In an effort to help keep the ancient ruins of the Combine City secret, I have agreed to travel into Karnor's Castle and remove Venril Sathir's vampire Lieutenant Xalgoz from power. The leader of the forgotten, Teren Rysis is concerned that Xalgoz is creating an army of vampires for use in the war and feels that this large use of vampirism can easily spread to those loyal to him. Teren believes that the only way to slow his progress is to remove him from power. This task is going to require the help of other powerful adventurers like myself and will not be an easy one, for Xalgoz can only be found deep within the keep of Karnor's Castle.