Note that while we have an accepted word for such a feature in the file space, we do not have one for the building structure. B is still as far from A as it was before, because both alias and magic door typically are one-way connections. The two features above create a short connection between two distant locations in term of the spatial metaphor. Should something like that occur in the everyday world we probably would speak of magic. These features are therefore called magic feature.
Most magic features appear as magic only when the spatial concept of the interface is made explicit.
An example is the find command in a file system. In hypertext we often are in a similar situation as in the find command. Linking essentially moves the user in an abstract space without giving much indication on the whereabouts. When calculating clusters in hypertexts a neighborhood relation is defined that makes the structure of the hypertext explicit. Links that do not fit into that clustering scheme then become shortcuts and magic features.