Board Thread:Versus Debates/@comment-26388300-20150708194704/@comment-5273810-20150721172725

BakumatsuWarrior wrote: 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. A few things I want to say, Obito said 2 Rinnegan was to much for him to handle not 1.

Secondly, The secret was not Izanagi for Itachi. The secret was how Kamui works. Obito did not use Izanagi to get out of Itachi's trap he used Kamui. If Itachi had knowledge on how Kamui worked Obito might not have survived as he himself noted. Itachi also knew that Izanagi existed and if he knew Izanagi existed he would know "Madara" could use it as "Madara" was the most powerful Uchiha ever and knew practically everything there was to know about Sharingan and MS based jutsus.

Thirdly, where was it stated that if he used Izanagi he can't use Kamui? If he uses Izanagi it would be with the Rinnegan which I don't know is possible. When I mentioned it in the first place I kinda forgot we were talking Obito with Rinnegan :).

Lastly, Nagato is a sensor if he has prepared to sense things. He used the Rain Jutsu to sense people entering and exiting the village. It also has been noted that having the Rain Jutsu up consumes a lot of power hence him removing it against powerful opponents like Jiraiya. Without the Rain Jutsu up Obito can sneak up and surprise attack Nagato.