Sacrifice X Zombies, then reveal cards from the top of your library until you reveal a number of Zombie creature cards equal to the number of Zombies sacrificed this way. Put those cards onto the battlefield and the rest on the bottom of your library in a random order.
+1: Reveal the top card of your library. If it’s a creature card, put it into your hand. Otherwise, put it on the bottom of your library. −2: Target creature you control deals damage equal to its power to another target creature. −7: Until end of turn, creatures you control gain “You may have this creature assign its combat damage as though it weren’t blocked.”