[ericthered]

This is more of a gimmic than a full setting, but a DF style setting where a world-altering calamity from somewhere else occurs about once a month. Demon invasions, all the dead rise from the ground, the sun is blotted out from the sky, wells of magic rise up in various places, the geography gets scrambled, most of the world burns... various world-ending disasters that never seem to actually get the job done, but keep the world stocked with monsters and ever-changing danger.