The Last Conduit

In the subterranean megacity of Vaelis, a low-tier maintenance engineer named Kael uncovers an anomaly in the city's central power grid—a silent, black crystalline core that reacts to human thought rather than raw voltage. Pursued by the city's ruthless enforcers, he must escape to the surface with a rogue scholar to reveal that the city's endless power supply is actually draining the life force of the world above.