I have learned, not only do the Fae use shadows, but they also use masks to present themselves. They will weave their fairy glamore around themselves to create a mask or illusion I can't see pass. They may appear as a deer or a bird so they can go unnoticed. A familiar object that one doesn't think out of place. Their masks hide them like a veil and obscures them from me - giving a different perspective of what I think I am looking at. It is only at the time of removal (like the stroke of midnight in the fairy tales) when what is underneath is revealed.