Dauthi Voidwalker

Shadow (This creature can block or be blocked by
only creatures with shadow.)

If a card would be put into an opponent's graveyard
from anywhere, instead exile it with a void counter
on it.
{t}, Sacrifice Dauthi Voidwalker: Choose an exiled
card an opponent owns with a void counter on it.
You may play it this turn without paying its mana
cost.