Syr Gwyn, Hero of Ashvale is a mythic Legendary Creature — Human Knight card from Throne of Eldraine (ELD), collector number 330. Current market price: $2.87 (foil $3.03), TCGplayer market prices via Scryfall.
Vigilance, menace Whenever an equipped creature you control attacks, you draw a card and you lose 1 life. Equipment you control have equip Knight {0}.