The Flesh Fortress

From the introduction: The Flesh Fortress is a living tunnel complex, which lies in the world of Inshabiv. It is a forward base of the demonic incursion and is probably going to be the next site for a major breeding pool. It is a place of unrivalled evil and is run by a depraved demonic being, called the "Surgeon". The fortress is designed to challenge 4 players of level 10.