COCYTUS
The tunnels of Pandemonium narrow considerably in Cocytus, creating more dangerous windstorms that bring death and madness. Much of this layer has the appearance of ancient worked stone, and some planar scholars believe the barriers between the multiverse and the alien Far Realm are weakest on Cocytus. The worked stone of the tunnels and caves may be remnants of Far Realm cities, and the titanic ruins of Shothra, a city of elder things, are tucked away somewhere. Unfortunately, the tunnels also carry the greatest number of loathsome slimy monsters, such as shoggoths, oozes, and other foul monsters.
Comments