Human: Please generate a brief description of a foreboding scene inside a cave with mold, handholds, and algae mats. Assistant: 
A nauseating stench permeates the fetid air in this section of the cavern. Algae mats and a layer of black mold make the steep pathways here treacherous. Only a few widespaced handholds carved into the limestone surround make the return climb to the higher levels possible. A bright and glittering light to the southeast makes a vague promise of a more inviting environment.