XI - Strength
CardRebirthUnlocked
How do you unlock XI - Strength?
Verified starting unlockSource data confirms that no unlock is required.
Grants the effects of Magic Mushroom (minus the health restoration) for one room. The added Red Heart container is not removed if doing so would kill Isaac.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking XI - Strength leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13