The building is new; so new, that the spirits inhabiting it are mostly residue from the neighboring area, and the ediface has no life of its own, no history. It is a blank slate.<br/><br/>(Let's have a transmutation check, difficulty... 22. If you pass...)<br/><br/>Which means that small changes are easier to notice. Much like at the Luxor, small points of foreign energy can be felt, high in the building; they'd be indistinguishable in any building that had life to it, and even here, they're difficult to notice, at best.