Alora, Cheerful Thief is a uncommon Legendary Creature — Halfling Rogue card from Alchemy Horizons: Baldur's Gate (HBG), collector number 5u.
Whenever you attack, up to one target attacking creature can't be blocked this turn. At the beginning of the next end step, return that creature to its owner's hand. If you do, a creature of your choice an opponent controls perpetually gets -1/-0.