C921 Reasons
The Ten Severing Formation was a formation that the nine heavenly kings were proud of. Even if Liu Sun mentioned something about their strengths, he wouldn't reject it.
The Duke of Qin said, "This technique is marvelous. Five days later, we, the Ten Lords, will set up a Ten Severing Formation under the Three Mountains Pass. We await your orders to break this formation."
When Li Zhi returned