Moonstone Ritual

As an additional cost to cast this spell, sacrifice a creature and pay 2 life.

Search your library for up to two Vampire or Werewolf cards, reveal them, and put them into your hand. Then shuffle.
If a Human was sacrificed to cast this spell, you may put one of those cards onto the battlefield instead.

“The stone chooses. The blood obeys. And the curse bends… if only for a moment.”