With a thought, he summoned that one origin sword and let it float in front of his body.
Zong Shou once again looked back into his memory at all the secret books that recorded things about the emperor martial path.
That 4 move fist technique that seemed to be created by Zong Weiran wasn't complete, its strength wasn't that strong. The last time, he used it because it was related to the indefinite spiritual emperor art which meant that it could be used right away. Only then did he modify the fist technique into a sword technique.
There were many lacking points. Xue Moyan and Wuye weren't able to utilize it even if they saw the weaknesses as they hadn't achieved the peak realm which was why he killed them in such a suppressive manner.
Zong Zhen lost because he was taken by the element of surprise. If he was to fight him again, this person would be able to see through him and at least could retreat unharmed.