Board Thread:Naruto Discussions/@comment-24827576-20150504042056/@comment-25093611-20150504154422

Rayzur wrote: Sasuke got hagoromo's chakra which brings forth the Rinnegan or he got ashura chakra alone and had indra chakra all along, and that brings rinnegan too ^_^

@legion oh, i thought it meant that he used hashi cells to heal him but without the risk, therefore "the studies about the cells"-part was meant as "can use it without risks" :)