Board Thread:Theories and Speculation/@comment-5413572-20151114042410/@comment-3965545-20151210131517

I can only assume that when Obito gave him the TB chakra he was missing, that he was given some of Madara's personaly chakra along with it.. because Hagoromo explained in Naruto and Madara's cases it took either Kurama + Asura + Indra chakra to summon him.. or Ten Tails + Asura + Indra chakra to summon him. So most likely the moment Obito put some of Madara's TTJ chakra along with the TB chakra in Naruto that he met the requirements to meet Hag. Sasuke apparently only needed the Hashirama cells.. so I guess its different for Indra transmigrants.. and Hag only appears to those he believe deserve it or are worthy anyways it seems.