Lydia continued walking until the hallway opened up into a cavern. It smelled of mold and the sound of dripping water echoed off the walls. She stepped on something squishy and recoiled. She bent down to get a better look and saw it was a mushroom that started to glow green. The rat leapt from her pocket and bounded from mushroom to mushroom. Several minutes later, it returned and the cavern was bright enough for her to see.