Skyrider Patrol is a uncommon Creature — Elf Scout card from Core Set 2019 (M19), collector number 224. Current market price: $0.13 (foil $0.41), TCGplayer market prices via Scryfall.
Flying At the beginning of combat on your turn, you may pay {G}{U}. When you do, put a +1/+1 counter on another target creature you control, and that creature gains flying until end of turn.