Number Two 
Effects
- Continuously firing tears for 3 seconds causes Isaac to drop a free
Butt Bombs bomb. Only 1 Butt Bomb can be dropped per charging cycle, so it is required to stop firing and then charge again to drop another Butt Bomb. Taking Damage will interrupt the cycle.
- More precisely, a bomb is dropped by holding any fire button/direction for 3 seconds, and as such the effect is also triggered by charging or directly controlled attacks.
- (Added in Repentance) There is a visual fart effect whenever a Butt Bomb is placed.
- (Added in Repentance) This item belongs to the Oh Crap set. Collecting three items from this set will transform Isaac into a walking pile of poop.
Notes
- Essentially grants unlimited bombs, as the charge time can be repeatedly reset to bomb tinted rocks and to get into Secret and Super Secret Rooms.
- Increases difficulty of poop-themed bosses such as Dingle, as Butt Bombs restore 25% of maximum HP to the bosses when they explode.
- The spawned butt bombs will be affected by bomb modifiers, excluding
Mr. Mega.
Interactions
Remote Detonator: Bombs placed by Number Two will not explode until Remote Detonator is activated.