Fire Rebirth

As an additional cost to cast this spell, sacrifice a
creature and you lose 6 life.
Return three target creatures cards from your
graveyard to the battlefield facedown as 2/2's. You
may flip them face up any time for paying their
mana cost.
"Ser Jorah, bind this woman to the pyre. It is not
your screams that I want . . . only your life."
—Daenerys Targaryen