The rise of the ripper

It is a story about a boy who is the last surviver of his clan, a shadow clan. Shadow clan used to be the strongest clan ever but they were wiped out by fire clan to take power in hand. The history was over written and everyone was mislead by making them believe that fire clan is the strongest clan from start. The rank of the clan is there by,
1)fire clan
2)water clan
3)wind clan
4)earth clan
And finally at last as optional clan and considerd as weakest clan as,
5) shadow clan