Once upon a time there were beings that watched over the world protecting it from the darkness. They weren't gods but they were nearly as powerful as those that called themselves gods. Few knew of these bekngs. There was no reason for them to be known. Eventually the beings that called themselves the Zodiacs faded away. But before they did so they broke up their symbols and hide the pieces through the world to keep them out of the hands of those who would use them for evil. Then each of them gave a piece to their Ruler so that their powers could be used by others in the future if the need arose. The world is changing and the need for the Zodiacs has returned. So the Ruler released the pieces to find people that fit the the powers that came with the symbol.