Name: Knight of Obligation Cost: 3W CMC: 4 Color: W CID: W Type: Creature -- Human Knight Pow/Tgh: 2/4 Rules Text: Vigilance Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.) Set/Rarity: Gatecrash uncommon Set Code: GTC-U Legality: Legal in duel, Legal in pioneer, Legal in commander, Legal in modern, Legal in legacy, Legal in oathbreaker, Legal in vintage, Legal in penny Price: $0.18 Foil price: $0.89