Board Thread:Theories and Speculation/@comment-27924662-20160817160245/@comment-25122992-20160819142542

1. Well, portal creation is kinda very complex and advanced ability as it seems, and it consumes a lot of chakra as well. At the same time, flight seems to be neither complex nor chakra-draining, as it was demonstrated by Naruto in his SPSM, so it should be accessible from the very beginning.

2. I think this point is somewhat cleared after the look on the Databook.