Blood of the Martyr
ItemRebirthUnlocked
passiveGame ID 7★★★★
How do you unlock Blood of the Martyr?
Verified starting unlockSource data confirms that no unlock is required.
+1 damage. Isaac shoots blood tears.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Blood of the Martyr leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13