Blood Artist

Whenever Blood Artist or another creature dies, target player loses 1 life and you gain 1 life.

Vindictive Vampire

Whenever another creature you control dies, Vindictive Vampire deals 1 damage to each opponent and you gain 1 life.

Whenever you gain life, target opponent loses that much life.
{3}{B}{B}: Creatures you control gain lifelink until end of turn.

Whenever you gain life, target opponent loses that much life.

Whenever an opponent loses life, you gain that much life.

Flying
Whenever Butcher of Malakir or another creature you control dies, each opponent sacrifices a creature of their choice.