Binding of Isaac: Rebirth Wiki

Added in Repentance

Tainted Azazel is a character added in The Binding of Isaac: Repentance. He is the alternate version of Azazel Azazel but his horns are broken with blood leaking from the left stump, and his wings were cut or ripped off. Tainted Azazel is unlocked by reaching Home Home and using either the Red Key Red Key or the Cracked Key Cracked Key to access a special room in one of the walls while playing as Azazel.

Tainted Azazel starts with 3 Black Heart Black Hearts and has his short Brimstone Brimstone replaced with a room-long version that is very thin, high-pitched in sound, deals only x0.5 damage per tick and has a shorter duration (unless he actually holds Brimstone).

At the start of charging the Brimstone Brimstone attack Azazel will fire Hemoptysis Hemoptysis, causing a short-range, high-knockback "sneeze" attack that will curse enemies hit with small Brimstone icon that hovers above its head and deal x1.5 damage. Hitting enemies with the Hemoptysis sneeze halves Brimstone's remaining charge time. Enemies will also take damage when knocked into walls or obstacles, and deal damage when colliding with other enemies. Furthermore, enemies cursed by Hemoptysis will take full damage from his Brimstone beam for approximately 5 seconds; if killed during this time with Brimstone, they will explode, dealing damage to nearby enemies and spread the curse to them. The Brimstone curse also applies to any enemies spawned by an enemy already effected by the curse. For example, the enemies and bosses spawned by Mom's Heart Mom's Heart will also have the curse if Mom's Heart had the curse at the time.

Unlike Azazel, Tainted Azazel cannot fly.

Unlockable Items[]


  • Brimstone Brimstone will give Tainted Azazel a regular beam.
    • Picking up two copies will give Tainted Azazel the powered-up version of the beam.
    • Likewise, stacking two uses of Sulfur Sulfur in the same room will also temporarily increase the damage and size of the beam.
    • It is also worth mentioning that, due to Tainted Azazel's smaller-width Brimstone being functionally identical to 'standard' Brimstone, other synergies such as The Ludovico Technique The Ludovico Technique and A Lump of Coal A Lump of Coal work the same as they do on Brimstone.
  • Picking up items like Haemolacria Haemolacria or Mom's Knife Mom's Knife will change Brimstone to normal tears.
  • Tech X Tech X overrides Hemoptysis, and will fire thin Brimstone rings without the 0.5x damage multiplier.
  • Spirit Sword Spirit Sword overrides Hemoptysis and Brimstone but sword swings will deal increased damage.
  • The laser ring created by The Ludovico Technique The Ludovico Technique deals full damage without needing to first use Hemoptysis.
  • In Co-Op, when Tainted Azazel dies, his ghost will maintain his Brimstone and Hemoptysis abilities. The first is weakened by the damage debuff applied to ghostly players, and the second is weakened as it has a very small size when dead.
  • Ipecac Ipecac sneezes are harmless to Tainted Azazel, but sneezes from Incubus Incubus or Twisted Pair Twisted Pair with Ipecac are capable of damaging Tainted Azazel.
  • Picking up Lachryphagy Lachryphagy as Tainted Azazel turns his brimstone into a short range attack that leaves Lachryphagy tears.

Birthright Birthright effect[]

Doubles the size of Tainted Azazel's Hemoptysis Hemoptysis attack, but doesn't increase damage.


  • The achievement for unlocking Tainted Azazel is "The Benighted", a possible title for the character.
    • "Benighted" means "overtaken by darkness" or "in a state of ignorance", which may be linked to how Azazel is Isaac's inner demon.



Bug Bug! When champion bosses are affected by the Hemoptysis effect, they just turn into their normal variation color.