Layers of the Abyss

Each layer of the Abyss is different from all the others, the only apparent similarity being that the plane seems to try and inflict as much harm on travelers with each layer as possible. It might even be said that the plane is as varied and evil as the demons who inhabit it. Even deities dwell in the Abyss, like Umberlee and Merrshaulk, as well as Demon Lords that are mostly worshiped by one kind of species, such as Sess'innek, the lord of lizardfolk who makes his home on the seventh layer, Phantom Plane, and Vaprak, patron of ogres, ogre mages and trolls. Vaprak is located on the layer of Shatterstone. Lolth used to occupy the 66th layer as the Demonweb Pits, but during the Silence of Lolth, she moved her domain from the Abyss to a plane of her own making, leaving the 66th layer a desolate wasteland, bereft of any life, mortal or otherwise.

List of Known Layers

 * 1: Plane of Infinite Portals, Pazunia
 * 2: Driller's Hives
 * 3: The Forgotten Land
 * 6: Realm of a Million Eyes
 * 7: Phantom Plane
 * 12: Twelvetrees
 * 13: Bloodtor
 * 21: The Sixth Pyre
 * 23: The Iron Wastes
 * 45-47: Azzagrat
 * 49: Shaddonon
 * 66: The Remains of the Demonweb Pits
 * 73: The Wells of Darkness
 * 74: Smaragd
 * 88: Gaping Maw, also known as Abysm
 * 89: The Shadowsea
 * 113: Thanatos
 * 176: Hollow's Heart
 * 181: The Rotting Plain
 * 222: Shedaklah
 * 223: Offalmound
 * 230: The Dreaming Gulf
 * 241: Palpitatia
 * 248: The Hidden Layer
 * 348: The Fortress of Indifference
 * 399: The Worm Realm
 * 421: White Kingdom
 * 422: The Seeping Woods
 * 487: Lair of the Beast
 * 489: Noisome Vale
 * 524: Shatterstone
 * 531: Vudra
 * 570: Shendilavri
 * 586: Prison of the Mad God
 * 600: Endless Maze
 * 601: Conflagratum
 * 663: Zionyn
 * ???: Slugbed

Descriptions of Known Layers
This is the realm of Sess'innek.
 * Layer 7: The Phantom Plane

This is the realm of Umberlee and Beshaba.
 * Layer 13: Blood Tor

This is the realm of Lolth and Selvetarm.
 * Layer 66: The Demonweb Pits (formerly)

This layer contains Sseth's realm, the Viper Pit, as well as the realms of Merrshaulk and Ramenos.
 * Layer 74: Smaragd

This was the realm of Kiaransalee until she was forced to flee by the return of Orcus.
 * Later 113: Thanatos

This is the realm of the troglodyte god Laogzed.
 * Layer 181: Rotting Plain

This was Moander's realm before his death.
 * Layer 223: Rarandreth

This is the realm of the bugbear deities Skiggaret and Grankhul.
 * Layer 241: Palpitatia

This is the realm of the gnome god Urdlen.
 * Layer 399: Worm Realm

This is the realm of the ogre and troll god Vaprak.
 * Layer 524: Shatterstone