Eberron - Return of the Lich Queen
Temple of Kha'shazul
Named after a dragon of legend, this temple is known to rest atop an ancient fiendish power source said to be an orb or “eye” of great power, supposedly named Arida-astrix-sauriv, or the Dragon’s Eye. It is said to be a device or artifact from the Age of Demon’s crafted as a means to dominate all dragonkind. This artifact was believed destroyed; but has resurfaced in the draconic prophecy. The awakening of the Dragon’s Eye will herald great doom.