Guistenal

Guistenal is a ruined city in the Tablelands of Athas. It was founded by Dregoth after the Cleansing Wars and existed as any other city-state for several hundred years.

Unknown to most (even to most of the population of Guistenal), Dregoth was using some of the inhabitants of the city in biomagical experiments, intended to replicate the success of the rhulisti life-shapers. His aim was to create a "perfect" race, modelled on his own, increasingly draconic, form; a race he called the dray. After the early generations of dray were created, Dregoth discovered a ritual that would allow him to complete the draconic transformation in a single step, leading to an attack by the armies of Urik, Tyr and Ur Draxa which destroyed the city.

Unknown to any, Dregoth survived the attack as an undead, and dug out the underground city of New Guistenal under the ruins of Guistenal.