Parasitoid
ItemAfterbirth+Unlocked
passiveGame ID 461★★★★
How do you unlock Parasitoid?
Verified starting unlockSource data confirms that no unlock is required.
Adds a chance to fire an egg sack which creates slowing creep and spawns 1-2 Blue Flies or Blue Spiders upon hitting an enemy.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Parasitoid leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13