Apprentices Quill and Beryl are tasked with checking Sub-Level Three Section Gamma, which is supposed to be sealed. They find the access hatch lock dissolving into a dry, ash-like substance, indicating a form of consumption that is not related to the previously observed cold or density drains. This suggests a new, terrifying elemental threat. Inside the archive, they discover a pool of absolute darkness absorbing their spectral light and emitting a rhythmic sucking sound, which they connect to the kinetic pounding felt above ground. They realize this darkness is actively consuming the deeply restricted First Light Pigment Reserves, the town's primary reserve of high-intensity thermal energy. Trapped between the compromised exit hatch and the absorbing void, Quill and Beryl recognize the immediate danger to the Star Seed ignition point above them, escalating the crisis from sabotage to a fundamental theft of essential energy.