As an additional cost to cast this spell, sacrifice a creature.
Draw three cards.
You must sacrifice exactly one creature to cast Blood Divination; you canâ€™t cast it without sacrificing a creature, and you canâ€™t sacrifice additional creatures.
Players can respond only after Blood Divination has been cast and all its costs have been paid. No one can try to destroy the creature you sacrificed to prevent you from casting this spell.