Rankle, Pitiless Trickster

Legendary Creature — Faerie Rogue1/3

Flying Rankle has lifelink and haste as long as an opponent controls no creatures. When Rankle enters, you may pay 1 life. When you do, each player discards a card and sacrifices a creature. Whenever a player discards a card, Rankle perpetually gets +1/+0.

Not legal in Commander