Bob's Bladder
TrinketAfterbirthUnlocked
How do you unlock Bob's Bladder?
Verified starting unlockSource data confirms that no unlock is required.
Leaves a pool of green creep under all Bombs Isaac places, which damages enemies that walk over it.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Bob's Bladder leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13