I hit Play. The video clip opened with a shot of Sorrento’s avatar standing outside the front gates of Castle Anorak. The castle’s front entrance, which had been impregnable for so many years, swung open as Sorrento approached, like an automatic door at a supermarket. "The castle entrance will open for an avatar who holds a copy of the Crystal Key," I explained. "If an avatar doesn’t have a copy of the key, he can’t cross the threshold and enter the castle, even if the doors are already open."