Blood Oath
ItemRepentanceUnlocked
passiveGame ID 569★★★★
How do you unlock Blood Oath?
Verified starting unlockSource data confirms that no unlock is required.
Stabs Isaac at the beginning of each floor, draining his Red Hearts. Increases damage and speed for the floor based on the amount drained.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Blood Oath leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13