In-game pickup line
“Stab stab stab”
Mechanics
What Mom's Knife does
- The knife deals 2× Isaac's damage while held and reaches 6× damage at one-third charge.
- Charging further extends throwing range rather than raising the damage. The returning knife deals 2× damage.
Achievement #43
How to unlock it
Defeat Satan as Isaac.
Unlocking an item and finding it during a run are separate steps.
Explore more unlocksIn a run
Practical note
A short charge can be enough against nearby enemies; use longer charges when you need the knife to travel farther.
Reference
Game data and sources
The item ID, quality and pool listings, icon, game-file tags, and short pickup line come from the extracted Repentance files. This effect explanation is an editorial summary checked against the references below. Repentance+ can differ.
