Board Thread:Naruto Discussions/@comment-3571355-20150819100444/@comment-734582-20150824172353

GreatestSin wrote: im not sure but have they been mentioned to be "unique to the user"? They're unique because they are only used by one person each. For all intents and purposes, these powers are unique to the user. Whether they're powers that can be learned is completely unknown. Given that Sasuke and Madara activated these powers upon gaining their eye without trouble suggests it's a truly unique power. However, MS powers were seen as unique until Sasuke got Amaterasu too. Statistically, there's no basis to assume that only Madara can use Limbo. It's possible that if you put 100 rinnegan users in a room, Limbo/Placeswitch is a 50/50 divide. Or that there are 100 unique jutsu. Or just about any other possibility.

Hence, it's not possible to absolutely prove that these powers are truly unique, nor is it possible to prove the opposite. However, i doubt it's a jutsu that can be learned.

Regarding Nagato, if we consider Kakashi's case there's in theory nothing stopping him from using that jutsu. However as Obito explained, using a Dojutsu that isn't yours costs a lot more willpower and chakra than normal. Limbo may simply be out of reach for Nagato.