Sword Art Online Progressive, Vol. 7 (manga)

"The mysterious player Morte has manipulated the human guilds into fighting on both sides of the Elf War! While Kirito challenges him to a duel, Asuna has an important task of her own: Steal the battle plans from the forest elves so she can end this quest before it turns deadly. They need to stop the war before anyone loses their life--permanently!"--Page 4 of cover.