Canaan, Cursed Descendant

Whenever Canaan attacks or blocks, you may pay {1}{b}{g}. If you do, choose one—
•Put a -1/-1 counter on each creature defending
player controls.
•Create a 2/2 black and green Zombie creature
token with "Whenever this creature dies, each opponent loses 1 life."
•Sacrifice another creature. If you do, Canaan
gets +X/+X until end of turn, where X is the sacrificed creature's power