Betrayer's Shield

 is a gun. Upon reloading, it leaves a protective shield on the ground, which blocks enemy bullets (but not the player's). Only one such shield can exist at any time. The shield is destroyed after taking too much damage or upon leaving the room.

Bugs

 * If the player duct tapes a beam weapon to, uses it until it runs out of ammo, drops Lies, then drops the gun, it will turn into a pistol and can no longer be picked up.