Board Thread:Naruto Discussions/@comment-28861328-20140618060932/@comment-3568954-20140618100110

it wasn't her will controlling it. the 10 tails was literally the manifestation of her will she wanted to take back chakra from her sons(her chakra chakra is the molding of physical and mental energies so the shinju did not actually have chakra. the shinju was made of natural energy) hagoromo and hurama thought the shinju mutated into the 10 tails but it really was just kaguya. they sealed her away before that happened kaguya's will birthed Black zetsu who manipulated indra and ashura's decedents(specifically the successors(madara and hashirama and would have tried to manipulate sasuke and naruto) into awakening the Rinnegan(but failed until madara) for the purpose of reviving her