The Sky Shadow Fire Cavalry and the Black Flag Army, though numbering only a few hundred, were all at the Yuandan Realm, each with terrifying movement techniques and formidable strength.
A few hundred of them were enough to kill tens of thousands of soldiers; their existence simply could not be compared with that of regular soldiers.
Although the other three empires had well-equipped troops and powerful generals, they still fell far short when compared to the Sky Shadow Fire Cavalry and the Black Flag Army.
Only after witnessing the strength of the Sky Shadow Fire Cavalry and the Black Flag Army did they realize how weak the soldiers of their own empires were.
For these reasons, the monarchs of the three great empires did not dare to take action against Feng Wuchen.
Ultimately, it was still a matter of strength.
If you are weak, others will bully you; if you are strong, they will fear you.