Ossian's newest Neverwinter Nights 2: Mysteries of Westgate spotlight feature focuses on the Ebon Claws Guild.
The origins and hierarchy of the Ebon Claws are obscure; they are still too new for much solid information to yet be widely known, but it is obvious that even the Night Masks are unsure. Their agents, normally discreet in their pursuit of information, have become ever more insistent in their interrogations, and large amounts of reward money are offered to any with solid information. The rumors circulating the local beer halls are mostly fantastic, for it is argued that only a fantastic origin could have taken the Masks masters of stealth, spying, and intrigue so completely by surprise.
There is, however, one persistent rumor circulating regarding the Ebon Claws. There have been enough sightings of their deformed agents to suggest that it is a guild heavily if not completely plagued by the disease of lycanthropy, though the specific variety of the infection is not that of the more legendary werewolf, but is instead that of the more common in cities, at least wererat. If true, it would explain their success against the Night Masks. Extremely agile and aided by preternatural strength, a squadron of wererats would make tenacious foes dangerous even for the hardened rogues and thugs employed by the Masks. However, such stories, as yet, are still just rumors, though one concrete fact lends credence to them. Recently, the Night Masks have begun spending an enormous amount of coin with the local merchants on the acquisition of silvered swords, daggers, and rapiers, weapons known to have an uncanny ability to harm lycanthropes of all kinds. It is therefore obvious that the Night Masks, at least, believe the stories to be true.