Ravenguard

The mysterious Ravenguard are elite thieves supposedly led by the enigmatic Mr. X.

Description
While no reliable accounts of the Ravenguard have surfaced, specific physical details can be found in every story, such as the eponymous raven masks that give them their name. The individuals of the Ravenguard wear black full body suits with gloves and cloaks, making personal identification all but impossible.

Activities
The Ravenguard have been blamed for a spate of spectacular heists within the past year, exclusively targeting immensely powerful and expensive Relics created by magisters of the Old Empire.

These ancient Relics are placed under the most formidable of security systems in the world, but are still regularly stolen by the Ravenguard without leaving a trace.

Sightings of the Ravenguard have been reported virtually everywhere in the Core Empires and from far away as Daresh Arat in the Northern Wastes.

Rumors
Gossip concerning the Ravenguard is as wild and varied as the gossip surrounding Mr. X.
 * Some say the Ravenguard are elite members of the Black Hand, which is also run by Mr. X.
 * Veteran trapmakers and experienced rogues are supposedly scrambling to make a "ravenguard-proof" vault or defense mechanism. They have, apparently, failed.
 * Wizards investigating the thefts are commonly frustrated. The Ravenguard are said to leave no trace; no magical auras, fingerprints, footprints, hairs, dandruff, or sweat have been found at any crime scene.
 * On rare occasions, guards have claimed to have encountered the Ravenguard face-to-face, however, these encounters have only lasted however long it takes for said guards to be rendered unconcious.
 * Astute observers and journalists claim that no one has been killed during a robbery.
 * Those that have seen them say the Ravenguard are giant birds, capable of flight, can turn invisible, and are faster than the eye can see.
 * Lord Tethar of the Barony is rumored to be furious with Mr. X and the Ravenguard, and is offering a massive bounty in the millions of gold in exchange for their apprehension.