Dark Sun: Prism Pentad Book IV. The Dark Lens…an ancient oracle that can harvest the magic of the sun, hidden by the last dwarven knights for the sake of a new world. With it, Tithian of Tyr can evolve into a true sorcerer-king. Only Agis of Asticles, who covets the lens to destroy the Dragon, stands between Tithian and his desire. For either man to survive the quest, tha hatred between them must be vanquished, If not, they will surely fall prey to the beast-headed giants who guard the Obsidian Oracle. Cover art by Brom.