 According to Ken Rolston, the beholder and the mind flayer "win starring roles as intergalactic menaces" in Spelljammer, describing the mind flayers as "evil, brain-sucking horrors who have polished up their social skills sufficiently to present a dubiously neutral facade to trading partners as they secretly scheme toward the day when all intelligent races will be their vassals and brain-food".Mind Flayers are one of the primary factions in the "Spelljammer" campaign setting.While less prominent than the neogi, illithids are in complete control of Glyth, a Realmspace planet, and have been for millennia.