict, and even heal through it with Fate's Edict and Purifying Flames.
* If by some miracle an enemy is still about to die because of Maledict, he can still save him with False Promise.
Dark Seer
[wiki] rating: -0.4 (winrate: 49% pickrate: 2%)Keeper of the Light
* Heroes with hastes: Dark Seer, 
Lycan
Oracle
* Fortune's End dispels Ion Shell and Surge, making any gank attempt on Dark Seer in the laning phase likely to succeed.
* Fate's Edict prevents all magical damage that comes from Dark Seer's abilities.
* Fortune's End dispels Ion Shell on creeps, which Dark Seer relies on to farm and zone.
Additional:
* Fortune's End can dispel 
Ion Shell, which cripples Dark Seer economy since it's his most efficient tool for farming.
* Fortune's End can dispel 
Surge, effectively slowing his movement speed making him vulnerable to ganks or skirmishes.
Enigma
[wiki] rating: -0.4 (winrate: 52% pickrate: 6%)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.
Broodmother
[wiki] rating: -0.4 (winrate: 55% pickrate: 5%)Oracle
* Oracle cannot easily deal with swarms of units, making him weak against heroes like Phantom Lancer or 
Broodmother.
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.
Faceless Void
[wiki] rating: -0.2 (winrate: 49% pickrate: 11%)Oracle
* 
Time Walk and 
Backtrack allow Faceless Void to easily negate Oracle's burst damage.
* 
Time Dilation is effective against Oracle's low-cooldown spells. Although dispellable with Fortune's End, it can still catch Oracle off guard if Fortune's End is on cooldown.
Oracle
* 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.
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.
Juggernaut
[wiki] rating: -0.2 (winrate: 50% pickrate: 17%)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.
Oracle
* Heroes with abilities that can save teammates are also effective such as Shadow Demon, Dazzle, Oracle, 
Bane, Pugna, 
Tusk, Winter Wyvern, Io, 
Underlord, Treant Protector and Keeper of the Light.
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.
Primal Beast
[wiki] rating: 0.0 (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...
Oracle
* Primal Beast really suffers against supports he cannot bully in the lane, this includes Dazzle, Shadow Demon and Oracle since they can use their respective abilities to stop Primal Beast from dealing damage, or make it hard for him to stay in range.
Legion Commander
[wiki] rating: 0.0 (winrate: 51% pickrate: 13%)Oracle
* Heroes with long disables, like Lion, Night Stalker, or Legion Commander, can prevent Oracle from using spells or items.
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.
Oracle
* Fate's Edict prevents Legion Commander from attacking for a few seconds, potentially saving Oracle's ally.
* Fortune's End dispels Press the Attack's healing and attack speed buff, as well as the movement speed bonus from Overwhelming Odds.
* False Promise protects allies and prevents Legion Commander from winning Duels and gaining bonus damage.
Additional:
* Provided that the enemy team does not have an Axe, Oracle can guarantee that his ally survives for the duration of the Duel with False Promise and has decent nuke potential to help ally to win a Duel. He can also disarm Legion Commander with Fate's Edict.
* Oracle can dispel enemy buffs like 
Overwhelming Odds and Press the Attack with Fortune's End.
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
Crystal Maiden
[wiki] rating: 0.0 (winrate: 51% pickrate: 18%)Keeper of the Light
* Heroes with channeling abilities: Enigma, Witch Doctor, Crystal Maiden.
Oracle
* Heroes with little health or magic resistance are easily picked off with Oracle's magic burst, such as Skywrath Mage, Crystal Maiden, or Enchantress.
Slark
[wiki] rating: 0.0 (winrate: 52% pickrate: 14%)Keeper of the Light
* Heroes with dispels: Legion Commander, Oracle, Slark, Phantom Lancer
Keeper of the Light
* Melee carries during the laning phase: Sven, Slark
Lycan
[wiki] rating: 0.0 (winrate: 55% pickrate: 2%)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.
Keeper of the Light
* 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.
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:
*
*
Oracle
* Heroes with long disables, like
Lion, 
Night Stalker, or 
Legion Commander, can prevent Oracle from using spells or items.