Name: Battle Mastery Cost: 2W CMC: 3 Color: W CID: W Type: Enchantment -- Aura Rules Text: Enchant creature Enchanted creature has double strike. (It deals both first-strike and regular combat damage.) Set/Rarity: Lorwyn uncommon, Duel Decks: Heroes vs. Monsters uncommon, Magic 2015 uncommon, Dragons of Tarkir uncommon, Battlebond uncommon, The List uncommon Legality: Legal in penny, Legal in duel, Legal in legacy, Legal in predh, Legal in modern, Legal in pioneer, Legal in vintage, Legal in oathbreaker, Legal in commander Price: $0.21 Foil price: $0.91