The stoneshroom is a type of mushroom found growing within the deep wastes of the Sludge. It functions as a mild drug that, when eaten raw, produces a significant pain and anxiety reducing effect.

While useful, its effects must be respected; careless use can induce highly reckless behavior in the user, stripping them of their natural caution. Because of its potent chemical properties, stoneshrooms are heavily sought after to be processed into a much stronger combat stimulant known as statica.