Rusted Key
TrinketRebirthUnlocked
How do you unlock Rusted Key?
Verified starting unlockSource data confirms that no unlock is required.
Increases the chance of Keys dropping after clearing a room, and the chance of finding keys when opening a Chest.
Available from the start
No unlock needed — this is available in every new save file.
What unlocking Rusted Key leads to
Nothing depends on this yet.
Source: bindingofisaacrebirth.wiki.gg
Imported 2026-09-13