Parthur, Lesser Evil

: When Parthur, Lesser Evil enters the battlefield, create X 1/1 black warlock creature token.
+1: sacrifice target warlock creature. create a 4/4 black creature token demon with "Can't damage or block white creatures"
-3: cause 3 damage to target. If it is a demon, add 3 +1/+1 to target instead and deal 1 damage to its controler