Shard of Glass
ItemAfterbirth+Unlocked
passiveGame ID 448★★★★
How do you unlock Shard of Glass?
Verified starting unlockSource data confirms that no unlock is required.
[Before Repentance] Upon taking damage, Isaac has a chance to drop a full red heart, gain 5 range, and leave a trail of damaging red creep for the current room. / [Repentance] Taking damage causes Isaac to bleed, spraying a volley of blood in the direction he fires. Bleeding will eventually damage him, but it can be stopped by picking up a Red Heart.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Shard of Glass leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13