Blood Bag
ItemRebirthLocked
passiveGame ID 119★★★★
How do you unlock Blood Bag?
In The Binding of Isaac, Blood Bag is unlocked by unlocking Blood Bag (Achievement).
Structured pathSource-backed requirements are mapped into trackable steps.
Grants one filled Red Heart container, restores [Before Repentance] 4 / [Repentance] 5 Red Hearts, and increases speed by 0.3.
How to unlock: Use the Blood Donation Machine 30 times
What unlocking Blood Bag leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13