Mycelius Luminatus, from Latin for 'fungus threads' and 'illuminated,' is a bioluminescent fungus emitting a blue-green light (470-530 nm). It has convex to broadly flabelliform caps (5-25 cm) with translucent amber to warm orange hues, intensifying near densely packed, adnate gills that radiate from the robust, ochre stipe anchored in temperate forest soils. Bioluminescence, driven by a luciferin-luciferase system, originates mainly from gills and cap margins, likely attracting nocturnal spore dispersers. Within the Enigmatic Mycocluster genus (~40 species), it thrives at 5-25°C as a saprotroph decomposing lignin and cellulose, aiding nutrient cycling. Spore dispersal utilizes air currents and insect attraction. The dense mycelial mat supports fungal growth and soil health. Listed Near Threatened, habitat conservation is vital for this species' ecological role.