Sengir's Command

Put a -1/-1 counter on target non-Vampire
creature. Regenerate target black creature.
Feint (You may cast this card face down as a 2/2 colorless creature for {3}. If this creature attacks and
isn't blocked, you may activate the following ability):
Tap an untapped Vampire you control, Sacrifice Sengir's Command: Destroy any nonartifact,
non-Vampire creature.