Excalibur had captured the villain Spoor, an Acolyte of Magneto, and Campbell built a special room to perform therapy on Spoor, who had the power to control another's mood. The room had built-in lasers to react to any hostile behavior and Campbell used tranquilizers while talking to Spoor so as to inhibit his mutant power. Nevertheless, Spoor eventually provoked Campbell into attacking him. As a result, the room's weapons fired at the scientist, costing him a leg.