Reverie of the Gods

Penance - When this spell is cast, you may sacrifice
any number of creatures. Each creature sacrificed
lowers the casting cost of this spell by {1}.
Exile all creature cards from all graveyards. For
each creature card exiled from a player's
graveyard, that player may put that many God's
Chosen token creatures into play (God's Chosen is
a 4/4 Flying Angel that is White).
'Only the Gods can answer our prayers' - Rodrigo