The Mark
ItemRebirthUnlocked
passiveGame ID 79★★★★
How do you unlock The Mark?
Verified starting unlockSource data confirms that no unlock is required.
[Before Repentance] Grants one Soul Heart, +1 damage, and +0.2 speed. / [Repentance] Grants one Black Heart, +1 damage, and +0.2 speed.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking The Mark leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13