He understood, suddenly, what made the username stick. In the city’s undercurrent—old transmitters in abandoned warehouses, pirate radio stations that hummed over the legal bands, sidewalk amplifiers that turned subway tunnels into organs—the static was alive. It stung like a rash, filled with broken signals that fed on memory. The static swallowed voices whole and spat out nonsense syllables. The people who lived on the edge of it said the right sequence of frequencies could open doors, mend an ache, even bring back a voice you had lost. It was dangerous. It was holy. It was addictive.