In my search for science-fantasy films to watch for Artume inspiration, I revisited Krull, an odd low-budget wonder from 1983.
The weird science-fantasy of it is interesting and really shows how different many works of speculative fiction, no matter the art form, all the way up to and through the 1980s were blurring the sub-genres. There was a real chocolate-in-the-peanut butter blending that often happened, enriching the stories and keeping things from getting too stale and cliché.
If you have seen it, I suggest watching it again to mine for ideas, and if you have never seen it, you are in for a real B-movie blast from the past.