Blood Siphon

Target creature gets -X/-X until end of turn, where X is its toughness. Create an X/X black Horror creature token with haste. It has all abilities of that creature. Sacrifice the token at
the beginning of your next end step.
Flashback - {3}{b}{r}, Tap an untapped Vampire creature you control. (You may cast this card from your graveyard for its flashback cost. Then exile it.)