The Black Hand was an elite group of magicians and spies who were personally trained by Galbatorix. The group was named after the title of Morzan's spy Selena, who was the mother of Murtagh and Eragon. They made many attempts to assasinate Nasuada.
There was not much known about the Black Hand or its members. The Varden was unaware of its existence until a member of the Black Hand, Drail, attempted to assassinate Nasuada. Trianna hunted down and entered his mind after the failed attack and discovered their existence.
Drail was the only known member of the Black Hand. He committed suicide with magic before they were able to extract any useful information from him.
Duties and FunctionsEdit
The Black Hand functioned as an arm of the Imperial Army specializing in magical combat. Their responsibilities were whatever Galbatorix said they were. They infiltrated the Varden, attempted assassinations, as well as did whatever they were instructed to do in order to disrupt the Varden's cause.
The Black Hand was a secret nationalist organization in Serbia before the first World War. Members of the Black Hand assassinated the Austrio-Hungarian Archduke Franz Ferdinand and his wife in Sarajevo on June 28, 1914, what is considered to have been the main catalyst to the start of World War I.
In the video games the Elder Scrolls, one of the guilds in the games that specializes in assassinations has a council known as the Black Hand that oversees the duties of the subordinate assassins. It is possible that the Black Hand from the Inheritance Cycle has been based on this or vice versa.