A bloody knife, with a red handle.
The knife orbits Isaac, doing very high damage to any monster it touches. It is supposed to block tears, but often does not due to a bug.
- Book Of Shadows - Allows you to do high damage to enemies without taking damage.
- Works well with Guardian Angel
- This item's sprite is the same as Mom's Knife, but flipped upside down with blood on the blade and a red handle.
- The in-game secret message refers to it as "Sacrificial Knife"