Whenever one or more Vampires you control attack, create a Blood token (A Blood token is an artifact with ", , Discard a card, Sacrifice this artifact: Draw a card."). , , Pay 1 life: Create a 1/1 white and black Vampire creature token with lifelink (Damage dealt by the creature also causes its controller to gain that much life.). , , Sacrifice Glass-Cast Heart and thirteen Blood token (A Blood token is an artifact with ", , Discard a card, Sacrifice this artifact: Draw a card.")s: Each opponent loses 13 life and you gain 13 life.