I've this weird fanfiction where LessWrong is a monastery/school of magic who has been abandoned by its creator a long time ago but it's still operating, that sometimes has been attacked by a disgruntled student who was expelled, but has somehow learned to do necromancy and has returned with an army of meat-puppets.
Now I'll have to incorporate that due to some random magic accident, the monastery disappeared, but not the rooms inside it.