Carnage Wyrm

Flying
Whenever a non-Zombie creature dies, you
may pay {1}{b}{r}{g}. If you do, return it to the
battlefield under its owner's control. It is a
Zombie in addition to its other types. Until your
next turn, whenever Carnage Wyrm blocks, it
gets -3/+X until end of turn, where X is the
returned creature's mana cost.