Board Thread:Naruto Discussions/@comment-434627-20160705183726/@comment-27089028-20180305220202

Technically the Rinnegan was his as he was pretending to be Madara and didn't break character, that's not a lie but a half-truth. It's stated both in the battle with Danzo and Sasuke as well as Konan and Obito that Izanagi requires both Senju and Uchiha powers. It makes no narrative sense for Obito to introduce this ability and then lie about it in either scenario. The real reason why Izanagi becomes more accessible later on is due to the introduction of Izanami (which is undeniably just a 'how to conveniently defeat Kabuto' jutsu) which does not require Senju DNA hence why Izanagi is retconned into not needing it by proxy.