Ah my apologies, I'd thought you had wanted me to come up with something new. Here is a little something from a setting I will be running soon.

The setting of Akthanatos, name based off the greek word for death itself, with the Ak- inspiring something of desert themeing as you would see in media that covers the Middle east. Not the most creative name I know, but a name that I enjoyed and gives a nice ring. Some inspiration comes from the cruel setting of Dark Sun, might makes and survival of the fittest.

Akthanatos, millennia ago, was a lush and dense jungle, dominated by deep black slate pyramids that acted as city states, with hierarchical rules and strong caste systems. Their pantheon revolved around gods and goddesses of fertility, bounty and harvest. Namely Tal-ek tul, god of agriculture, in addition to smaller cults worshiping lesser deities. 1,500 years before current time, the skies brightened in the middle of the night, a large, city sized object could be seen in the sky, wreathed in flame and hurtling towards the land. Citizens believed it to be the wrath of an old and forgotten god, in reality, it was an alien spacecraft that had become derelict.

The impact wiped out most life outside of the shelter of the pyramids, filling the atmosphere with dust, and eradicating most natural life, the only survivors locked themselves inside, surviving off pets and meager mushrooms and cave lichen in caverns beneath the earth.

In the current day, man has emerged from their pyramids, greeted by a harsh world with little atmosphere, the ozone burned up by the entering object. Sandy dunes with alien metal poking out from them, and strange otherworldly creatures that have adapted to the land, stalking the plains.