Grask, Titan of Earth's Hold

When Grask enters the battlefield, sacrifice it unless
it escaped.
Whenever Grask enters the battlefield or attacks,
you may return a nonland permanent card with
mana value 2 or less from a graveyard to the battlefield under your control.

Escape-{b}{b}{g}{g}, Exile five other cards from your
graveyard. (You may cast this card from your
graveyard for its escape cost.)