Nemenar is an enigmatic planetoid orbiting a brown-dwarf star, entirely encapsulated by a massive black-light filter constructed millennia ago. This filter allows only ultraviolet light through, shrouding the planet in shadow for those without blindsight or special equipment. The sole sapient species, nemenaris, are a cursed people. Long before the Gap, they were a scientifically advanced spacefaring race. During exploration, they discovered an asteroid with a small shrine containing a 4-foot statue of an unknown deity and an amethyst offering bowl. One scientist left an offering—an empty vial—and the crew returned home to find their entire planet ablaze in violet mystical fire. Though no one died, all organic matter suffered perpetual agony when exposed to visible light from their sun. Scientists discovered Nemenar had been eternally cursed: any surface-originating material exposed to visible sunlight bursts into unrelenting flame. Refusing to abandon their world, nemenaris constructed a barrier blocking all visible wavelengths. Over millennia, flora, fauna, and nemenaris adapted to ultraviolet light, developing vision attuned to it. Today, most nemenaris live underground in prosperous, scientifically advanced settlements. Their government is enigmatic: they elect a cosmocrat, a powerful magic user who spends their life communing with the curse deity, now known as Nylessa, and guiding the people away from further catastrophe in exchange for gifts of discovery and prosperity. Despite its unusual circumstances, Nemenar is a bustling tourist hub. Nemenaris have built thousands of crystalline prismatic spires that project visible light, and surface settlements painted in phosphorescent colors accommodate visitors. The planet features diverse cooler biomes: taigas, cool sand deserts, tundra, nitrogen oceans, and towering ice-capped mountains.