Wintermoor Commander is a uncommon Creature — Human Knight card from Throne of Eldraine (ELD), collector number 205. Current market price: $0.25 (foil $0.35), TCGplayer market prices via Scryfall.
Deathtouch Wintermoor Commander's toughness is equal to the number of Knights you control. Whenever this creature attacks, another target Knight you control gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)