Slackface!

Ling Xiao's reputation and might was like a marshal in the military. The three marshals were afraid that he would take away their power. Hence, the three marshals might attack Ling Xiao together if he got too strong. They wouldn't allow a fourth marshal to appear in the military.

"Even the First Marshal can't be trusted?" Li Lanfeng didn't give up. He heard that the First Marshal groomed General Ling Xiao as his heir. Shouldn't he be happy that his heir was so outstanding?

"An heir is just an heir when the emperor is still healthy and strong." How many heirs managed to become the emperor in the end? The only time it could happen was when the emperor was old and weak, thus he had no choice but to hand over his power to his heir.