Razor Blade

Razor Blade Icon

In-Game Appearance

Tears Appearance


Item Type

Activated Collectible

Pickup Quote

Space to use


Collection Grid:

Recharge Time:

Unlocked By:
Complete The Womb with Eve

A silver, sharp razor blade.


Allows trading hearts for more damage in the current room upon each activation.

Isaac pays a full heart in normal state but half a heart while recovering from damage (Isaac blinking). Basic Damage is increased by 1.2. Final Damage increment on each use decreases with the number of repeated usages because of the square root "soft cap" in the damage formula.

Pays Soul Hearts if Isaac has less than one full Red Heart. Otherwise, it takes Eternal Hearts first, then Red Hearts.


  • Items that grant temporary invulnerability like Celtic Cross or The Polaroid allows unlimited usage of Razor Blade for free while invulnerable, granting a huge damage boost. Very helpful when fighting late game bosses.


  • In The Womb and all levels onwards:
    • Heart price doubles
    • Moreover, if Isaac has just enough Red Hearts for the trading and some spare Soul Hearts, it doesn't utilize those Soul Hearts but uses up all the Red Hearts, thus killing Isaac. A remedy is to always keep a half damaged Red Heart container.
  • See also: Scapular's Bugs section


  • Using the Razor Blade will not count as damage for 'No-Damage-Runs'.
  • According to Edmund in this video, using the Razor four times results in double damage for that room.


  • After using this item, Isaac looks like a Dople.


Related AchievementsModifier

Fichier:TheRazorBlade.jpg "The Razor Blade" - Kill Mom's Heart with Eve.
de:Razor Blade