Set in the time before time...
Bearer of the great Kanohi Kraahkan, father of the Rahkshi, freer of the Bohrok, brother of Mata Nui, and the master of shadows. A being of true darkness, to which only the Toa will he bend (unwillingly), but never break. When transported to another dimension as a final act of the Toa defending Mata Nui and the mask of life, Makuta and his creations have a world of purity and light ahead and angry Toa on their backs. Will the ponies be able to resist the darkness, or will their purity and their sun be lost forever?
(Bionicle universe crossover. If you don't understand Bionicle story lines, this shouldn't make much sense to you. You have been warned)