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

Added in Afterbirth †

Dull Razor is an unlockable activated item added in The Binding of Isaac: Afterbirth †.


  • Hurts Isaac without taking away health, activating any items that trigger upon taking damage.



For a full list of items that work with Dull Razor, see the list of damage triggered items. Note that any specific extra conditions the items may have for their activation still apply.

  • 15►Blanket Blanket / 15►Holy Mantle Holy Mantle / Wooden Cross Wooden Cross: Absorbs the "hit", wasting both items.
    • Added in Repentance Dull Razor ignores the shield, giving its normal effect without wasting the shield.
  • 15►Bloody Lust Bloody Lust / Added in Repentance15►Bloody Gust Bloody Gust: Especially useful, as all of the stat ups are permanent for the floor.
  • 15►Car Battery Car Battery: Dull Razor activates twice, but "damage" is only dealt once, not triggering synergies a second time.
    • Added in Repentance Dull Razor activates twice, triggering synergies a second time.
  • 15►Cone Head Cone Head: Can block the "hit" Dull Razor inflicts, causing no effect.
  • 15►Crown of Light Crown of Light: Disables Crown of Light for the current room.
  • Added in Repentance 15►Habit Habit: Doesn't charge Dull Razor itself.
    • Habit + 15►Schoolbag Schoolbag: The secondary item will be charged.
    • Added in RepentanceHabit + 15►Car Battery Car Battery: The second activation causes Habit to charge Dull Razor.
  • 15►Isaac's Heart Isaac's Heart: Completely nullifies the effect of Dull Razor.
  • The Lost The Lost / Added in RepentanceTainted Jacob Tainted Jacob / Added in RepentanceTainted Lost Tainted Lost: "Damage" taken from Dull Razor causes no actual harm, allowing full use of the Razor. This is one of the only ways to see the "hurt" animation from these characters.
    • Added in Repentance A character temporarily turned into The Lost by touching a White Fire Place will die from Dull Razor's damage.
  • 15►Purity Purity: Will cancel the current effect of Purity, akin to taking regular damage. Useful for if you want to roll for a different, better effect, but can also get rid of the one you want.

In-game Footage[]


  • The item works almost identically to the Voodoo Pin in Antibirth.


Bug Bug! 15►Habit Habit will charge Dull Razor if Isaac has 15►The Battery The Battery.
Bug Bug! Added in Repentance Dull Razor will kill Isaac in the Mirrored World.

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