The power Roy used to kill the first wave of Voss's sons was similar to Victor's, the empire's first prince. The latter could control the world's energy using his authority. Roy could do the same because of his Lord-Rank Physique. It could be said that Prince Victor now had no advantage over Roy. It's just that everyone knew that Prince Victor was a soul herder of the first rank but didn't know what his ability was or its specialty. It might be like Roy's, giving him a special body or something else. It could be anything, and that's the only thing Roy needed to be wary about when going against him.
Some soul herding abilities couldn't be explained as they defied logic, able to kill a person from a thousand miles away. They were just that terrifying.
"Take me out of here."
The Female Siren jumped into her husband's embrace, pitifully looking into his eyes and wrapping her limbs around him like a koala. When she looked into his eyes, he lost the desire to push her away.