World that is entirely a dungeon
So, I had a little idea the other day. I call it "Dungeon World" just to cause confusion. But it's also literally a world of dungeons 😏 . No, literally. There is no natural landscape in this world. It's all dungeons.
It was originally built by unknowable creators in some unknowable time in the past. Since then, mages from various planes of existence discovered the place and decided to add their own touches.
Many peoples live here. To them, the thought of a world not made by the Makers is just freaking weird. Mountains of just solid rock? Preposterous. Only the great edifices of the Makers or the Mage-Kings that followed should reach towards the skies. Food is something you get from the Garden-Cemeteries of Ceres. Or maybe you hunt it in the Underworld.
Journey deep enough and you find the Columns That Hold The World. Great hexagonal pillars made of a substance that bends light and slows time around them. Further down you find the Mausoleum Cities where the Mage Kings in their hubris staked their claim. Little did they know that they disturbed the Ergatis - a breed of Insectfolk that the First King made.
A new world waits below that again, beneath the ossuary layers. Where billions of skeletons lie, witnessing a horrific event. It is not recommended to stay here for long. Below is the Cistern World, where the Makers built great pools as large as oceans. Here is the sanctuary of all aquatic creatures that would be seen as monsters in their homeworlds.
Finding access to the depths below here are difficult, as they are intentionally hidden on artificial islands or submerged in the reservoirs. Some take that as a sign that they should now travel further down, but others don't heed warnings that well.
While the Makers were generous with light in the worlds above, below the Cisterns there are only faint lights and many shadows. Some shadows stir on their own accord. You probably should not have come here. Who's whispering?