Whither Krull?

In this 1983 science-fantasy movie, the planet Krull is invaded by an extraterrestrial conqueror known as The Beast who moves his space-capable stone dwelling (the Black Fortress) from planet to planet, consuming them. He has wormlike minions who either wear armour (Slayers) or who change shape (changelings).

There’s prophecy that says the Beast can be killed by an ancient weapon known as the Glaive which implies that either the Beast has been there for a long time or it’s movements among the spheres were known about.

It’s been done in an RPG in 2018.

Anyway. It was a cool thing despite it bombing as being derivative at the time. I don’t think reviewers could even have guessed how derivative the future would become.