The massive Ancient Tomb Sect was located within a large mountain and was not as one would expect, filled with Yin Qi without a trace of sunlight. It was only after Ye Tianchen carried Dongfang Meng inside that he discovered the sect was lit everywhere by Luminous Pearls, ensuring brightness at night. During the day, sunlight could enter as well because the top of the Ancient Tomb Sect was ingeniously designed not to block sunlight yet still prevent rain from entering. The sect's founder, Grandmaster, was indeed a master of ingenuity, a truly remarkable woman.
Ye Tianchen took out a sheepskin map that Zhang Yide had given him and marked five red spots on it, indicating the locations of five secret chambers of the Ancient Tomb Sect. Not to mention outsiders, even the internal disciples of the sect would find it impossible to enter these chambers. Perhaps even Dongfang Meng had always adhered to the sect rules and had never entered them.