Aryel, Knight of Windgrace is a rare Legendary Creature — Human Knight card from March of the Machine Commander (MOC), collector number 318. Current market price: $0.40, TCGplayer market prices via Scryfall.
Vigilance {2}{W}, {T}: Create a 2/2 white Knight creature token with vigilance. {B}, {T}, Tap X untapped Knights you control: Destroy target creature with power X or less.