The Phantom Demon King was possessed by the Demon King Yejia Nan and was killed by Chu Ming and the Cyan Dragon Qilin Beast. Initially, this was justified, but no matter what, the Phantom Demon King was still a disciple of the Death Emperor. The battle back then was witnessed by many. They couldn't be sure if the Phantom Demon King was possessed, but they undoubtedly saw his body destroyed.
Life and Death Realm Kings care about their reputation, let alone a strong figure who has been crowned as a king or emperor. Even if the Death Emperor understands the situation, for the sake of his own face, he might make things difficult for Chu Ming.
Therefore, the most urgent matter in Chu Ming's heart now is to improve his own strength, and practicing Celestial Extinction Swordsmanship and refining the Soul Cleansing Water are undoubtedly part of it.
