Board Thread:Versus Debates/@comment-26388300-20150708194704/@comment-26773508-20150721164844

As per the conditions laid out by OP, Obito wins easily. But Prime Nagato with full Rinnegan abilities, no crippled legs and with all the intel he had at the time of his death, would beat Rinnegan Obito. Obito himself said that handling one Rinnegan made him feel as though he would "get lost" because of the chakra drain. Meanwhile Nagato destroyed the entirety of Konoha after fighting high-level jonins like Kakashi, and still managed to corner Sage Naruto with Chibaku Tensei. And then he had enough chakra to use Rinne Tensei on all Konoha denizens, while being emaciated and past his prime. Also, Nagato knows about Kamui, but almost certainly has no knowledge of Izanagi (since neither Konan nor Itachi knew he could use Izanagi. I'm basing this assumption on Obito's inner monologue after being nearly fried by Amaterasu implanted on Sasuke by Itachi. Obito said to himself along the lines of "Even I managed to keep some secrets from him. That secret I assume to be Izanagi) And if Rinnegan Obito uses Izanagi, then he can't use Kamui. He is also unlikely to sneak attack on Nagato after using Izanagi, since Nagato seems to be a sensor, so he would sense Obito's presence.