Mu Qinglan possesses the Cultivation State of Saint Fifth Realm, while the Supreme Elder of Canghai Sect is only at the Saint Realm Second Layer. It is very likely that the Supreme Elder of Canghai Sect is no match for Mu Qinglan.
But if that Supreme Elder of Canghai Sect is dealt with, then people from Canghai Sect will disclose matters related to the Chaotic Star Sea and reveal the existence of the Tianchen World, surely attracting more forces and powerful entities to the Chaotic Star Sea.
In case the existence of the Tianchen World is learned by the Imperial Mountain Quasi-Emperor and he leaves seclusion early to come to the Chaotic Star Sea, then they might only have the option to flee.
At this moment, Lu Chen's face was extremely serious. After much consideration, Lu Chen could not think of a good solution, and he didn't want to continue feeling anxious.