Binding of Isaac: Rebirth Wiki
Binding of Isaac: Rebirth Wiki

Added in Repentance

Tainted Judas is a character added in The Binding of Isaac: Repentance. He is the alternate version of Judas Judas, and has an appearance similar to Dark Judas Dark Judas. Tainted Judas is unlocked by reaching Home Home and using either the 15►Red Key Red Key or the Cracked Key Cracked Key to access a special room in one of the walls while playing as Judas.

Tainted Judas starts with 2 black hearts and 3 coins. He does not start with 15►The Book of Belial The Book of Belial like Judas does, but instead starts with 15►Dark Arts Dark Arts in his consumable slot. When used, Dark Arts gives Tainted Judas +1.0 speed and makes him invulnerable to damage for a short period of time. Any enemies touched while Dark Arts is active will be frozen until the effect ends, at which point they will take damage (x2.5 your damage + 3.5 flat damage). Any enemy projectiles touched while Dark Arts is active will be destroyed. At the end of the effect, a blast effect occurs. The total explosion damage dealt is proportional to the number of enemies touched, and each enemy killed or projectile destroyed grants Tainted Judas a temporary damage boost. The damage boost scales and lasts longer depending on the number of enemies killed and projectiles destroyed.

Tainted Judas is unable to gain Red Hearts. Health Ups will give him Black Hearts instead. Should he pick up a Bone Heart, he will be unable to fill it with red health.

Items & Strategy Notes[]

  • Tainted Judas is best suited to a highly aggressive playstyle; making effective use of Dark Arts by rushing into the fray and striking as many enemies as possible, then clearing up stragglers with buffed damage. However, it shouldn't be mistaken as a purely offensive tool, as the ability to destroy projectiles gives it great defensive utility when used properly. For example, timing its activation to cross through the origin point of a nova of bullets as they spawn simultaneously removes the need to dodge and grants a massive damage boost.
    • It is vital to get a feel for how long Dark Arts remains active, as being inside an enemy or hazard when it ends will typically result in damage taken.
    • Dark Arts can nullify a lot of the harder puzzle rooms, as one can walk straight through spikes and shots while it's active. In addition, being able to safely enter Curse Rooms grants a risk-free opportunity to build up soul/black hearts or find powerful items every floor.
    • Certain enemies or bosses that rapidly fire bullets, such as Soy Creeps, Revenants, Baby Plum, Hush, etc. are a boon for Tainted Judas; as every bullet walked through contributes to the damage bonus, these can stack up extremely quickly, and as long as the enemy/boss remains alive, this can be repeated indefinitely. This can lead to obscene amounts of damage that can potentially last through an entire run.
  • Tainted Judas is extremely effective in Greed Mode, due to the ability to wholly ignore damage from Curse Rooms / spikes inside the store and the quick transitions between waves allowing for repeated use of Dark Arts to continue stacking damage.
    • Dark Arts can also be used to ignore the damage from the button and pause the timer for free.

Favored Items[]

  • Due to his similar health system, many of the benefits that apply to ??? ??? in regards to health can be applied to Tainted Judas as well.
  • Items that rely on being in close proximity to enemies can be extremely beneficial, due to how often you will need to sprint through them to build Dark Arts effects.
  • 15►Ipecac Ipecac is extraordinarily effective with Dark Arts, as the damage of the Dark Arts hits scales off of the Damage stat, which is increased significantly by Ipecac — it becomes possible to easily shred bosses in a single hit, especially if multiple projectiles are tagged beforehand. However, due to Tainted Judas' low base range, it is easier to hit yourself.
  • As Dark Arts encourages a risky playstyle of throwing oneself into swarms of bullets, items that can block damage while Dark Arts is inactive (such as 15►Host Hat Host Hat, 15►Infamy Infamy, 15►Holy Mantle Holy Mantle, and 15►Belly Jelly Belly Jelly) are very effective.
  • Close-range attack items like 15►120 Volt 120 Volt, 15►Circle of Protection Circle of Protection, and 15►Monstrance Monstrance will safely damage enemies while using Dark Arts. In a similar vein, charged attacks like 15►Maw of the Void Maw of the Void and 15►Revelation Revelation will be released when Dark Arts is used, and with careful positioning can provide excellent extra damage.
  • The knife given by the Yes Mother? transformation will still deal damage while using Dark Arts.
  • 15►Pause Pause will not be stopped by Dark Arts, turning it into an instant room clear in many situations and an effective tool for doing damage against bosses.
  • 15►Friend Finder Friend Finder spawns friendly monsters which Tainted Judas can pass through using Dark Arts to obtain the damage bonus without harming them.
  • 15►9 Volt 9 Volt will effectively halve the time required to charge Dark Arts, making it usable every 3 seconds.
  • 15►Car Battery Car Battery doubles the duration of 15►Dark Arts Dark Arts from 1 second to 2 seconds.
  • 15►Black Hole Black Hole will group all enemies and projectiles in one place, making it much easier to tag them all with Dark Arts.
  • 15►Rock Bottom Rock Bottom: Rock Bottom will prevent your damage from decreasing, allowing you to keep the highest achieved damage bonus from Dark Arts.
  • 15►Book of Virtues Book of Virtues / 15►Jar of Wisps Jar of Wisps / Beth's Faith Beth's Faith: Wisps cannot be destroyed while Dark Arts is in effect and still deal contact damage.
  • 15►Kamikaze! Kamikaze! will not damage the player while the invincibility effect of Dark Arts is active, making it very useful.
  • 15►Converter Converter can win your run, as you convert one Black Heart into one Black Heart, triggering 15►The Necronomicon The Necronomicon effect each activation. Spamming it will have no consequences on your health, but will deal constant damages to the enemies.
  • 15►Dead Eye Dead Eye has incredible synergy with Dark Arts, as their damage ups combine together, and Dark Arts can never "miss". This allows Tainted Judas to gain a massive damage boost from one cast of Dark Arts, provided he hits enough valid targets with it.
  • 15►Montezuma's Revenge Montezuma's Revenge charge is released when using 15►Dark Arts Dark Arts. This allows for safe use of Montezuma's Revenge.
  • Confusion from 15►Camo Undies Camo Undies will not be removed by Dark Arts, safely allowing you to use it repeatedly in the same room.

