Board Thread:Versus Debates/@comment-26636534-20170822151908/@comment-5085906-20170826113656

Ravenlot 27 wrote: Anyway, I'm not gonna listen to your riduculous in this thread anymore. Wanna continue the discussion with some sober-minded people right here.

So, guys, you were saying Obito doesn't need the Rinnegan to defeat Itachi? Well, maybe, that's true, since Obito didn't even rely on the Rinnegan that much when he wielded it, as seen in the fight against Naruto/Bee/Kakashi/Guy. He has a better shot with Rinnegan if he wants to stay away from Itachi's Izanami, which is able to simulate phantom senses that the victim relives continuously. His Gedo Mazo enables for some quick-fire, chakra-absorbing attacks that work like a charm against someone with below-average chakra reserves like Itachi.

But other than that, yeah, there's no other jutsu that Itachi can use to harm Obito.