Rasturim, Astral Devourer

Flying, Deathtouch, Lifelink, Haste
When Rasturim, Astral Devourer enters the battlefield, target opponent sacrifices a creature.
You may put a creature sacrificed this way onto
the battlefield under your control. That creature
is a Vampire in addition to its other types.
{1}{b}{r}, Sacrifice a Vampire you control:
Rasturim, Astral Devourer gains +3/+3 until end
of turn.