Waterfall Aerialist is a common Creature — Djinn Wizard card from Strixhaven: School of Mages (STX), collector number 61. Current market price: $0.15 (foil $0.01), TCGplayer market prices via Scryfall.
Flying Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.)