Fighting many Martial Artists simultaneously was difficult, but as Rui was more exposed to them, he was able to adaptively evolve to them just fine. He grew increasingly proficient at dealing with all of them at once.
The Sekigahara Confederate had deployed a high-grade Martial Master as well as many mid-grade and low-grade Martial Masters to kill him, yet they could have never expected that they would have all failed to take him down.
The power he demonstrated far exceeded even their most generous evaluation of his combat level. After all, how could anybody have imagined that just a few years would have been enough to approach the peak of the Master Realm?
"He's strong, by Gaia." A man heaved a sigh, shaking his head. "To think that we will fail to kill despite all that we have reserved him. To think he can have such power in the Master Realm. It looks like I might have to…"
His eyes narrowed. "Kill him myself in the name of Gaia."