Scion of Oona is a rare Creature — Faerie Soldier card from Modern Masters (MMA), collector number 63. Current market price: $12.50 (foil $22.50), TCGplayer market prices via Scryfall.
Flash Flying Other Faerie creatures you control get +1/+1. Other Faeries you control have shroud. (They can't be the targets of spells or abilities.)