The Yunhai Sect, in the past status within the Coastal State, was indeed very powerful, dominating an entire state.
Yet after all, it was just one of the subsidiary forces of the Carefree Sect, nothing special.
The Human Clan occupied a vast territory, arguably the largest clan in the Soul Martial Continent, with just the Southern Domain of the Human Clan territory alone divided into three thousand six hundred states. Both Coastal State and Yunhai State were merely one of them.
Within the Carefree Sect, there were a total of forty-six sects of similar level to Yunhai Sect that relied on it for survival.
Li Yunfeng was the only son of the Sect Master of the Carefree Sect, and he indeed had the right to dispose of the life of the Deputy Sect Master of Yunhai Sect.
Moreover, Yunhai Sect had been in a great deal of internal strife recently, with intense factional fights, especially that Wu Chunshan, whose methods were sinister, causing the death of many he held a grudge against.