The Amulet of Solego

The Amulet of Solego is the main object in The Legend of the Chaos God. The eponymous Solego, is an evil immortal sorcerer of the ancient world who destroys everyone who opposes his rule. Fortunately, a young wizard named D'Shane manages to split Solego in two, imprisoning the sorcerer's immortal mind in a crystal cage and his mystical powers in its gold setting, keeping the halves separated so that Solego can never escape.