Terminus (Starfinder)

From publisher blurb: The Pit of Despair A dead world, a fading and nameless red sun, a virtually uncharted system, and a name whispered in fear and dread: Terminus. Inside its endless tunnels, the dregs and scoundrels of the galaxy mix with generations who have never breathed free air in a tainted ultramax prison where black flames consume soul and flesh while soulless wardens keep their pitiless vigil. New drugs, gear, and hazards await, along with a detailed planetary gazetteer, adventure hooks, and the deadly Terminus warden and blackfire wight!