Fragment of Heavenly Father

You may not cast this unless your devotion to
white is more than five. This spell may not be
countered.
Each nonland card in your graveyard has
escape. The escape cost is equal to the card's
mana cost plus exile two other cards from your
graveyard. (You may cast cards from your
graveyard for their escape cost.) At the
beginning of the end step, sacrifice Fragment
of Heavenly Father.