The Daoist in black was naturally the Sect Leader of Xuanzhen Sect, Li Xuan Ye.
The duel between Li Buyi and Wang Haichan was a major event that would decide the future direction of the sect for hundreds of years, so Li Xuan Ye needed to give it his utmost attention.
Li Xuan Ye had been cultivating for hundreds of years and had only barely managed to refine the Godslaying Bell. The Xuanzhen Mountain itself.
This divine artifact was too powerful, and Li Xuan Ye could barely control it. Moreover, he could only wield it while staying within Xuanzhen Mountain.
However, while presiding inside Xuanzhen Mountain, he was able to establish a profound resonance with Li Buyi through the divine techniques of the Godslaying Bell.
Li Xuan Ye could see what he saw and hear what he heard.
The process of Li Buyi being killed by Gao Xuan was something he saw very clearly.
