"You mean this is the work of the empire?" asked Belenio incredulously. He was a self-centered and overbearing man, so he never thought that the Cannaris empire might learn of his plans and strike back.
It was this same egocentrism that led him to ignore Dulma's warning and plan against the Cannaris empire, believing that the strength of his kingdom was superior to that of the empire. At the time Dulma had warned him that it was not wise to attack them, but his arrogance blinded him and this was the result.
Dulma despite being younger in age than Arturios and Demon looked older, which showed that he was weaker than them, it is common knowledge that, in this world apart from certain special methods, strength helps to maintain vitality which is why powerful experts generally look young.