Feather, Radiant Arbiter is a mythic Legendary Creature — Angel card from Murders at Karlov Manor Commander (MKC), collector number 313. Current market price: $1.19 (foil $0.97), TCGplayer market prices via Scryfall.
Flying, lifelink Whenever you cast a noncreature spell that targets only Feather, you may choose any number of other creatures that spell could target and pay {2} for each of those creatures. If you do, for each of those creatures, copy that spell. The copy targets that creature. (Copies of permanent spells become tokens.)