Bilming Underground Tunnel Complex

Bilming Underground Tunnel Complex appears in Mistborn.

The Bilming Underground Tunnel Complex emerges in The Lost Metal as a vast, labyrinthine network beneath the city of Bilming, originally constructed as a hidden supply route for the Set's covert operations. Over the course of the novel, the tunnels evolve from a concealed logistical asset into a critical battleground where the fate of Scadrial hangs in the balance. As the story unfolds, the complex transforms from a secretive passageway into a sprawling subterranean arena of espionage, sabotage, and climactic confrontation, ultimately serving as the stage for the series' most explosive revelations about the Set's true ambitions.