Skyblade's Boon is a uncommon Enchantment — Aura card from Modern Horizons 2 (MH2), collector number 31. Current market price: $0.23 (foil $0.25), TCGplayer market prices via Scryfall.
Enchant creature Enchanted creature gets +1/+1 and has flying. {2}{W}: Return Skyblade's Boon to its owner's hand. Activate only if Skyblade's Boon is on the battlefield or in your graveyard.