Board Thread:Episode Discussions/@comment-1251315-20160721110532/@comment-1512913-20160721194243

The chakra multiheaded avatar can still be seen for a brief moment in this episode, but it was left unexplained. Hagoromo indeed gave Asura actual power as this episode 'proved' (non-canon nonetheless) Six Paths Senjutsu, which resulted in Asura's improved skill of chakra manipulation and Truth Seeking Balls... then Wood Release came out of nowhere and even later the Kurama-like avatar, so shrugs.