Whenever one or more Vampires you control attack, create a Blood token.
(It's 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.
,
, Sacrifice Glass-Cast Heart and thirteen Blood tokens: Each opponent loses 13 life and you gain 13 life.