Roving Cities of Tharwaza

The Roving Cities of Tharwaza began to appear throughout the Tharwazan Desert during The Age of Wonders after the reappearance of Aljini-Eajib - The Wondrous City of the Djinn. Adventurers, explorers, thrill-seekers, and fortune hunters alike flocked to the desert in hopes of finding the magical flying city and getting their wishes granted. At first the cities were nothing more than nomadic tribes of people, scouring the desert for any sign of elemental interference on the surrounding sands. However, as the centuries passed and magical and technological skill increased (largely thanks to immigrants from Thast Mondavrik and Janujibal) the cities are now a variety of shapes and sizes and travel around the desert mechanically as massive vehicles in their own right.
Some cities form alliances between each other so that each city can focus on hunting for one element in the desert. For example, one Roving City might have the tools, equipment, or magical capability to search the desert for rapidly appearing oases indicating that the city is being influenced by the Plane of Water and is nearby, while another city might be able to scan the desert in the same way but for the appearance of a trail of shrubs or cacti, indicating the influence of the Plane of Wood instead. A small few of the Roving Cities however are massive enough that they can search for each of these elements all on their own, and may even have small teams sent out on smaller vehicles to expand the search throughout the desert.
Whenever a city manages to find Aljini-Eajib the wish djinni of the city permit the Roving City to make one wish to be granted before the city moves again. Because of this, each city has their own cultures, rituals, and traditions on how the city's wish should be decided.
Despite the Roving Cities of Tharwaza first being founded by treasure hunters, many people who live on the cities are simply descendants of the first and live mainly normal lives, albeit on the backs of massive vehicles. Others who flock to these cities might not even come for the hope of a wish at all but instead for the technological marvel that the cities themselves are.