Cruel Celebrant

Whenever Cruel Celebrant or another creature or planeswalker you control dies, each opponent loses 1 life and you gain 1 life.

Epicure of Blood

Whenever you gain life, each opponent loses 1 life.

Squire's Devotion

Enchant creature
Enchanted creature gets +1/+1 and has lifelink.
When Squire's Devotion enters the battlefield, create a 1/1 white Vampire creature token with lifelink.

Skymarch Bloodletter

Flying
When Skymarch Bloodletter enters the battlefield, target opponent loses 1 life and you gain 1 life.

Queen's Commission

Create two 1/1 white Vampire creature tokens with lifelink.

Murder

Moment of Craving

Target creature gets -2/-2 until end of turn. You gain 2 life.

Moment of Heroism

Target creature gets +2/+2 and gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.)

Blood Burglar

As long as it's your turn, Blood Burglar has lifelink. (Damage dealt by this creature also causes you to gain that much life.)

Manalith

Call to the Feast

Create three 1/1 white Vampire creature tokens with lifelink.

True Love's Kiss

Exile target artifact or enchantment.
Draw a card.