Board Thread:Naruto Discussions/@comment-30323490-20180418150329/@comment-734582-20180419052600

Vladosaurus wrote: EMS works differently. It doesn't increase you chakra pool by any means. I don't see why this matters in the slightest. EMS Sasuke summoned a giant snake with absolute ease. He summoned a much smaller hawk from further away. Given that with Rinnegan he has special summon abilities, more powerful chakra, and more chakra, what can be considered "easy" also increases for Sasuke. Combining these two, summoning the hawk could be a huge feat for a normal shinobi yet easy for sasuke.

Kaguya required massive amounts of chakra to move between dimensions, Obito needed massive amounts of chakra to move between dimensions, and Hagoromo needed 20 or so Kage to summon them back from the dimension. The only one who did something easy space-time wise was Sasuke, and that was for something he was demonstrated to do easy and cost nearly nothing.

Then there's the matter of whether FTG could even work to do this, and i have my doubts too. If Minato could easily escape Kamui that way, why did Obito believe he could capture him that way? He knew his sensei, he would know that it would be pointless.