Board Thread:General Discussion/@comment-26099499-20150226151824/@comment-26198742-20150921234734

So your basically saying Qrow has a semblance that gives him a form of omnipresence(Which basically allows him to be "everywhere and no where") However instead of being everywhere at the same time he can only see everything at the same time, if i learned anything from watching Hellsing Ultimate is to never underestimate a person with that ability.....

Highly unlikely theory of mine but worth a thought, it's possibly a Type of Dust that allows Raven to open portals and if you look at the sheaths dust vials it has a lot of dust types and the idea of non elemental dust is possible considering that as dust can be mixed too create new types of dust.