Luminosa Phantasmagoria, a rare bioluminescent fungal species in the Galactic Mycelium cluster (Order Agaricales, Family incertae sedis), exhibits a convex to slightly umbonate cap with granular warts emitting soft bluish light (400-480nm) and iridescent purples, blues, and golden-orange spots. Its delicate luminous gills contrast with a robust, textured stipe up to 15 cm tall, showing luminescent dots near the base. Endemic to tropical caves (10-20°C), it thrives on decomposing organic matter in humid microhabitats, playing a saprotrophic role in nutrient cycling. Bioluminescence arises from a luciferin-luciferase system, with dynamic light modulation likely aiding spore dispersal via attraction of cave fauna.