human
Produce a detailed written description of a spooky cave in the wilderness with lichen and phosphorescent light.
assistant
A narrow track ends abruptly where a massive shoulder of black granite juts from the side of the mountain. Part of the cliff has collapsed, leaving a great jumble of fallen rock that partially blocks a dark cave mouth. A thick blanket of yellow-green lichen spreads over much of the area, aglow with a dim patches of phosphorescent light.