Rainbow Baby
ItemRebirthUnlocked
familiarGame ID 174★★★★
How do you unlock Rainbow Baby?
Verified starting unlockSource data confirms that no unlock is required.
Spawns a familiar that follows Isaac around and fires tears with random effects.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Rainbow Baby leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13