Ooups... Rinnegan Isn't the technique kakashi used when he was fighting deidara, that is Mangekyo Sharingan(I Think)... Not Rinnegan..., and Deidara's arms will be recover after he found it again.. bcoz kakashi cut deiadara's arms into another dimension... Just 1 Person had Rinnegan, he is Nagato... Kakashi's Mangekyo Sharingan It is somehow capable of creating an interdimensional space-time warp. Kakashi uses it to warp Deidara's right arm into a different dimension. He subsequently uses it again in Chapter 278 to counter Deidara's ultimate move, which would otherwise level the entire forest they were fighting in. However, the attack requires considerable effort to aim precisely and appears to leave Kakashi's chakra significantly drained: he collapses after using the technique three times. Although this eye is labeled as Mangekyo Sharingan, it is not exactly the same as the version that Uchiha Itachi uses. The appearance of the pupil and tomoe differ from that of Itachi's. Kakashi's tomoe seem more like a pinwheel than a kaleidoscope. Before this was shown, it was thought that one had to have Uchiha blood and had to kill their best friend to acquire the Mangekyo Sharingan. Kakashi is not an Uchiha, and he stated long before developing his Mangekyo Sharingan that everyone close to him was already dead.(from saiyanisland.com) Rinnegan The Rinnegan eyes were first possessed by the founder of the ninja world and the creator of the first jutsu, the Six Realms Sage. It is characterized by a number of concentric circles around the pupil. The Rinnegan gives the user the ability to control all six types of Elemental Chakra. It's assumed that it also gives the user the ability to control rain, create copies of anyone they desire, transfer in between bodies, and gives he or she an unique array of summons. When Pain uses any number of his other bodies at a single time, he also has the power to be able to see from each of their points of view at the same time. The Rinnegan is by far the most powerful of the three great eye techniques.(from www.narutocentral.com) Hmmm... I don't know how tobi had the Uchiha Madara's power, bcoz Uchiha madara's was defeating and killed by the first hokage Head Sage, i don't know too... but in chapter 382 page 2, jiraiya say:"I've gotta tell the head sage... who pain is...before... it's too late...!"