Even though he was a great diplomat, even though there were conspiracies in his kingdom, but he was a master of fighting, able to prove even immortality.
When he trained his successor, and that would be when he came to the end of his life in a fusion ceremony between the two beings.
It was over time, forming a single and stronger and younger, it would be a biological and young succession, thus creating an indestructible being.
To which if we do not take away the fact that Jandur created Jogun as a male warrior a true prince, even though he was really that, and not a princess.
Knowing that...