Saraphena, Murderous Heiress

Lifelink, hexproof from instants
Murderous Ascension (Whenever Saraphena deals combat damage to a player, create a 2/2 black Vampire creature token with lifelink. Then, if you control five or more Vampires, you may destroy target creature an opponent controls.)
Bloodied Nobility (Whenever another Vampire you control dies, put a +1/+1 counter on Saraphena.)

"I inherited a legacy of power and cruelty. I will use both
to reshape the night to my will."