Board Thread:Theories and Speculation/@comment-30355627-20170210181343/@comment-24824859-20170211160129

@QuakingStar Obito himself said that to create a portal requires immense chakra, and he needed assistance not because he was low but because he simply didn't have enough. So yes, sayung that he was close to death is a lame excuse. The wiki states that the planet resides in another dimension. Even if it didn't, Kaguya's dimensions could also be the same thing: faraway worlds in the same universe. Whether it was created or not is completely irrelevant. Both cases involve vast distances. Sasuke going in and out of Kaguya's dimensions left him low on chakra but not to the point where he is left bleeding and panting. No one is overestimating his reserves