Barnaby and Phoebe, apprentices managing light gels and glass bulbs, discover that their materials are losing their charge due to the ongoing resonance drain, similar to issues faced by other apprentices with ribbon and structural integrity. They deduce they need the Grotto Seal green stones from the deep storage sub-level to stabilize the lantern colors. Upon accessing the sub-level, they find the Grotto Seal stones are packed in the rare, heat-retaining clock weight felt. However, a sudden, intense resonance spike hits the area, instantly neutralizing the color and stabilizing power of an exposed Grotto Seal stone. Barnaby and Phoebe manage to reseal the crate, realizing they must find a way to line the container with the felt to protect the stones during transport before they can treat the lanterns for the main lighting ceremony.