White Sun's Nadir

({p/u} can be paid with either {u} or {1} and 1 life.)
If {u} or {r} were spent to cast this spell, draw 4
cards, then discard 2 cards. If {b} or {g} were spent
to cast this spell, return up to two target creature
cards from your graveyard to your hand.
If at least 4 white mana was spent to cast this
spell, instead, choose up to one creature.
Destroy the rest.