Call of Tibia

Whenever one or more Vampires you control
attack, create a Blood token. (It's an artifact with
"{1}, {t}, Discard a card, Sacrifice this token: Draw
a card.")

{b}, {t}, Pay 1 life: Create a 1/1 white and black
Vampire creature token with lifelink.

{b}{b}, {t}, Sacrifice Call of Tibia and thirteen Blood
tokens: Each opponent loses 13 life and you gain 13
life.