Prisoner Deep Fourteen is a mystery prisoner who is held in Dreadhold. It is common knowledge that Prisoner Deep Fourteen was shipped to Dreadhold by order of King Kaius III of Karrnath, and only Warden Zaxon d'Kundarak knows his identity. His head and face are hidden under a steel mask that covers his entire head, and is sealed using magic that allows him to eat and drink, but prevents him from speaking. His guards are under strict instructions not to allow him near anything he could use as a writing implement.
Deep Fourteen's movements are sluggish, which has lead some of his guards to believe he has suffered some form of head injury, though it's just as likely an effect of the mask. The only thing that is certain about Prisoner Deep Fourteen is that King Kaius wants him kept alive, and he cannot be allowed to communicate with anyone, under any circumstances.