Outworld Destroyer/Counters

Bad against...

 * Brewmaster's Brewlings are strong counters to OD, as he cannot cast on the Ancient Creep-Heroes, he cannot escape with Astral Imprisonment, and Sanity's Eclipse will do no damage.
 * , along with his natural evasion, make difficult to land during teamfights


 * prevents Outworld Devourer from casting, his main source of damage, and disables him for a long duration. His lack of durability compared to Legion Commander means he is unlikely to survive the Duel.


 * during laning phase prevents Outworld Devourer from harassing with, while allowing Templar Assassin to tear through his low health pool more quickly. Even in later stages of the game, Outworld Devourer cannot quickly deplete Templar Assassin's Refraction charges.
 * If timed correctly, can completely negate damage from.
 * Outworld Devourer has no escape mechanism, so getting slowed by a can easily prove fatal.


 * Outworld Devourer's high mana pool, high intelligence, and low health makes him a prime target for.
 * If timed correctly, will return full damage from  back to Outworld Devourer. Even a reflected  can deal significant damage and make him vulnerable to a follow-up from Nyx Assassin.
 * is also the perfect tool against : if used on Nyx, he can reflect the damage back as he comes out of the prison by casting the ability while imprisoned; if used on any other target, Nyx can come and stand close to it and use it to reflect the damage.


 * heavily damages Outworld Devourer if he tries to use.
 * prevents Outworld Devourer from using and makes him more vulnerable to magic damage.
 * Pugna has higher Intelligence growth than Outworld Devourer, making minimally effective.


 * Silencer's will heavily reduce Outworld Devourer's damage output, particularly from.
 * and will take Outworld Devourer out of the fight unless he has built Black King Bar.


 * As Outworld Devourer has short cast ranges, a short attack range, and no gap-closing abilities, Sniper can kite and harass Outworld Devourer in lane with his long range and zone him out in fights. The continuous area damage from also prevents Astral-Blink escapes.

Others

 * Any heroes with silences can negate the majority of Outworld Devourer's damage output:, , ,.
 * Any heroes with high intelligence, such as, receive little to no damage from.
 * Heroes with built-in Spell Immunity can become immune to all of Outworld Devourer's spells:'s, 's , 's.

Items

 * Instant healing items, such as, , and , can be used inside and the healing will take effect before the damage from the prison, potentially saving the target.
 * significantly reduces 's damage.
 * makes the user immune to all of Outworld Devourer's spells.
 * When using Helm of the Dominator, an Ogre Frostmage's Ice Armor decreases OD's attack speed, making it hard for him to steal intelligence and deal damage with Arcane Orb.

Good against...

 * doesn't work versus because it does pure damage.
 * Anti-Mage cannot burn all of Outworld Devourer's mana without disables, due to.
 * Anti-Mage's illusions are quickly destroyed by.
 * However, if the enemy has multiple means of removing mana, becomes a threat to Outworld Devourer, Anti-Mage has better mobility than Outworld Devourer with, and  blocks a large portion of the damage from.


 * Huskar's main source of survivability,, doesn't work against Outworld Devourer because does pure damage.
 * Outworld Devourer can dodge with, leaving him unharmed while Huskar loses HP.
 * can deal massive damage to Huskar before he builds up his stacks, due to Huskar's low Intelligence.


 * Arcane Orb deals much damage regardless of Morphling's high armor from.
 * Sanity's Eclipse Morphling into trouble as he needs mana for.
 * illusions of Outworld Devourer will not deal much damage as most of that comes from his spells. Also, Replicate illusions of OD's allies fall fast to Arcane Orb.


 * 's pure damage ignores Timbersaw's.
 * Even if Timbersaw gets away from Outworld Devourer, he will still lose a lot of Intelligence from, making it harder to cast his high mana cost spells.


 * and can quickly drain Wraith King's limited mana pool, making him unable to use  or.
 * 's slow projectile speed makes it easy to avoid using.

Others

 * Any heroes with low Intelligence will die quickly or even instantly to :, . The 40% max mana drain also helps to ensure kills on heroes with built-in escape mechanisms.
 * 's Intelligence steal can shut down ability-dependent tanky heroes with medium or low Intelligence:,.

Works well with...

 * and massively increase Outworld Devourer's survivability.
 * Omniknight can spam to heal Outworld Devourer and his teammates thanks to.


 * greatly increases Outworld Devourer's damage output and allows him to steal Intelligence more quickly.
 * and can pin down an enemy for Outworld Devourer to attack.


 * Silencer's passive intelligence steal will increase the intelligence difference between Outworld Devourer and his enemies, making them take more damage from and causing low mana pool heroes to struggle with their mana costs.
 * Global Silence​ will prevent enemies from disabling Outworld Devourer, allowing him to land easy attacks.

Others

 * Any heroes that spam spells benefit greatly from :, ,.
 * Healer-based supports pair especially well with Outworld Devourer due to allowing them to constantly keep their team alive, mitigating the need for . This includes, , , , , and.
 * Any heroes that benefit from 's setup:, ,.

Works poorly with...

 * becomes obsolete once becomes maxed out, as the latter is far more potent than the former.
 * can save someone from and unlike other spells that grant enemies invulnerability, this one lasts for 4 seconds and cannot be canceled/dispelled.

List of heroes that counter Outworld Devourer, and list of heroes that work well with Outworld Devourer.