Binding of Isaac: Rebirth Wiki
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(in Repentance)

Blood Bombs is a passive item added in The Binding of Isaac: Repentance.

Effects[ | ]

  • Grants one full Red Heart container.
  • Restores 4 Red HeartRed Hearts.
  • Causes Isaac's BombBombs to leave a pool of red creep on the ground when they explode.
    • The creep deals 2 damage per tick (20 per second) and lasts 15 seconds.
    • Leaves one large creep in the middle, and four small creeps on random direction and distance.
      • Multiple creeps do not inflict damage on an enemy simultaneously.
  • If Isaac has no bombs, allows him to place a bomb at the cost of taking half a heart of damage. This prioritizes Red HeartRed Hearts over Soul HeartSoul Hearts.

Notes[ | ]

  • Placing a bomb using health counts as self-damage, and as such, does not affect the chances for a Devil deal, does not trigger Collectible Damocles iconDamocles, nor does it reroll Character Tainted Eden iconTainted Eden.
  • Character Keeper iconKeeper / Character Tainted Keeper iconTainted Keeper will take 1 Coin Heart of damage in exchange for 1 bomb.
  • Character Tainted Bethany iconTainted Bethany can use 1 blood charge in exchange for 1 bomb.
  • You can remain at zero bombs and leave excess drops of bombs and hearts to maximize resource use for the floor.
  • Placing a bomb using health can let Isaac enter/exit a Curse RoomCurse Room without taking soul/black heart damage.
    • But be careful and remember to move quickly upon exiting the Curse room, otherwise you'll take damage from the previous bomb.

Syngergies[ | ]

Interactions[ | ]

Trivia[ | ]

  • Blood Bombs originates from the Antibirth mod. In Antibirth, Blood Bombs would only heal four hearts and the creep would not be produced if the bomb was eaten by bosses like Boss Chub ingameChub.
  • This is the only bomb-augmenting item that does not give any BombBombs on pickup.
    • The fact that the item gives a heart container and healing instead of bombs may be a hint for the mechanic of using health for bombs, as well as a substitute for actual bombs.
    • The fact that the item heals 5 hearts may be a reference to many bomb effect items (such as Collectible Butt Bombs iconButt Bombs) that gives Isaac 5 bombs.
  • The fact that the item gives a heart container and heals up to exactly 5 containers, along with the appearance, makes it very similar to Collectible Blood Bag iconBlood Bag.
  • A Blood Donation MachineBlood Donation Machine will be shown as a cause of death on Isaac's last will if he dies as a result of placing a bomb and losing all health.


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