Wen Yu's plan of pulling the rug from under was indeed vicious, but Wen Yu provided a way out—breaking free from the Demigod's control and joining Yanjing, everything would still be as before.
In the plan set by Wen Yu and Lin Haifeng, this move could indeed cause a huge loss to the Demigod's forces. At the very least, a small portion of mutant beasts and most professionists affiliated with the Demigod would surely shift allegiance, and from then on, the Demigod would no longer have the capital to compete with Yanjing.
