Nan Gu had a wonderful idea to get the stone cover open, but he couldn't. He had to secretly use his internal strength to crack the stone cover and lift it open. Sure enough, there was a book wrapped in yellow silk cloth hidden inside. When he untied the yellow silk cloth and took a look, in the corner of the writing, there were four seal characters "Huanjian Zhenjing" and "Huanjian Zhenjing" written in four characters. It was like an electric lightning strike, making Nangu Miao's whole body tremble. For a moment, he stood dumbfounded. Is this more than just a strange book in the human world? It is regarded as the most precious book of martial arts secrets by people in the martial arts world. Where did this departed senior get such a wonderful martial arts book? The treasure of martial arts? For this wonderful book, countless famous figures and demons in the underworld have been sacrificed in the martial arts world for a hundred years.
