Lord Marrowgar

When Lord Marrowgar enters the battlefield,
exile up to 7 cards from your graveyard. For each
one exiled this way, deal one damage to any
opponent.
When Lord Marrowgar leaves the battlefield, you
may pay {4}{u}{b}. If you do, exile up to 7 cards
from an opponents graveyard and deal 1 damage
to them for each card exiled this way.