Palimpsest
The sinking city of Palimpsest is an enormous walled citadel, towering up into the sky like a colossal Tower of Babel. Situated directly under the highest star of Salsabil, as far as any of its inhabitants know, Palimpsest is the only non-ruined settlement anywhere in the Screaming Desert, a ghoul-infested wasteland of rolling sand dunes and barren rock outcrops stretching in every direction as far as the people of Palimpsest have ever been able to explore.
The most notable feature of the city is that it sinks. Whether a simple consequence of its own weight being too much for the unstable sands of the desert, or the results of some ancient magic, or even – as a few pessimistic individuals suggest – an effect of the sins of the city’s inhabitants gradually dragging them closer to the Opposite Sky, whatever the cause, the city of Palimpsest sinks into the ground an inch or two per day.
To combat this, the city’s authorities are constantly building upwards – the walls stacked higher and higher to keep their ramparts out of reach of the Ghouls below, and the towers within ever stretching towards the sky as their inhabitants periodically move and resettle upwards in response to homes and streets below being swallowed up by the ground.
Meanwhile, a little lower down, as demand increases for space at higher levels, new buildings and gardens and walkways and connecting bridges are squeezed in wherever there’s room between the towers, gradually merging into fully covered streets, which sooner or later are inevitably vacated to be repurposed as basements and cellars, then as sewers and maintenance tunnels, then as forgotten catacombs, then finally abandoned by the surface-dwelling species entirely and populated by more insular and secretive subterranean species with designs of their own.
Whatever the reason for the city's descent, as the city sinks below the sands of the Screaming Desert, the inhabitants of the city build upwards, climbing ever higher towards the stars.
Defences
The city is protected from the Ghouls by the staggeringly thick stone Wall that fully encloses the city itself, and by the various automated munitions built into the Wall and powered by clockwork and gears and elementals bound by magic, and by the regular patrols of similarly bound elementals and genies enslaved by the city’s ruling classes.
Districts
The districts of Palimpsest are situated one on top of the next, with the more affluent districts located higher up the city, and the poorer districts at ground level and below. The districts are described here highest to lowest.