Fantasy and science fiction have always overlapped a little. In post-apocalyptic fantasy you have permission to combine both a little more freely. I am going to swing at this idea which has been bouncing around in my head for a while. This is also pulling a good deal from my recent post about God Thrones, a post apocalyptic fantasy setting in my head of late. The idea of course can work in other settings. As an example, is a crashed spaceship in the classic Mystara setting. That ship is leaking radiation and causing a range of problems. This might fit in there.
Anyways….here we go