Board Thread:Naruto Discussions/@comment-34700383-20180829185752/@comment-6769189-20180902133926

Hag0r0m0 0htsutsuki wrote: LegionZero wrote: "Six Paths Chibaku Tensei is invoked when two users simultaneously touch their target with the "Yin" and "Yang" seals. It rips a giant chunk of earth up and turns it into a heavenly body, becoming the Prison of Six Paths (六道の獄 Rokudō no Goku) that can capture all things (万物捕, "banbutsuto"). It's a sealing jutsu that can be used by individuals who awaken Six Paths Senjutsu. "[]

You are wrong. Accept it.

That doesn’t explain how they acquired that power, does it? It also doesn’t explain why madara and obito got rikudo senjutsu only after becoming hosts of the juubi. It doesnt have to explain it how they got it beforehand. 6 Paths Senjutsu can be achieved without the Juubi. The Juubi can be used as a shortcut since Madara and Obito domt know how to do it on their own. They dont even know basic Sage Mode, and SP Senjutsu is a higher form of Senjutsu.