Rainbow Worm
TrinketAfterbirthUnlocked
How do you unlock Rainbow Worm?
Verified starting unlockSource data confirms that no unlock is required.
Isaac's tears gain a worm effect that changes every 3 seconds.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Rainbow Worm leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13