ToME WikiOrvin: How about an ability (accessible from the "m" menu) to circle around an opponent and backstab him during combat? Having a sufficiently high backstab skill would be a pre-requisite, and, perhaps, there should be others. You would only be able to attempt to "circle" if 1) the square behind the opponent (measured relative to you) were empty, and 2) a square adjacent to that and yours were empty. In other words, you wouldn't be able to circle around an opponent with his back against the wall, or an opponent flanked by others. Also, there could be a failure rate and failed attempts could leave you open to an extra attack.