The Windswept Depths of 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.
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 humanoids and carry them far away before a dangerous landing.
Pandemonium had four known layers, each with slightly different conditions:
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.
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.
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 (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.
Pandemonium had no known indigenous life forms but many inhabitants that were either immigrants, visitors, exiles, marooned, or prisoners. Quasits and shadow demons were plentiful, as well as many low- to mid-level demons and the occasional demon lord-in-exile.
Only the spirits of the most merciless bugbears traveled to Pandemonium after death.
- Talos the Destroyer had a realm here.
- Auril the Frostmaiden's palace and realm of Winter's Hall was located in Pandemonium.
- Ibrandul, the Lord of the Dry Depths, called the caverns of Phlegethon—or more specifically, his realm of Ibrandyllaran—home until he was slain during the Godswar by Shar, deep within Undermountain where his remains were left petrified.
- Cyric, the Black Sun, moved his realm, the Shattered Castle (though he called it "The Castle of the Supreme Throne"), to Pandemonium after residing in Hades before.
- Hruggek the god of bugbears had a great fortress decorated with grisly trophies of those who trespassed.
- Targus, the Netherese god of war, lived here.
- Hidden Betrayal was the realm in Phlegethon of the derro god Diirinka.
- Kar'r'rga, the Dread God of the sartani resided here.
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 Jeff Grubb (July 1987). Manual of the Planes 1st edition. (TSR), p. 100. ISBN 0880383992.
- ↑ Jeff Grubb (April 1987). “Plane Speaking: Tuning in to the Outer Planes”. In Roger E. Moore ed. Dragon #120 (TSR, Inc.), pp. 42–43.
- ↑ 3.0 3.1 Jeff Grubb (July 1987). Manual of the Planes 1st edition. (TSR), p. 73. ISBN 0880383992.
- ↑ Jeff Grubb (July 1987). Manual of the Planes 1st edition. (TSR), p. 75. ISBN 0880383992.
- ↑ 5.0 5.1 5.2 Jeff Grubb (July 1987). Manual of the Planes 1st edition. (TSR), p. 99. ISBN 0880383992.
- ↑ Jeff Grubb, Bruce R. Cordell, David Noonan (September 2001). Manual of the Planes 3rd edition. (Wizards of the Coast), pp. 96–99. ISBN 0-7869-1850-8.
- ↑ Mike Mearls, Jeremy Crawford, Christopher Perkins, James Wyatt (2014). Dungeon Master's Guide 5th edition. (Wizards of the Coast), p. 58. ISBN 978-0786965622.
- ↑ Richard Baker, James Wyatt (March 2004). Player's Guide to Faerûn. (Wizards of the Coast), p. 148. ISBN 0-7869-3134-5.
- ↑ Bruce R. Cordell, Ed Greenwood, Chris Sims (August 2008). Forgotten Realms Campaign Guide. (Wizards of the Coast), p. 63. ISBN 978-0-7869-4924-3.
- ↑ Frank Mentzer (January 1985). “Ay pronunseeAYshun gyd”. In Kim Mohan ed. Dragon #93 (TSR, Inc.), p. 25.
- ↑ 11.0 11.1 Jeff Grubb (July 1987). Manual of the Planes 1st edition. (TSR), p. 101. ISBN 0880383992.
- ↑ Jeff Grubb, Ed Greenwood and Karen S. Martin (1987). Forgotten Realms Campaign Set (Cyclopedia of the Realms). (TSR, Inc), p. 15. ISBN 0-8803-8472-7.
- ↑ Jeff Grubb and Ed Greenwood (1990). Forgotten Realms Adventures. (TSR, Inc), p. 32. ISBN 0-8803-8828-5.
- ↑ 14.0 14.1 Colin McComb (1996). On Hallowed Ground. (TSR, Inc), p. 181. ISBN 0-7869-0430-5.
- ↑ Jeff Grubb, Ed Greenwood and Karen S. Martin (1987). Forgotten Realms Campaign Set (Cyclopedia of the Realms). (TSR, Inc), p. 10. ISBN 0-8803-8472-7.
- ↑ Jeff Grubb and Ed Greenwood (1990). Forgotten Realms Adventures. (TSR, Inc), p. 15. ISBN 0-8803-8828-5.
- ↑ Julia Martin, Eric L. Boyd (March 1996). Faiths & Avatars. (TSR, Inc), pp. 71–72. ISBN 978-0786903849.
- ↑ Julia Martin, Eric L. Boyd (March 1996). Faiths & Avatars. (TSR, Inc), p. 51. ISBN 978-0786903849.
- ↑ Jeff Grubb and Ed Greenwood (1990). Forgotten Realms Adventures. (TSR, Inc), p. 17. ISBN 0-8803-8828-5.
- ↑ Colin McComb (1996). On Hallowed Ground. (TSR, Inc), p. 63. ISBN 0-7869-0430-5.
- ↑ James M. Ward, Robert J. Kuntz (1980). Deities and Demigods. (TSR, Inc), p. 105. ISBN 0-935696-22-9.
- ↑ slade, James Butler (November 1996). Netheril: Empire of Magic (Encyclopedia Arcana). (TSR, Inc.), p. 33. ISBN 0-7869-0437-2.
- ↑ Colin McComb (1996). On Hallowed Ground. (TSR, Inc), p. 83. ISBN 0-7869-0430-5.
- ↑ David Cook (October 1992). Golden Voyages (Al-Sartan). (TSR, Inc), p. 8. ISBN 978-1560763314.
Prime Material plane • Feywild • Shadowfell
Transitive Planes: Astral Plane • Ethereal plane
Inner Planes: Elemental Plane of Air • Elemental Plane of Water • Elemental Plane of Earth • Elemental Plane of Fire • Elemental Chaos
Para-Elemental Planes: Frostfell • Swamp of Oblivion • Fountains of Creation • Great Conflagration
Quasi-Elemental Planes: Lightning • Radiance • Minerals • Steam • Vacuum • Ash • Dust • Salt
Outer Planes: Arcadia • Mount Celestia • Bytopia • Elysium • Beastlands • Arborea • Ysgard • Limbo •
Pandemonium • Abyss (Layers) • Carceri • Hades • Gehenna • Nine Hells • Acheron • Mechanus
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Prime Material plane • Cynosure • Fugue Plane
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Celestial Outer Planes: Arvandor • Brightwater • Dwarfhome • Dweomerheart • Gates of the Moon • Golden Hills • Green Fields • House of Knowledge • House of the Triad
Fiendish Outer Planes: Abyss (Layers) • Barrens of Doom and Despair • Blood Rift • Clangor • Deep Caverns • Demonweb Pits • Fated Depths • Fury's Heart • Hammergrim • Nine Hells • Nishrek • Supreme Throne
Neutral Outer Planes: Dragon Eyrie • Heliopolis • House of Nature • Jotunheim • Warrior's Rest
Inner Planes: Elemental Plane of Air • Elemental Plane of Earth • Elemental Plane of Fire • Elemental Plane of Water • Positive Energy plane • Negative Energy plane
Prime Material plane
Fundamental planes: Astral Sea • Elemental Chaos
Astral dominions: Arvandor • Banehold • Celestia • Cynosure • Deep Wilds • Demonweb Pits • Dismal Caverns • Dwarfhome • Eternal Sun • Fugue Plane • Gates of the Moon • Green Fields • House of Knowledge • Nine Hells • Nishrek • Supreme Throne • Towers of Night • Tu'narath • Warrior's Rest
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Parallel planes: Feywild • Shadowfell
Anomalous planes: Far Realm