Avacyn, Pulled From Eternity

Flying, vigilance
You may cast Avacyn from exile by paying 8 life
in addition to it's cost.
When Avacyn attacks, for each opponent create a
4/4 white Angel creature token with flying and
lifelink tapped and attacking that player.
{2}{w}{b}, Exile two Angels you control: Return
Avacyn from the graveyard to the battlefield
tapped under your control.