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

Added in Repentance

Sumptorium is an activated item added in The Binding of Isaac: Repentance. It is available exclusively for Tainted Eve Tainted Eve as her starting item.


  • Holding down the fire button will create blood clot familiars every two seconds and drain half a heart. This is indicated by a red charge bar, similar to that of Maw of the Void Maw of the Void.
    • Blood clot familiars mimic Tainted Eve's movement (including flight), firing, and tear effects.
      • Blood clot familiars will mimic many (all?) tear-altering items, such as Spirit Sword Spirit Sword.
      • Holding down the swap button allows Tainted Eve to move independently from the blood clots.
    • The familiars have health and will be destroyed if they take enough damage. They are immune to hazards such as spikes, fire places, and lasers.
      • Enemies deal 1 point of contact and projectile damage to them when hit.
      • Isaac's bombs and troll bombs deal 2 points of damage.
    • Draining health does not count as taking damage, so creating familiars will not trigger damage-activated effects.
  • Each type of heart generates a different type of blood clot:
Heart Appearance Health Damage Tear effect
Red Heart.png Sumptorium red familiar.png 3 35% n/a
Soul Heart.png Sumptorium soul familiar.png 4.5 35% n/a
Black Heart.png Sumptorium black familiar.png 3 43% Dark Matter Dark Matter
Eternal Heart.png Sumptorium eternal familiar.png 3 52% Sacred Heart Sacred Heart
Gold Heart.png Sumptorium golden familiar.png 3 35% Midas' Touch Midas' Touch (scales with luck)
Bone heart.png Sumptorium bone familiar.png 3 35% Compound Fracture Compound Fracture
Rotten Heart.png Sumptorium rotten familiar.png 1.5 35% n/a
  • Upon activation, Sumptorium destroys any remaining blood clots and heals Tainted Eve for the same type of hearts that were used to generate them. The blood clots deal 3x Tainted Eve's damage to enemies they pass through as they return.
    • Should Tainted Eve have more blood clots than room in her health bar when doing this, a red blood stream will appear on her for each excess blot clot. This provides a very brief opportunity to create a blood clot free of charge, without draining any health, after which the stream disappears.


Note: While Sumptorium is technically unlockable, it currently does not appear in any item pools, making it unobtainable for any character other than Tainted Eve Tainted Eve, without using mods or the Debug Console.

  • Box of Friends Box of Friends: Cannot be used to duplicate clots.
  • Car Battery Car Battery: No interaction.
  • Lil Clot Lil Clot: The clot spawned by this trinket is its own separate clot variant although it functions the same as the red one. As such, it cannot be absorbed by Sumptorium.
  • Maggy's Bow Maggy's Bow: Does not provide additional healing when absorbing clots.
  • My Reflection My Reflection: Clots' tears will be redirected to Isaac instead of returning back to them.
  • Void Void: Absorbing this item will consume all clots made earlier, but will not generate new clots.
  • The Forgotten The Forgotten: Clots made by Sumptorium will have a bone club as well. 2 red clots and 1 bone clot can be made with each full bone heart.
    • The active character will create clots, leaving the other character's health intact.
    • Switching to The Soul The Soul can be used to create extra soul clots, and they will switch between the bone club and firing tears normally as well.
    • In order to stop clots from moving while playing as The Forgotten The Forgotten, it is needed to hold down Left CTRL/RT while switching to The Soul The Soul, and vice-versa.
    • Clots created while having the boomerang attack charged will instantly swing their bone, then hold their bone club like The Forgotten The Forgotten does in the opposite direction until throwing their bone.
  • Tainted Forgotten Tainted Forgotten: Clots made by Sumptorium have a club too, but they are commanded by Tainted Soul Tainted Soul, making it the only way to attack while moving freely.
  • Keeper Keeper/Tainted Keeper Tainted Keeper: Clots made by Sumptorium will be red, and can not be consumed after using Sumptorium, but the clots have triple/quadruple shot respectively. Sumptorium will drain half a coin heart which is not usually seen for these characters.
  • Bethany Bethany/Book of Virtues Book of Virtues: It will create red wisps for every clot consumed, and they will disappear if she starts creating clots again. Soul charges cannot be used to create wisps.
  • Jacob and Esau Jacob and Esau: Sumptorium will only affect the brother whom it was given. Both brothers will generate clots at the same pace if given to both, but will only consume the clots from the brother that used the item.
  • Tainted Magdalene Tainted Magdalene: Making clots drains Magdalene's health much quicker, and at 12 red hearts, it will only absorb most of the hearts due to the character's unique ability.
  • Tainted Samson Tainted Samson/Berserk! Berserk!: Clots made by Sumptorium will have a donkey jawbone while berserking too.
  • Tainted Azazel Tainted Azazel: Clots made by Sumptorium will have an even thinner Brimstone Brimstone attack, and will sneeze too.
  • Lazarus Lazarus/Revival Items: Clots will be retained after losing the extra life.
  • The Lost The Lost/Tainted Lost Tainted Lost: Unable to create clots, rendering this item useless.
  • Tainted Lazarus Tainted Lazarus: Sumptorium will only start making clots depending on which version it was given. You can give Dead Tainted Lazarus Dead Tainted Lazarus's health to Tainted Lazarus Tainted Lazarus after using Flip Flip just after using Sumptorium.
  • Tainted Eden Tainted Eden: Clots made by Sumptorium are retained permanently after taking damage.



  • While Sumptorium is technically unlockable by beating Delirium as Tainted Eve Tainted Eve, it does not appear in any item pools, making it unobtainable in normal play.
    • Sumptorium can be obtained using mods or the Debug Console, and works as expected.
  • The type of heart drained first is decided by the following order: Golden Hearts, Eternal Hearts, Rotten Hearts, Red Hearts, then the rightmost Soul, Black, or Bone Hearts.
  • Clots from a previous run will carry over during a RERUN.
  • Sumptorium can't spawn more than 64 clots at once.
    • This limit is shared with blue flies and blue spiders. If there are multiple flies, spiders and clots on the screen at the same time, the limit will be 32 for the clots and 32 for the flies/spiders.
  • Sumptorium cannot absorb more than 29 clots at once.
  • Activating Sumptorium does not restore Tainted Eve's health immediately, as it is not restored until the recalled blood clots return to Eve.
  • If the player obtains flight, the clots will hover instead of lay down on the floor.

In-game footage[]



  • A Sumptorium is a metal drinking straw used in the Roman Rite to receive the Blood of Christ in Holy Communion.
  • Even though Tainted Eve wields a Sumptorium-like weapon when left on half a heart and all blood clots are destroyed, this is not an effect given by the Sumptorium item itself and is a character-specific trait.