Bone Spurs
ItemRepentanceLocked
passiveGame ID 683★★★★
How do you unlock Bone Spurs?
In The Binding of Isaac, Bone Spurs is unlocked by earning the Mother completion mark as The Forgotten (Character).
Structured pathSource-backed requirements are mapped into trackable steps.
Enemies spawn floating bones on death, which block shots and damage/repel enemies that touch them.
- Defeat Hush 3 times to unlock A Secret Exit. source
- After A Secret Exit is unlocked, a locked door to Downpour appears after completing Basement/Cellar/Burning Basement I or II. source
- Collect Knife Piece 1 in Downpour/Dross II. source
- Collect Knife Piece 2 in Mines/Ashpit II. source
- After defeating Mom in Mausoleum/Gehenna II, stab the flesh door that appears with the knife familiar to open it. source
- Defeat the Mausoleum version of Mom's Heart behind the flesh door, then reach Corpse II and defeat Mother. source
What unlocking Bone Spurs leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13