The Runestaff held all the secrets of the barren earth and the destiny of Dorian Hawkmoon, Duke of Koln, warrior, swordsman, adventurer. But how much contradictory power was contained in the Black Jewel? Dorian came to with the evil black gem embedded in his skull. It felt warm, pulsing. Then he discovered the terrible truth. The jewel itself was an eye through which his enemies, the forces of the Dark Empire, could see everything he saw - all the places he travelled, all the people he encountered. And if he refused to carry out their plan to overcome Granbretan, the Black Jewel could be made to come alive and eat Dorian Hawkmoon's brain.