Kelter, Lord of the Alter

This creature enters the battlefield with Key
count of 4 (Whenever this creature deals combat
damage to an opponent, up the Key count by 1.)
Key 1-4•Create a Treasure token.
Key 5-8•Create two 1/1 black Phyrexian creature tokens with Infect.
Key 9-11•Destroy target nonblack creature.
Key 12{bull}Exile Kelter until the beginning of the
next endstep.