| Abyss, the | Planes | - | The lower plane, sectioned into 666 layers, inhabited by the demons of chaotic evil and destination of chaotic evil souls | ||||
| Agathys | Planes | - | Layer of Carceri | ||||
| Akachta | Planes | 1602 | Ancient Mind Flayer Elder Brain from the Imperial Age | ||||
| Amber Hypothesis | Planes | - | Theory that there is only one True Prime Material and the others are shadows | ||||
| Arcanosphere | Planes | - | The invisible field of magical energy permeating all planes, powers and conducts magic | ||||
| Arnora | Planes | - | Sealed demiplane in the Realm of Law; prison of Cain the First Vampire | ||||
| Avernus | Planes | - | Uppermost of the Nine Hells, a land of ash, flame & war, a frontline in the Blood Wars. | ||||
| Blood War | Planes | - | The eternal, merciless, planes-spanning conflict between Hell and the Abyss. | ||||
| Braxis, Port | Planes | - | Temporary port city on Porphatys, maintained by devils mining semi-solid acid | ||||
| Carceri | Planes | - | The neutral evil prison plane | ||||
| Cathrys | Planes | - | Layer of Carceri | ||||
| Choclatal | Planes | - | Hot, sweet drink, reputedly from a parallel Prime Material plane, popular among planewalkers | ||||
| City Forever | Planes | - | The city perched on the edge of the Positive Material Plane from whence the Seeds of Life are gathered | ||||
| Clodius | Planes | 1608 | Beholder in Sigil | ||||
| Colothys | Planes | - | Layer of Carceri | ||||
| Culusa | Planes | 1608 | Human mercenary and Beholder cultist, working for Clodius in Sigil, killed by Surya and Hildraft | ||||
| Death Hounds | Planes | - | Monstrous hounds, bred and used by Bramandin the Mortal Hunter | ||||
| Devil | Planes | - | Fiends of a lawful evil nature, inhabitants of the Nine Hells. | ||||
| Flickership | Planes | - | Vessels that harvest the Seeds of Life | ||||
| Gates of Life | Planes | - | Nexus on the edge of the Positive Energy Plane from which the Seeds of Life emerge | ||||
| Githmorein | Planes | - | Semi-human psionic race of warriors enslaved by the Mind Flayers | ||||
| Githyanki | Planes | - | Semi-human psionic race of baroque warriors native to the Astral Plane | ||||
| Githzerai | Planes | - | Semi-human psionic race of monastic individuals native to the Astral Plane | ||||
| Hallows, the | Planes | 1601 | Demiplane created co-operatively by all the Gods to provide a safe place to store Zero-One; to prevent it being used to free Cain among other things | ||||
| Heppetah | Planes | - | Plane used by the resurgent Imperial Mind Flayers | ||||
| Hollow Knights | Planes | - | Twelve empty suits of knightly armour blended of spirit and construct, eternally obsessed with the destruction of the undead | ||||
| Jart | Planes | 1602 | Ancient race, enemies of the elves before their arrival on Alair | ||||
| Kareth | Planes | - | Low-magic plane in the Outlands, hiding place of Ancorir | ||||
| Khemla Sidira | Planes | 1602 | Castle in the Astral Plane, home of Vlaakith the lich-Queen of the Githyanki | ||||
| Mind Flayer | Planes | - | Mauve psionic brain-eating race, once rulers of an interplanar empire | ||||
| Minethys | Planes | - | Layer of Carceri | ||||
| Modron | Planes | - | Lawful neutral paramortals inhabiting the clockwork plane of Mechanus | ||||
| Naratyr | Planes | - | Orcus' capital on Thanatos | ||||
| Neogi | Planes | - | Spider-like, slave-trading, rapacious merchant creatures | ||||
| Nine Hells, the | Planes | - | The lower plane, sectioned into nine layers, inhabited by the devils of lawful evil and destination of lawful evil souls | ||||
| Orthrys | Planes | - | Layer of Carceri | ||||
| Outlands | Planes | - | A planar region, part of the Outer Planes but seperate from the Wheel of the God Planes. | ||||
| Planes of Existence | Planes | - | Structure of the Planes of Existence | ||||
| Plato | Planes | 1608 | Beholder in Sigil | ||||
| Porphatys | Planes | - | Layer of Carceri | ||||
| Quaydah | Planes | 1608 | Djinni living in Sigil | ||||
| Sarkrith | Planes | - | Reptillian race, fanatical haters of magic in all its forms | ||||
| Sarugost | Planes | 1602 | The abandoned and desolate Material plane whence the Elves and Jart came. | ||||
| Seeds of Life | Planes | - | The source of the structure of divine spells | ||||
| Sigil | Planes | - | City located in the centre of the Neutal Outlands, in the middle of the Great Wheel of Outer Planes | ||||
| Soul Harvest | Planes | - | The flow of the souls of the dead from the Material planes into the Outer (God) planes, as determined by their faith and conduct | ||||
| Standish | Planes | 1608 | Hotelier of the Tower in Port Braxis on Porphatys, Carceri. Florid, gothic and baroque | ||||
| Tariclya | Planes | - | Eighth plane of Hades, once home of the Varnimora | ||||
| Taurnor | Planes | - | 421st Plane of the Abyss | ||||
| Thafistolic | Planes | 1608 | Human Thrall of Dispater, tempted the planetar Shenshal to evil, slain by Hildraft | ||||
| Thanatos | Planes | - | Layer 113 of the Abyss, Orcus' home plane | ||||
| Varnimora | Planes | - | A race of beings of great power, original inhabitants of Tariclya | ||||
| Varnimora Tower | Planes | - | Great shaft linking many lower planes | ||||
| Well of Souls | Planes | - | The throne-hall of Orcus on the plane of Thanatos, in the city Naratyr | ||||
| Zerhal Avara | Planes | 1601 | Cambion half-devil, general of Avernus, holder of Zero-One, slain in Reital | ||||
| Zeril | Planes | 1608 | Human mercenary and Beholder cultist, working for Clodius in Sigil, killed by Surya and Hildraft |