Arras, Titan of Wild's Rising

When Arras enters the battlefield, sacrifice it unless
it escaped.
Whenever Arras enters the battlefield or attacks,
create two 1/1 green and white Elemental creature
tokens with lifelink and vigilance.
Escape—{g}{g}{w}{w}, Exile five other cards from
your graveyard. (You may cast this card from your graveyard for its escape cost.)