Pandemonium

The Windswept Depths of Pandemonium is the plane of chaotic neutral and chaotic evil alignment.

Geography

Pandemonium is made entirely of rock pierced by innumerable tunnels and caverns large and small. All open space is filled with howling winds that carry the sound of every word, shout, or scream uttered in the place. Without adequate protection, beings with hearing are rendered temporarily deaf in a matter of seconds and permanently deaf in a few minutes. Normal fires can't survive and there is no natural light. Conversation can only be accomplished by shouting at close range.
Gravity in Pandemonium always pulls away from the center of any cavern so a traveler can walk on the floor, walls, or ceiling. Streams and rivers flow along one surface of a cave, or inexplicably down the middle through the air. The larger caverns are hundreds to thousands of miles deep, wide, and tall, and the winds there can lift up small humanoids 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 and the Abyss is called Pandesmos and is the most habitable layer of the four. This layer has the largest caverns and the river Styx flows through the rocky wastes. Nearly all great cities and citadels in Pandemonium are found here.

Cocytus The second layer is called the layer of lamentation because the wind whistling through the tunnels carries the cries of anguish and the sounds of sorrow. The passages on this level are 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 are carved by beings unknown to even the gods.

Phlegethon

The third layer is the layer of dark and damp. The walls are matte black and absorb all light with no reflection—all light sources 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 is the deepest known layer of Pandemonium and is made of solid rock with no tunnels and only giant spherical bubbles of air or vacuum. Those bubbles with a barrier to Phlegethon are filled with huge windstorms capable of flinging even large humanoids around. Pockets without a connection to the next level are often the final resting places of things that should not be awakened.

Fauna & Flora

Pandemonium has no known indigenous life forms but many inhabitants that are either immigrants, visitors, exiles, marooned, or prisoners. Quasits and shadow demons are plentiful, as well as many low- to mid-level demons and the occasional demon lord-in-exile.

Alternative Name(s)

The Windswept Depths

Type

Planar Sphere/Grouping