Situational Items[]

  • The decision to use projectile-destroying items (15►Halo of Flies Halo of Flies, 15►Psy Fly Psy Fly, etc.) is one that will need to be judged from playthrough to playthrough. For newer players or during a poor run where damage to oneself needs to be minimized, they are very useful during the downtime between Dark Arts activations. However, for more experienced players or during runs where soul/black hearts are plentiful, they can prove to be quite detrimental as they will block projectiles before Tainted Judas touches them, lowering the Dark Arts damage buff.
  • Orbitals that deal high contact damage (such as 15►Cube of Meat Cube of Meat or 15►Sacrificial Dagger Sacrificial Dagger) work well with Dark Arts, as they deal substantial damage while passing through enemy hitboxes, often enough to negate the damage lost from nullified projectiles. However, enemies killed through means other than Dark Arts will not contribute to its damage bonus.
  • Depending on a player's skill level, items that reduce the size of the character's hitbox (Such as 15►Binky Binky, 15►Mini Mush Mini Mush, and the "One makes you small" pill) may start to become less desirable picks, as they can sometimes make bullets and enemies harder to hit.
  • 15►Shade Shade will increase your damage output with 15►Dark Arts Dark Arts, whether it’s been absorbed or not. When it hasn’t been absorbed, it may cause some confusion as to which character you are controlling, as it looks quite similar to Tainted Judas at a glance.

Disfavored Items[]

  • Due to his similar health system, many of the detriments that apply to ??? ??? in regards to health can be applied to Tainted Judas as well.
  • 15►Dead Cat Dead Cat takes away all but one of your black and soul hearts on pick up.
  • 15►Libra Libra should be avoided. The stat-equalizing effect is constantly active, and this weakens Dark Arts in two major ways:
    • It siphons most of the Speed increase during Dark Arts' activation into other stats, most of which are useless as they only benefit tears.
    • Once Dark Arts ends, the damage buff is instead fragmented into various negligible stat bonuses that fall off far too rapidly to be properly utilized.
    • In the same breath, 15►Zodiac Zodiac is also recommended to be avoided as it might just give you Libra at the worst possible time.
  • 15►Lost Soul Lost Soul doesn't go invincible when Dark Arts is used, so it is guaranteed to die because of how Tainted Judas is meant to be played, and thus will never pay out — making it useless.

Unlockable Items[]


  • The achievement for unlocking Tainted Judas, "The Deceiver", may be reference to Judas Iscariot, the disciple who betrayed Jesus Christ, it may also be a reference to the Judas Priest song "Deceiver".
  • The assassin-type design of Tainted Judas, together with the 15►Dark Arts Dark Arts he holds, might be inspired by a (not widely accepted) theory considering that the biblical Judas Iscariot belongs to the Sicarii, a group of Jewish cloak-and-dagger assassins who strongly opposed the Roman occupation of Judea.
    • The Sicarii, named after the word "Sicarius" which means dagger-wielder, are regarded as one of the earliest known organized assassination units of cloak and daggers. Sicarii were known to attack Romans and Roman sympathizers alike with daggers hidden in their cloak, then blending into the crowd after the deed to escape detection. The playstyle of Tainted Judas bears strong resemblance to this, while the sprite of 15►Dark Arts Dark Arts can be a further evidence.
  • Tainted Judas uses a modified version of Dark Judas Dark Judas's sprites, with the only difference being an additional costume that consists solely of the red cross brand and fez.
  • 15►Dark Arts Dark Arts is Dark Judas' starting item in The Binding of Isaac: Four Souls. As expected, the card and the item have entirely different effects.
  • The description of the unlockable Soul of Judas Soul of Judas may be a reference to Meet the Spy, in which the spy says, "Right behind you"



Bug Bug! If Tainted Judas activates 15►Glowing Hour Glass Glowing Hour Glass right after the use of 15►Dark Arts Dark Arts, he will keep the invincible state but unable to fire and interact with trapdoors (Bombs are allowed) until using 15►Dark Arts Dark Arts again, which works similarly to a movable 15►Gnawed Leaf Gnawed Leaf. Other characters with 15►Schoolbag Schoolbag also encounter this issue.
Bug Bug! PC As a likely unintended result of Health Up effects granting black hearts, Converter can be used to activate The Necronomicon's effect endlessly with no health loss, allowing you to quickly deal large amounts of damage by using it repeatedly. (Soul hearts in the last slot will turn into black hearts.)
Bug Bug! Tainted Judas in his 15►Dark Arts Dark Arts state can be affected by 15►Pause Pause, this results in Tainted Judas being stuck in his shadow form whilst not being able to fire any tears as long as 15►Pause Pause is still in effect, this can be fixed by quitting then entering the game again.