See i would post the chapter called "In Hell," but im not on the computer.That, the 6 path abilities(deva path, preta path) and the Mazo statue.
Obito can already use rinnegan technique after he was fused with senju dna, so in reality
Ms Obito already knew deva, asura, etc.....He needed the rinnegan for proper control of gedo and
to use the six path jinchuurikis