Bullet in a Jar is a passive item in Benighted Soul, a mod for The Binding of Isaac.

On pickup + 5 keys.

While held Double-tapping costs 5 keys, and fires a piercing key tear with 500% damage, which spawns 5 keys when fallen.

Can not be triggered when Key pickups are more than keys held.

Bullet in a Jar can be found in the following item pools:

The following tags are applied to this item:

The following special synergies and interactions for Bullet in a Jar have been documented.

* Note that not all possible synergies and interactions are listed here.

This is a reference to Rocket in a Jar.

• Download Benighted Soul from the Steam Workshop.