Board Thread:Naruto Discussions/@comment-3568954-20140919015834/@comment-5407586-20140919170919

Elveonora wrote: @JOA20, chakra doesn't merge in few minutes, it takes years, excluding Sasuke's Rinnegan for the sake of plot. It took years for Ashura and Indra's chakras in Madara to merge. I guess you're right, though in Sasuke's case he awakened the Rinnegan because he gained Hagoromo's chakra, so he didn't need to wait for Indra and Asura's chakra to merge.