Board Thread:Theories and Speculation/@comment-25576506-20150406220206/@comment-1783334-20150408072401

What Windstar said. Power is a vague word. We don't know what really happened between the brothers apart from Indra (being manipulated by Black Zetsu) declared war against Asura and the two brothers went to their graves but not before leaving behind descendants to continue the fight. In either case, Asura eventually gained the power to rival Indra, which most likely meant he became capable of facing Indra face to face, one on one. Furthermore, there was nothing Hagoromo said about leaving anything for Asura other than the title of Ninshu's leader.