This would just make the Shroud the most dangerous place. That is if the pixies really did interact with the Slyphs and are indeed hiding via glamors. As you have the elementals, Slyphs, pixies and moogles. As even though Slyphs and Moogles are normally harmless the antics both of them can get up to can become fairly dangerous. Now throw in two beings that can alter people's physical being that are also normally hidden and yikes.