In the 26th episode of Tribes and Empires: Storm of Prophecy, Huang Xuan‘s role Muyun Sheng became crown prince and knew his dark side’s intention and sealed him.
Muyun Qin woke up and killed all of Nanku Family except Nanku Mingyi and Nanku Yueli, then he appointed Huang Xuan as crown prince. Huang Xuan asks his dark side that what he will do if he becomes the emperor. The dark side replies him that he will kill the weak and keep the strong.
Huang Xuan took out a knife and stabbed his chest and sealed his dark side.