Binding of Isaac: Rebirth Wiki

Razor Blade is an unlockable activated item.

Effects[ | ]

  • On use, damages Isaac for a full heart of health and grants +1.2 damage for the current room.
    • Razor Blade takes Red HeartRed Hearts before other heart types.
    • (in Repentance) When used more than once in the same room, damage taken is lowered to half a heart.

Notes[ | ]

  • (except in Rebirth) Character Eve iconEve starts with this item after unlocking it and donating 439 coins to the Greed Donation MachineGreed Donation Machine.
    • (except in Repentance) Both conditions must be met for Eve to hold it; donating 439 coins before defeating Boss Satan ingameSatan with Eve will wrongly state on Eve's profile on the Character Selection Screen that she has it equipped.
    • (in Repentance) Eve starts with the Razor Blade if unlocked from the Greed Machine, even if Satan has not been defeated with Eve.
  • (except in Repentance) If Isaac has half a red heart left, Razor Blade will damage other heart types.
  • It is possible to die using Razor Blade if Isaac does not have enough hearts.
  • The effect stacks with itself and Red PatchRed Patch, which provides a similar benefit.
  • Using this item does not affect Devil RoomDevil Room/Angel RoomAngel Room chances.
  • Using the Razor Blade grants immunity frames; this allows access to Curse RoomCurse Rooms without losing soul hearts.
  • (except in Rebirth) Using this item in the Boss Ultra Greed ingameUltra Greed boss room will remove 2-4 coins and drop 1-3 pennies on the floor, as if Isaac was hit by an enemy attack.
  • Using this item as Character The Lost iconThe Lost will kill The Lost, even if the protective effect from Collectible Holy Mantle iconHoly Mantle is still active.

Synergies[ | ]

Interactions[ | ]

  • (except in Rebirth)Collectible Car Battery iconCar Battery: No effect.
  • Collectible Holy Mantle iconHoly Mantle / Similar effects: The shield is not broken, but Razor Blade still damages Isaac.
  • (in Repentance) Shield / Invulnerability: Will not protect against this item's damage.
  • (in Repentance) Character Tainted Samson iconTainted Samson / Collectible Berserk! iconBerserk!: The Razor Blade can be used in order to gain a massive damage boost in a room as long as there's a source of HP within reach.

In-game Footage[ | ]

Trivia[ | ]

  • This item is used in Darkness Falls (challenge #4).
  • The item itself is a reference to the act of cutting one's self, usually at the wrists, to inflict self-harm or to commit suicide by loss of blood.
  • Isaac's appearance after using the item is just like the DopleDople.
  • In the original The Binding of Isaac, Razor Blade was unlocked by defeating Boss Mom's Heart ingameMom's Heart/ Boss It Lives ingameIt Lives as Character Eve iconEve.

Bugs[ | ]

Bug Bug! As Eve, there is a very unlikely chance that using this to activate Whore of Babylon will not activate it, despite being at the correct health to do so.

Gallery[ | ]