Alucard, The Bird of Hermes

Eminence - Whenever you cast another Vampire spell, if Alucard, The Bird of Hermes is in the command zone or battlefield, create a blood token

Vigilance, Ward —Sacrifice a permanent

Whenever a vampire attacks, you may sacrifice two blood tokens. If you do, you may put a vampire from your hand on the battlefield tapped and attacking.

{10}{p/r}{p/c}{p/b}: Exile Alucard, The Bird of Hermes and return it to the battlefield transformed under it's owner's control