The Planes

Beyond mortal Earth lie complete realities shaped by elemental power, living thought, divine purpose, ancestral memory, moral gravity and forces older than the gods.

The planes of existence possess their own landscapes, natural laws, peoples, histories and forms of authority. Some approach Earth through forests, shadows, dreams, sacred wells and ancient gates. Others require passage through the Astral Plane, Yggdrasill, the Infinite Staircase, divine roads or magic prepared with the care of a military expedition.

The Inner Planes provide the primal energies and elements of creation. Transitive planes and living routes hold distant worlds in contact. The Outer Planes give lasting form to great principles, divine societies, afterlives and cosmic consequence. Demiplanes and exceptional realms arise around dreams, wounds, prisons, constructed worlds and realities that follow stranger laws.

Moral gravity influences every Outer Plane, but each realm possesses a fuller identity. Bytopia turns goodness into shared labour. Arcadia cultivates peaceful order. The Great Mechanism makes law physically operational. Pandemonium converts uproar and failed communication into geography. The Abyss gives predatory appetite and destructive freedom worlds of their own.

On this page: Cosmology at a Glance | History of the Planes | Plane Directory | Planar Travel | Gods, Souls and Law | Planar Campaigns | Recommended Guides | Related Guides | Historic and Mythic Context

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Cosmology at a Glance

Planar scholars divide known existence into broad families. These categories describe how realities function and connect. They provide a working map rather than a claim that every plane occupies one fixed position.

• The Material Plane: The physical universe of stars, worlds, living bodies, mortal kingdoms and recorded history. Earth is the principal Material world of the campaign.
• Coterminous Worlds: Realities that overlap or approach the Material Plane, including the Fey World, Ethereal Plane and Shadow Plane.
• Transitive Planes and Structures: Realms and living routes that permit movement, communication or passage between otherwise separate realities.
• Inner Planes: The primal Energy and Elemental Planes from which life-force, dissolution, air, earth, fire and water enter later creation.
• Outer Planes: Independent realities shaped by enduring principles, divine cultures, moral gravity, afterlife traditions and outsider societies.
• Demiplanes and Exceptional Realms: Bounded, constructed, isolated, wounded or anomalous realities whose nature places them outside the greater families.

A divine realm can occupy territory within a greater plane. A god may hold a palace, kingdom, sacred current, garden, underworld district or fortress while the surrounding plane retains its own nature, inhabitants and history.

The History of the Planes

The Great Collision and the First Polarity

During the Great Collision, raw potential breaks into active matter, energy, space and time. Positive and Negative energy emerge as the oldest great polarity of creation.

Positive energy drives incarnation, healing, fertility, growth and renewal. Negative energy draws existence toward cessation, dissolution, entropy and release. Both forces predate later moral systems, divine kingdoms and mortal ideas of reward or punishment.

The Astral Reflection

The Astral Plane forms when opposing cosmic forces begin to recognise, compare and define one another without repeating the uncontrolled destruction of the Great Collision. Relationship becomes distance, reflection becomes awareness and sustained thought begins acquiring form.

The Astral Plane becomes the connective intelligence of creation. Separate realities remain distinct while still possessing routes, relationships, magical correspondences and means of communication.

The Elder Gods and Cosmic Law

The earliest concentrations of Astral awareness develop into the Elder Gods. Through immense acts of will, they establish dependable relationships between cause and consequence, matter and form, name and identity, intention and magical effect.

These foundational laws allow creation to persist. Later worlds, planes, magical traditions and living peoples develop within the structures established during these ancient ages.

The Outer Planes and Later Powers

Great principles gathering within the Astral currents eventually become self-sustaining realities. Law, freedom, mercy, labour, instinct, courage, conflict, betrayal, appetite and other enduring pressures acquire landscapes, peoples and natural laws.

These realities become the Outer Planes. Titans and later divine generations enter an existing cosmos, establish sacred territories, fight wars, create peoples, suffer exile and leave permanent marks upon the planes they inhabit.

Explore the complete Cosmic Dawn and world-history chronology.

Directory of the Planes

The Material Plane

The Material Plane is the physical universe of stars, planets, weather, seas, living bodies and mortal history. Earth stands within this reality as a world where planar gates, divine powers, ancient myths and ordinary human choices continually meet.

In the present Age of Severed Crowns, damaged portals, excavated ruins, plague deaths, disputed sacred authority and ambitious magic create new points of contact between Earth and the wider planes.

Coterminous Worlds

• The Fey World — Faerie and the Otherworld
  A neighbouring reality of living nature, transformation, fey courts, inherited wonder, strange hospitality and landscapes responsive to season, story, emotion and oath.
• The Ethereal Plane
  The insubstantial medium surrounding and penetrating many physical places, inhabited by ghosts, hidden structures, ethereal peoples and presences able to act across the boundary of matter.
• The Shadow Plane
  A dark counterpart reached through reflection, absence, weakened substance and places where shadow has accumulated enough depth to become passage.

