If a wizard were to look at a tree inhabited by a creature such as a dryad, it would seem to him like he was looking at any other tree, but in truth, the tree wouldn't be of the Earth at all; it would be of the High Realm. Creatures bring the High Realm to Earth where ever they are; they bring pure, unfiltered Magic. Earth has no intrinsic magic of its own; either a person is born with it, or it comes from the High Realm.