Bilming Subway Construction

Underground construction site with excavation tunnels and ongoing explosive work causing earthquakes; no completed subway visible.

The Bilming Subway Construction begins as a covert excavation project in The Lost Metal, where its tunnels and explosive work serve as the hidden infrastructure for the Set's military ambitions. Throughout the series, the site evolves from a seemingly mundane public-works endeavor into a critical staging ground for the production and deployment of advanced weaponry, ultimately revealing the city's true allegiance to external powers. Its unfinished tunnels become both a battleground and a symbol of the fragile line between progress and conspiracy.