From the introduction:
For countless years, the Tomb of Xulthas-Ka has eluded even the most intrepid of explorers. The only things known about the sorcerer king whose remains are interred within the tomb are that he owed allegiance to unholy powers and that he possesed an unparalleled collection of arcane secrets. The name Xulthas-Ka is a legend among scholars and graverobbers alike, who whisper tales of items of unfathomable power that rest in a black sarcophagus in the lightless depths of his profane vault. The tomb itself hides amidst the deadly southern jungles and is recognized by the massive ebony slab that marks its entrance. This solitary doorway is cut into the side of a sheer cliff face and has remained sealed since the tomb was constructed.