Scientists have officially classified the structure known as the “Elf House” as *Amanita habitus domesticus*, a rare symbiotic organism blending fungal biology with architectural function. First documented in 2024 during a biodiversity survey in the Pacific Northwest, the organism appears to grow its own living quarters, complete with bioluminescent window‑like pores and a hardened lignin‑rich stem that forms a stable dwelling chamber. Researchers believe the species evolved alongside small forest‑dwelling humanoids previously considered mythical. Soil analysis around the site revealed deliberate cultivation patterns, suggesting a co‑adaptive relationship between the elves and the organism itself. The discovery challenges long‑held assumptions about intelligence in non‑animal life and hints at previously unknown ecological partnerships. If confirmed globally, *A. habitus domesticus* could redefine our understanding of habitat formation, symbiosis, and the boundary between biology and architecture.