Board Thread:Versus Debates/@comment-30168027-20161030085406/@comment-9782468-20161210165958

You want proof of how much it takes to open a portal? Alright.

Naruto was fighting Kaguya, while a clone of his was safeguarding Kakashi, Obito, and Sakura. When Obito mentioned his plan, Naruto's clone said he'd supply his chakra. Obito said it wasn't enough. SO half of Naruto's entire massvie reserves, with TB chakra fragments and full abilities and everything, was not enough to open a portal.

EDIT: Also, when Naruto's clone made it through the portal and Obito and Sakura Kamui'ed out, Black Zetsu though it was entirely possible that the clones dissipated from not having enough chakra to make it to the next dimension.