- After clearing a room, adds a chance to spawn a friendly Bony.
- The chance scales with Luck, maxing at around ~50% at 51 luck.
- Eraser: Bonies erased by Eraser will never spawn again, greatly diminishing the value of Polished Bone. If Black Bonies are also erased, Polished Bone becomes useless.
|Tainted Forgotten Unlocks|
|Isaac (Boss) Unlocks|
|The Lamb Unlocks|
|??? (Boss) Unlocks|
|The Binding of Isaac: Rebirth|
|Achievements||Attributes||Bosses||Cards and Runes||Challenges||Chapters|