Mycetons are fungus-folk — sentient, humanoid-shaped fungi (or masses of fungi) — who live underground in large colonies. In battle, they mainly fight with weapons (favoring clubs and club-like weapons such as maces), but can also emit small, short-range clouds of spores that sting the eyes. Some have other spore weapons as well. They rarely wear armor, relying instead on their natural resilience. They have no obvious eyes or other sensory organs.
The companions encountered the Myceton when they first fell from Gashearth into the Sunless Realms, dropping from a cavern behind a crypt in Gashearth into a cavern occupied by the fungal-creatures.