Dark Sun: The Scorched World of Athas
An intricate contraption of spinning platinum cables and black iron rods set with hundreds of blazing gems all mounted on a stone and rusted iron disc. When first discovered the engine was held aloft on a crackling pillar of energy.
This device was found in the Shadow Tomb in Gray by Elleandra and her companions. It has been speculated that the device was draining the energy of the plane and channeling it to another location.