Board Thread:Episode Discussions/@comment-25549954-20160609122618/@comment-3279282-20160609170130

How can Hagoromo talk about Black Zetsu when he never knew of its existence? As far as I know, he never learned about Black Zetsu, did he? So how can he appear in the flashback? And how can Hagoromo talk about things he didn't experience himself, but Indra/Ashura and even Black Zetsu?