Put down the cultivation technique, Lin Feng flipped through the two manuals of martial arts again.,"This is the martial art Old Empty cultivated," Lin Feng's gaze flickered. It seemed that Old Empty had refined the first move, "Slaying Shadow," and combined it with his unique shadow Wuhen, making it truly powerful.,"There must be some secret behind this door. Perhaps the ancient hall's owner left clues within,可惜 I simply cannot open it."。