"North Old Man, you..." Lin Feng's expression changed dramatically as he chased after him with the intention of stopping the North Old Man, only to hear his words cut off by the latter.,"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.,Lin Feng went through the other martial arts on the bookshelf, but could not find one that was more suitable for him than the Cross Shadow Killing Technique. Eventually, he gathered all the martial arts on the bookshelf and placed them inside the stone ring.。