Winter, Cursed Rider is a rare Legendary Creature — Human Warlock card from Aetherdrift Promos (PDFT), collector number 228p. Current market price: $0.13 (foil $0.45), TCGplayer market prices via Scryfall.
Ward—Pay 2 life. Artifacts you control have "Ward—Pay 2 life." Exhaust — {2}{U}{B}, {T}, Exile X artifact cards from your graveyard: Each other nonartifact creature gets -X/-X until end of turn. (Activate each exhaust ability only once.)