Argolyth, the Lich Priest

Flying, deathtouch, menace
Other Zombie creatures you control get +1/+1.
When Argolyth, the Lich Priest enters the battlefield, each opponent discards a card and sacrifices a creature. Put a 1/1 black Zombie
Knight creature token onto the battlefield
and gain 1 life for each creature card put into
the graveyard this way.