Falk, Reverent of Rats

Attacking Vampires you control get +1/+0 for
each rat creature you control. Whenever one or
more Vampires you control deal Combat damage
to a Player, Create a Blood Token.
{2}, Sacrifice a Blood Token: Create a 1/1 Black
Rat Creature token with Fear.
"Saved and Fallen, Sacrifice The Blood of Bats"