This was written for another character of mine. Who actualy has an interesting past.
In life, he was a powerful Dragon... and one of the last of his kind. However when a darkness tried to overtake the land, he was caught by it, but in return... the darkness was destroyed.
But death was not merciful to him. He was denyed peace, and instead was forced to roam the world.
Hence why the tittle is named phantom.

Just the baisic details behind it... of course there is more, but I am too lazy to explain. ^^