Rusted Key is a trinket.
Effects[ | ]
- Gives a 10% chance of changing the room drop reward to a
Key.
- Gives a 33% chance of adding a key to the rewards from opening certain Chests, or destroying Tinted Rocks, certain Machines, and certain Beggars.
- Other than Tinted Rocks, these can only drop the key if they drop coins, hearts, Bombs, or Keys.
- This includes:
- This excludes:
[ | ]
Trivia[ | ]
- In the original Binding of Isaac, this trinket was broken and didn't do anything.[1]
References[ | ]
Keys 
The Binding of Isaac: Rebirth
