Board Thread:Naruto Discussions/@comment-25139119-20140705022956/@comment-24808887-20140718145428

Elveonora wrote: JOA20 wrote: What are Gudodama then? Natural energy+tailed beast chakra+whatever nature the user has? Pretty much. You making things as you want.

When asked about Minato`s hand Obito Replied that he has now power of shinobi ancestor(Rikudo) - what he meat was his Rikudo Sejutsu(becose when he was using black chakre before(in initial jubi jinchuuriki state) he did not had power of Rikudo Sejutsu what can be conformed just by looking on his back). So everyone who has Rikudo Sejutsu can use Gudoudama(and it will negate ninjutsu)