Ning Que asks Hong Yu to teach Sang Sang, given she is the successor of the Grand Priest of Light. The sage in the cave decides to give Long Qing half of his cultivation, but Long Qing becomes greedy for power and takes it all. He also steals the Heavenly Channeling pill plus other items from the Monastery of Knowledge and Obeisance. The Grand Prince and the Emperor battle it out as the massacre 16 years ago comes to light. (Source: frankly at MyDramaList)