Epicure of Blood

Whenever you gain life, each opponent loses 1 life.

Abnormal Endurance

Until end of turn, target creature gets +2/+0 and gains "When this creature dies, return it to the battlefield tapped under its owner's control."

{2}, {T}: Each opponent loses 1 life and you gain 1 life.

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

When Spirit of Malevolence dies, each opponent loses 1 life and you gain 1 life.

Enchant creature
When enchanted creature dies, return that card to the battlefield under your control with a +1/+1 counter on it.

During your turn, Blood Burglar has lifelink.(Damage dealt by this creature also causes you to gain that much life.)