If there were no common enemy, the internal strife between the Celestial race and the Earth City's noble families would undoubtedly greatly deplete the resources of Celestial City.

Providing them with a common enemy, making them wary of each other without actually taking action, was beneficial for Li Mo. This was also why he decided to rise up.

He didn't particularly care about the position of Emperor.

His goal was to complete the trial as perfectly as possible.