As you can see here:http://mangastream.com/read/naruto/86022516/19
The Juubi seems to be phasing through the land itself, in addition to that, during the gigantic BIJUUdamas explosion, its chakra evidently disappeared. Who else do we know that can do that?
Did the Juubi execute powers of Mokuton and slip through solid ground like Zetsu?
Or was it something else?