Mr. Key is a passive item in Benighted Soul, a mod for The Binding of Isaac.

On pickup + 1 key.

Mega Chest needs only 1 key.

Key Beggars have 50% chance to return keys. (Including Key Master, Key Bum and Super Bum)

Mr. Key can be found in the following item pools:

The following tags are applied to this item:

This is a reference to Mr. Boom.

• Download Benighted Soul from the Steam Workshop.