Zerahal, the First Griffin

When Zerahal enters the battlefield, sacrifice it
if it didn't escape.
Whenever Zerahal enters the battlefield or
attacks, you gain 3 life and create a 3/3 green
and white Griffin creature token with flying,
first strike, and vigilance.
Escape—{g}{g}{w}{w}, Exile five other cards
from your graveyard. (You may cast this card
from your graveyard for it's escape cost.)