I dreamt that I was trapped on a planet in a colony star system that had sort of descended into barbarism. Magic was real, and one of the main centers of government was the School of Magic, highly reminiscent of Hogwarts, without the forest around it. I believe there was an alternative community that opposed the magicians, and that relied on old 20th century technology.

Imprisoned in the School of Magic was a powerful wizard who happens to be played by Alan Rickman, who had caused the destruction of the moon that orbited this colony world. Unfortunately, this moon happened to be likewise inhabited, and lots of its inhabitants were killed in the aforementioned destruction. Some, however, managed to escape, and they live as refugees on the main world, while others have managed to subsist in the resultant asteroid fields in the Lagrange Points, depending on interstellar piracy as their main source of income.

In this dream, I think I may have been a Terran who had someone gotten stranded on this backwards planet, and I kept hoping for a ship to rescue me. Eventually one comes, which leads to all sorts of turmoil and upheaval.

I think the aforementioned powerful wizard destroyed the satellite world in a misguided bid to impress a woman he loved. This naturally does not yield the expected results.