Lorelei, Night Stalker

+1: Put a 1/1 black Vampire creature token with lifelink and haste on the battlefield.
+2: You may sacrifice a Vampire, when you do, Lorelei, Night Stalker deals 3 damage to any target and you gain 3 life.
-7: Lorelei, Night Stalker deals 13 damage to any target, you gain 13 life.