The Blood God

First Strike
Eminence:
Whenever a creature you control is sacrificed, you get 1 "Pure Blood"-Counter.
Sacrifice a creature you control:
You get 1 "Pure Blood"-Counter, The Blood God gets +2/+2 until end of turn.
The Blood God can`t be sacrificed.
The Blood God costs {1} less to cast for each "Pure Blood"-Counter you have.