Neverwinter NPC questgiver extraordinaire, will be available as a special companion. For a short time, players can bid on one of these purple-quality companions through the auction house.
The catch is that there will only be five such Sergeant Knox companions put up for auction during this event, which means that only five (or fewer) players in the game will own one, at least for the time being. As a gold sink, this will undoubtedly be quite effective to suck some of the excess money out of the economy. This special auction will take place from September 11th through the 14th.