Mercurius
ItemRepentanceUnlocked
passiveGame ID 590★★★★
How do you unlock Mercurius?
Verified starting unlockSource data confirms that no unlock is required.
+0.4 speed. Doors stay open after entering a room, even in rooms with enemies.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Mercurius leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13