Board Thread:Naruto Discussions/@comment-28861328-20140618060932/@comment-26302001-20140618164624

It said he used Izanagi, to switch his body with a Kage Bunshin, and at the same time made it to where it was the Kage Bunshin who used Izanagi and not his actual self... plus he has EMS so maybe it truly is eternal, if used like Madara used it.