The Transitive Planes and Great Routes

• Astral Plane — Silver Expanse of Thought and Reflection
  The realm where reflection becomes awareness and awareness begins shaping gods, laws, magic and worlds. Its silver currents connect established realities through intention, identity and relationship.
• The Plane of Dreams — Oneirion
  A mutable reality formed from sleep, memory, fear, desire and repeated dream. Its regions include stable dream-roads, shared symbolic landscapes and dangerous depths where nightmares acquire independent purpose.
• Yggdrasill — The Tree of Life
  A living cosmic axis whose roots, trunk, branches, wells and wounds connect northern divine realms, underworlds, mortal lands and mythic border worlds through ancestry, oath, fate and sacred passage.
• The Infinite Staircase
  A transitive network of landings, impossible stairs and mysterious doors drawn toward places where intelligent beings have expressed powerful creativity, longing and purpose.

The Energy Planes

• The Positive Energy Plane — Life Unbound and Burning Creation
  The source-plane of life-force, healing, fertility, renewal and pre-incarnate possibility. Its unlimited vitality can overwhelm living bodies as completely as any destructive force.
• The Negative Energy Plane — The Void of Entropy and Unlife
  A lightless realm of dissolution, negative energy and cosmic unmaking where existence is drawn toward release, collapse and cessation.

The Elemental Planes

• Elemental Plane of Air — Infinite Sky of Breath, Wind and Storm
  Endless height, living weather, cloud kingdoms and open distance where current replaces road and breath, speech, pressure and movement shape law.
• Elemental Plane of Earth — The Deep Foundation
  Stone before horizon: a world of pressure, minerals, buried memory, immense caverns, shaitan courts, xorn territories and vaults capable of swallowing kingdoms.
• Elemental Plane of Fire — The Eternal Furnace
  A universe of flame seas, cinder plains, brass dominions, azer forges, volcanic wounds and sacred heat where every unprotected thing faces burning transformation.
• Elemental Plane of Water — The Worldsea Without Shore
  An immeasurable ocean with no true surface or sea floor. Current, pressure, depth, memory, hospitality and hunger replace roads and fixed horizons.

The Elemental Planes meet through broad, unstable frontier regions. Smoke, steam, magma, dust, mud, ice, storm, ash and pressure form where elemental influences overlap. These borders vary enormously in size and rarely form neat, equal territories.

Outer Planes of Good, Flourishing and Sacred Rest

• The Celestial Realms
  Ascending realms of ordered compassion, sacred responsibility, protected rest and the disciplined defence of souls and communities.
• Bytopia — The Twin Paradises of Honest Work and Shared Reward
  Two worlds face each other across a shining sky. Their communities flourish through honest craft, fair obligation, earned rest and labour that enriches others.
• Elysium — Blessed Peace and Merciful Rest
  A gentle country where the wounded recover, the righteous dead find joy and mercy becomes strong enough to confront suffering without erasing its history.
• The Beastlands — Wilderness of Living Instinct
  A boundless realm of awakened beasts, sacred migration, natural sovereignty and animal souls that resist captivity, wasteful dominion and inherited ownership.
• Arborea — The Olympian Glades
  A three-layered plane of passionate freedom, chosen community, divine splendour, living seas, artistic achievement and surviving Titan-age memory.
• Ysgard — Asgard, Valhalla and Saga-Law
  The heroic plane where courage becomes weather, oaths shape passage and the honoured dead continue their stories through contest, feast, grief and prophecy.
• Arcadia — The Peaceable Kingdoms of Ordered Harmony
  A realm where peace is cultivated, abundance is shared and boundaries protect life through neighbourly duty, refuge, mediation and care.

Outer Planes of Law, Conflict and Transformation

• The Great Mechanism — Plane of Absolute Law
  The reality where law becomes landscape, judgement becomes motion and contracts, measures, procedures and broken oaths pass through the turning world-engine.
• Limbo — The Ever-Changing Expanse
  A morphic sea of possibility where will can create temporary stability and every fixed landscape remains vulnerable to transformation.
• Pandemonium — The Howling Labyrinth
  An infinite cavern world where winds collide, communication fractures and unrestricted movement destroys direction, trust and dependable escape.
• Acheron — The Infinite Battlefield
  A realm of regimented warfare, iron strongholds, colliding world-blocks and conflict sustained long after its original cause has lost all meaning.

