(spoilers from onyx)After thinking about it i realized that at the end of the Tralier, a giant white radiant light is sent into space. Knowing that the material Onyx is made out of the mixture of a christaline substance and quarts, what if the light was shot to onyx. Which in turn, made the spectrum of colors, each color went to its assigned Ring and Activated it. its not neccesarily important, but its a theory on how the halo's themselves work which in turn ends the rainbow Theory. ( i think this is original but who knows.)