Introduces cryptochrome proteins and iron-oxide nanocrystals into the ethmoid bone and retinal cells, granting the user an innate sense of magnetic north and geomagnetic field variations. The user always knows which direction they're facing, can sense their approximate latitude by field inclination, and can detect magnetic anomalies in their environment — buried metal, electromagnetic equipment, and geological features. The sensation is subtle — a gentle 'pull' toward magnetic north that becomes second nature within weeks. Users report that losing the sense (in magnetically shielded rooms or near strong magnets) is disorienting in the same way that sudden darkness is disorienting to a sighted person. Zheng-Dao Bioelectric offers an enhanced version that includes sensitivity to artificial magnetic fields, allowing users to navigate by the electromagnetic signatures of GLMZ's infrastructure.