Ye Guichen didn't kill Wan Ying, but instead had him assist Su Tong in taking control of Medicine King Valley, thoroughly transforming everyone there into members of the Shennong Sect.
After all, for Ye Guichen, killing was easy, but conquering a place like Medicine King Valley with nearly two thousand people couldn't be easily solved by killing alone.
Wan Ying, being the Deputy Valley Master, despite poisoning Ti'er Taoist, was the best candidate to assist Su Tong in the valley.
Moreover, from Wan Ying's mouth, Ye Guichen learned that the Life Devouring Pill came from the Eternal Life Hall.
It was an Ancient Witchcraft technique that could devour others' vitality and cultivation from a distance.
It was incredibly mysterious.
Ye Guichen, however, wasn't worried about these things.
Even though Hua Fengnu was dead, as long as he could find the right herbs, restoring Ti'er Taoist's cultivation wouldn't be difficult.
