Pandemonium Pandemonium was the Great Wheel cosmology plane of chaotic neutral and chaotic evil alignment . Some characteristics of this plane were ascribed to the Deep Caverns in the World Tree cosmology model which was later renamed the Dismal Caverns by the World Axis cosmology model . Description . Pandemonium was made entirely of rock pierced by innumerable tunnels and caverns large and small . All open space was filled with howling winds that carried the sound of every word , shout , or scream uttered in the place . Without adequate protection , beings with hearing were rendered temporarily deaf in a matter of seconds and permanently deaf in a few minutes . Normal fires could not survive and there was no natural light . Conversation could only be accomplished by shouting at close range . Gravity in Pandemonium always pulled away from the center of any cavern so a traveler could walk on the floor , walls , or ceiling . Streams and rivers would flow along one surface of a cave , or inexplicably down the middle through the air . The larger caverns were hundreds to thousands of miles / kilometers deep , wide , and tall , and the winds there could lift up small humanoid s and carry them far away before a dangerous landing . Pandemonium had four known layers , each with slightly different conditions : Pandesmos . The topmost layer with portals to Limbo , the Abyss , and Concordant Opposition was called Pandesmos and was the most habitable layer of the four . This layer had the largest caverns and the river Styx flowed through the rocky wastes . Nearly all great cities and citadels in Pandemonium were found here . Cocytus . The second layer was called the layer of lamentation because the wind whistling through the tunnels carried the cries of anguish and the sounds of sorrow . The passages on this level were narrower making the noise shrill enough to drive " insane " anyone with unprotected hearing . Unlike the natural looking tunnels and caves of Pandesmos , the passages of Cocytus were carved by beings unknown to even the gods . Phlegethon . The third layer was the layer of dark and damp . The walls were matte black and absorbed all light with no reflection — all light sources could only illuminate half as far as normal . Many rivers and streams cut through the black rock and the constant dripping of eons built up stalactites , stalagmites , and other cave formations . Agathion . Agathion ( a - GAY - thee - on ) was the deepest known layer of Pandemonium and was made of solid rock with no tunnels and only giant spherical bubbles of air or vacuum . Those bubbles with a barrier to Phlegethon were filled with huge windstorms capable of flinging even large humanoids around . Pockets without a connection to the next level were often the final resting places of things that should not be awakened . Inhabitants . Pandemonium had no known indigenous life forms but many inhabitants that were either immigrants , visitors , exiles , marooned , or prisoners . Quasit s and shadow demon s were plentiful , as well as many low - to mid - level demon s and the occasional demon lord - in - exile . Afterlife . Only the spirits of the most merciless bugbears traveled to Pandemonium after death .