Substation Null is a decommissioned power relay hub occupying several interconnected levels beneath the northern stretch of The Shelf, accessible through maintenance tunnels, a handful of unofficial entry points, and one known surface entrance that most people who use it pretend doesn't exist. Originally constructed to manage power distribution for a now-demolished industrial sector, the station was officially abandoned during the infrastructure consolidation of the 2040s and subsequently removed from city maintenance records — an omission that was either bureaucratic error or deliberate, depending on who you ask.