Actually he is looking for long lived creatures to have a recount of what has happened to the world since he last walked the earth given that magic techniques have diminished to mutch. When he reachs a certain age he goes to live with the Mercenary band that his father used to belong, then after some years he comes back home and tell his parents that he will be traveling the world. Where Kaious guets into Magic school, Rips the Head Master (wich is supposedly one of the stronguest mages on the current period) of the academy arm off, reconnect with two of his King class spirits, threaten every noble that makes the mistakes of crossing him, denies any political promotion. So they moved away from the village they lived to the Capital. His father had a period of indecision and suspicion of paternity but the love and trust of his wife helped him pass that. His last mother didn't believe in such a thing so he was able to be delivered in the present time.

He has been revived several times but dies as an infant (actually guets killed) because the powers that fear his migth have spread an profecy that the child born with Silver Hair (due to the great amount of mana at his dissposal his hair changes color) is demon possesed and should be killed as soon as posible. Till I remember the MC (Kaidus) was an extremely powerfull magician in his past live to the point of facing an army and mutualy anhilating each other.

I almost forgot about you synopsis