Revolver

When Revolver enters the battlefield equip it to a
cowboy, if you don't control one, you may search
your library for a cowboy, and put it onto the battlefield tapped. When an equipped creature dies,
blink Revolver.

Equipped creature gets:
-Vigilance, Myriad 3, Annihilator 1
-{t}: Deal X damage to any target, where X is how
many creatures have died this turn.