The emperor was captured when his soul passed through the earthen fortress, and the whole world laughed at him for his shame and humiliation.
But when the soul of the modern soldier king was injected, the [Overlord] attribute was awakened, and there was a peerless killing god on the grassland!
What they captured was not a useless emperor, but the future ruler of the entire world!
See how he killed his subordinates, regained the throne, and used the bones of his enemies to build an empire that spans Asia and Europe on which the sun never sets!