Rankle, Pitiless Trickster is a mythic Legendary Creature — Faerie Rogue card from Alchemy: Outlaws of Thunder Junction (YOTJ), collector number 11.
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.