Grendel, Insatiable Hunger

Trample

Whenever Grendel enters or attacks, exile target nonland permanent an opponent controls until Grendel leaves the battlefield.

{4}{b}{g}, {t}: Put each permanent which Grendel exiled into the graveyard, then put a number of +1/+1 counters on Grendel equal to the combined mana value of permanents put into the graveyard this way.