Nasty, Brutish, and Short
The Fungoid Gardens of the Bone Sorcerer
The Fungoid Gardens of the Bone Sorcerer are a series of caves found in the Blighted Lands. They contain the work spaces of the Bone Sorcerer, his acolytes, and the Black alchemist Nyu-an. Several types of fungus grow there, which the Bone Sorcerer uses in his experiments, both sorcerous and alchemical.
Deeper in the caves, one finds caverns inhabited by deep ones. These have not been fully explored.
Of course, all this recently changed when adventurers from Remnant arrived, slew the Bone Sorcerer and his acolytes, and raided what they could find. They also poached Nyu-an for their own purposes. Since then, the Fungoid Gardens sit uninhabited save for whatever drugged Yellow Man slaves remained. And whatever horrors lurk within.