Outer Planes of Tyranny, Ruin and Imprisonment

• Hell — The Infernal Dominion
  A plane of calculated tyranny, spiritual suffocation, temptation and law shaped into an instrument of ownership and control.
• Gehenna — The Fourfold Furnaces
  A hostile realm of immense volcanic slopes, mercenary powers, ruthless ambition and survival purchased through exploitation, treachery and debt.
• Abaddon — The Gray Waste
  A plane of spiritual extinction, predation and hopelessness where daemonic powers seek the consumption and erasure of souls.
• The Abyss — Infinite Demon Plane of Chaos and Ruin
  The plane where appetite becomes country, violence becomes weather and innumerable layers generate demons, corruption and predatory freedom without responsibility.
• Carceri — The Tarterian Depths
  A prison plane of betrayal, exile and confinement whose worlds separate captives through hostile distance, old punishment and broken trust.

Afterlife and Exceptional Realms

• Duat — The Pharaonic Realm of the Dead
  A funerary reality of sacred passage, judgement, guarded gates, solar journeys and the continuing transformation of the dead.
• Leng — The Plateau Beyond Ordinary Dream
  A nightmare-bound plateau of alien trade, ancient ruins, unstable time and contact with powers whose motives resist mortal reason.
• The Unfathomable Beyond
  A reality beyond dependable cosmic law where matter, perception and identity cease obeying familiar relationships and contact brings transformation.

An exceptional realm may contain one chamber, an isolated island, a city, an ocean or generations of inhabitants. Scale alone does not determine the reality of its people, history or consequences.

How Planar Travel Works

Planar travel crosses between realities whose laws do not naturally agree. A successful expedition must reach its destination, survive arrival, establish its location, understand local authority and preserve a route home.

Natural Crossings

Some boundaries grow thin because two places share a powerful relationship. A wildfire can open toward Fire. A sacred spring may descend into Water. A burial mound can touch an underworld. A forest governed by inherited custom may lead into the Fey World.

Season, ritual, weather, bloodline, memory and local law frequently determine when such a crossing opens and whom it permits to pass.

Constructed Gates

Planar civilisations, divine powers, magicians and vanished empires create permanent or repeating gates. A functioning portal may require a key, name, offering, astronomical condition, recognised authority or fulfilment of an old agreement.

Gates often outlive their builders. The mechanism may continue working even after the destination has changed, fallen into ruin or come under new ownership.

Astral, Dream and Mythic Passage

Teleportation, projection and planar movement disturb the Astral currents. Dreams create routes through Oneirion. Yggdrasill connects worlds through living roots and branches. The Infinite Staircase draws doors toward creativity and longing. Divine and funerary roads follow the laws of their makers.

Every route has an identity. A death-road may receive only the dead. A heroic crossing may demand courage. A sacred tree may recognise bloodline and oath. A gate built for conquest may continue treating every traveller as an invading soldier.

Preparing an Expedition

Before crossing, determine:

• the atmosphere, substance and environmental pressures of the destination;
• how gravity, time, distance and direction operate;
• who claims the expected arrival point;
• which inhabitants possess recognised personhood and legal standing;
• what protection the party needs against elemental, magical or spiritual exposure;
• how speech, writing, signals and translation function;
• what local law treats as trespass, theft, sacrilege or unlawful violence;
• how supplies, rest and shelter will be secured;
• how the return route will be guarded or replaced;
• what the party will do when the arrival point has moved, collapsed or been occupied.

Survival magic solves only part of the problem. A traveller may resist fire and still violate an efreeti border, survive Pandemonium’s winds and lose every companion, or breathe Water’s endless sea while becoming indebted to the court controlling the nearest air-bell.

Gods, Souls and Planar Law

Divine Realms

Gods establish realms according to their nature, history and authority. These can include palaces, sacred fields, courts, seas, fortresses, halls, underworld districts and entire kingdoms within a greater plane.

The surrounding plane retains its own identity and older inhabitants. This creates divine borders, disputed jurisdictions, rival claims and territories whose native peoples predate the gods who later establish courts among them.

Souls and Petitioners

The dead travel through several possible routes. Divine relationships, funerary rites, spiritual identity, recognised obligations, culture, oath, judgement and unresolved attachment can all affect where a soul arrives.

The Positive and Negative Energy Planes perform cosmic functions of vitality and dissolution. Outer Planes and dedicated afterlife realms receive many dead as petitioners: souls established within a planar society and shaped by its laws, values, divine powers and environment.

Petitioners can possess memory, community, work, property, duty and meaningful relationships. Their existence continues to create choices and consequences.

Personhood and Consequence

Intelligent outsiders, elementals, fey, petitioners, transformed souls and other planar inhabitants may possess ancestry, law, property, treaties and recognised social status. Physical appearance alone does not settle whether an inhabitant is a person.

