Our civilization is buried in fog and glass, the towers that stood as tall as mountains are now dwarfed by those horrid spires of glass that reach from the ground to the stars. Our monuments are nothing in comparison, and I wonder, will we even be remembered by those who succeed us?
— A woman from a forgotten civilization
Xoqiytz was a catastrophic event that occurred thousands of years ago, wiping out most of the civilizations living upon Qet the time. On top of this, causing a myriad of flora and fauna to go extinct, while also drastically reforming the landscape.
A Godly Blight
The catastrophe itself was caused by the eruption of a great boil that festered upon the flesh of the god Qetlon— whose expired body makes up the whole of Qet. The boil itself was as large as an entire continent, and resided in the center of what is now known as the Poulikyiz Ocean. That is, of course, until it popped.
Once it did, the various liquids and gases that had been accumulating within it for untold centuries were violently ejected; raining a rancid, corrosive liquid over the whole of the world, alongside a viscous murky green fog that crawled upon much of the planet's surface.
The rain, upon landing, would solidify, and build itself up into spires of yellow-tinted glass, drop by drop. And the fog would wrap its fat fingers around any who dared wander at too low an elevation— choking them slowly but surely to death. This continued for a period of three months, after which, the rains finally stopped, and the fog was finally lifted— like a great curtain had finally been drawn. The glass spires, however, would remain, and would deteriorate slowly over time— becoming a source of sustenance for various eldritch beings seeking to increase their own powers.
Those before us
The civilizations present upon Qet during the time of Xoqiytz were not, in fact, human.
Auroul: The Mother was yet to give birth to mankind, and so— those that populated the planet were instead parasites and other symbiotic creatures that lived within the dead god's body during their life.
Viruses, germs, cosmic lice— these beings were quite different from humanity, and the ruins they left behind reflect this. Their alien architecture only perplexing historians and explorers further.
Among those extinguished were the Lithoarians, a people made of wind. They built their cities in singular, grand towers— only one of which remains today.
Few of the civilizations that existed at the time were able to survive the Xoqiytz, some of their ruins still lying silent throughout the world today. Fossils, from the various fauna that were wiped out in the event, have also been excavated throughout the world— leading to wild speculation as to what these creatures once were, and what killed them off. Pieces of the boil's rim peak from above the waters of the Poulikyiz Ocean, creating a partial ring of sparse islands. In the caldera below lies a semi-isolated portion of the ocean wherein lives a unique variety of flora and fauna. In a few particularly isolated places within Qet, there still remain glass spires— most notably, in Nqet's great desert, where an entire valley was coated with glass after a bout of extreme heat caused several spires to melt.
Modern scholars have made note of the various ruins, and their shared technology— some have theorized that a great catastrophe must have occurred long ago, but this theory is not a particularly popular one.
Do you really believe that? I think something of that scale would have made itself much more evident.
— A skeptic
Entry for Worldbuilding Summer Camp 2020
Answering: "Write about the events of a devastating natural disaster in your world, either past or present."