The Nightgifter

Creatures your opponents control have Undying (When a creature with undying dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)
Remove a +1/+1 counter from a creature you don't control: Choose one—
•You draw 2 cards and gain 2 life
•Target player discards 2 cards and loses 2 life