Surrender, safe-conduct, hospitality and diplomatic status matter wherever local society recognises them. Mindless hazards, uncontrolled elemental forces and predators incapable of agreement operate outside those customs.

Destroying an inhabited air-bell, poisoning a soul-orchard, severing a living planar route or killing a sacred animal can carry consequences equivalent to siege, murder, sacrilege or the destruction of a settlement.

Running a Planar Campaign

A planar campaign works best when every crossing changes the choices available to the characters. Each plane should create distinct pressure through environment, culture, law, movement, communication and consequence.

Begin with a Mortal Consequence

The first planar problem can begin on Earth: a well that no longer reflects the sky, a plague victim whose soul cannot pass, a storm speaking in an unknown language, a forest returning travellers years late or a gate uncovered beneath a ruined city.

Make Arrival Specific

Bring the party into a customs platform, air-bell harbour, petitioner village, disputed shrine, divine border, Astral settlement, battlefield breach or wilderness claimed by a recognised people.

The arrival point immediately establishes pressure. The travellers need shelter, permission, translation, local knowledge or a way to prevent their portal from becoming a military threat.

Use the Plane’s Identity

On Bytopia, work and obligation matter. In the Beastlands, hunting, migration and captivity matter. In Arborea, passion, memory and chosen bonds matter. In the Great Mechanism, jurisdiction and procedure matter. In Pandemonium, communication, isolation and direction matter.

Give Native Inhabitants Their Own Goals

Planar peoples defend territory, inherit disputes, enforce law, trade, protect sacred places, raise families and disagree about their rulers. The party enters a world whose history and conflicts are already in motion.

Let Failure Travel Home

Failure can mean a lost return route, a debt to a court, an unwanted passenger, a breach opened above a mortal settlement, a delayed return, a violated divine boundary or the discovery that saving one soul displaced another.

Continue to the Planar Campaigns guide for campaign structures, travel methods and adventure planning.

Recommended Starting Guides

• Astral Plane: Begin here for cosmological history, planar connections and thought-shaped travel.
• Yggdrasill: Use this for physical, sacred and oath-sensitive passage between mythic worlds.
• The Plane of Dreams: Use this for symbolic journeys, shared dreams, nightmare incursions and realities shaped by memory.
• Elemental Plane of Water: Use this for exploration, diplomacy and a complete environment without natural land or surface.
• Arborea: Use this for divine politics, Hellenic myth, living seas and Titan-age memory.
• The Beastlands: Use this for wilderness, sacred animals, migration and non-human personhood.
• The Great Mechanism: Use this for contracts, judgement, procedure and cosmic consequence.
• Pandemonium: Use this for survival, difficult communication, hostile exploration and isolated communities.
• The Abyss: Use this for layered demonic campaigns, corruption and destructive appetite.

Related SpiralWorlds Guides

• Gods and Pantheons: Divine powers, sacred relationships, servants, worship and the realms established by the gods.
• World Bestiary: Elementals, outsiders, fey, demons, celestial beings and other creatures encountered beyond Earth.
• Planar Campaigns: Guidance for building expeditions, crossings, adventures and long-running campaigns across the planes.
• Cosmic Dawn: The earliest history of creation, the Great Collision and the emergence of cosmic powers.

Historic and Mythic Context

Human cultures have long described reality as containing more than the visible world. Divine mountains, spirit forests, layered heavens, underworld rivers, dream countries, sacred islands, elemental foundations, world-trees and roads travelled by the dead appear across many traditions.

In SpiralWorlds, these traditions preserve encounters with a real and immense cosmology. Each culture describes the realms it has reached, the powers with which it has negotiated and the journeys its living and dead have undertaken.

Hellenic traditions preserve Olympus, divine seas, blessed afterlives and Titan-age powers. Northern traditions preserve Asgard, Bifrost, Yggdrasill and the interconnected Norse worlds, including routes between heroic, elemental, fey and underworld realms. Pharaonic traditions preserve the Duat and the nightly solar passage through the netherworld, alongside funerary transformation and divine judgement. Other cultures possess equally real crossings understood through their own histories, languages and sacred customs.

Traditions can overlap while describing different regions, routes or authorities. Two peoples may encounter separate territories within one plane, use different names for related powers or understand a divine kingdom as the whole reality surrounding it.

Every cosmological map therefore records knowledge, loyalty and limitation. The planes remain greater than the systems used to describe them, and every successful expedition reveals how much of creation still lies beyond the known paths.

Continue into Planar Campaigns

The Planes hub introduces the structure of the cosmology and the realities available for exploration. The Planar Campaigns guide develops that material into practical play, including campaign structures, methods of planar travel, expedition preparation, arrival pressure, native societies, failure states and consequences that follow characters home.

Explore the complete Planar Campaigns guide.