Drift of Phantasms is a common Creature — Spirit card from Ravnica: City of Guilds (RAV), collector number 46. Current market price: $0.61 (foil $15.71), TCGplayer market prices via Scryfall.
Defender (This creature can't attack.) Flying Transmute {1}{U}{U} ({1}{U}{U}, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)