The Bloody Doll is a unique weapon that only Omega can use. it is a syringe like hand gun that creates ammo from the users blood and brain cells. It's trigger only affects the blood draw, the firing is voice activated, allowing 7 levels of power. It has been proven, that with repeated use, the IQ of the user will lower.
Omega is seen using this weapon, only once, at the end of his fight with XV. He draws a full tank from himself, and fires uses a level 4 shot, forcing XV to make a tortoise shell shield, during which Omega rushes up, and stabs him in the back with his Loner.