Alucard, First of his kind

Haste, Flying
Alucard, First of his kind enters the battlefield
with X +1/+1 counters, where X was the number
of creatures sacrificed to transform Alucard, First
of his kind.
Vampire creatures you control have wither.
If a creature an opponent dies with a -1/-1
counter on it, return it to the battlefield under
your control as a black vampire .