Board Thread:Versus Debates/@comment-43403813-20191212024545/@comment-9782468-20191214185205

@Jason, Kamui is dimension is not Kaguya's dimension. There have been no precedents to exiting Kamui via anything but Kamui. In fact, if reverse-summoning was possible, then Kakashi would have used that to exit the dimension insted of Kamui, since Kamui taxes the hell out of him compared to summons.

In fact, Sasuke summoning a hawk might've either been because Sasuke has a lot of chakra and was amped by Hagoromo, or Kishi just forgot that it'd be ridiculously strenuous. Because Hagoromo needed all of the past Kage to bring them out of Kaguya's dimension.