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SpiralWorlds Cosmology · Transitive Plane
Ethereal Plane — The Ghostly Border Between Worlds
The Ethereal Plane is reality standing beside itself: a silver-grey realm of overlap, hidden passage and ghostly nearness where travellers move beyond inert physical barriers while remaining close to the world they left.
Physical reality remains nearby, visible through the mist but separated by planar substance.
Ghostly nearness
The world remains close, but no longer solid
In the Border Ethereal, a traveller occupies a corresponding position beside a neighbouring reality. Buildings, roads, rivers, living creatures and moving armies remain visible through pale mist, while most inert physical substance no longer prevents passage.
Locked doors, stone walls and buried chambers can be crossed without opening them. Material observers usually remain unaware of the traveller. This freedom is accompanied by isolation: ordinary hands cannot lift a Material latch, seize a weapon or drag an endangered companion across the boundary.
Beyond the overlapping border lies the Deep Ethereal. Familiar geography fades into an open expanse of mist crossed by currents, colour curtains, wandering predators, lost refuges and the boundaries of demiplanes. Navigation there depends upon knowledge, anchors and recognised routes rather than terrestrial direction.
Core principle
Ethereal travel follows proximity. A traveller first moves beside a place and only later abandons that correspondence for the deeper mist.
Cosmological role
The medium of adjacent realities
The Ethereal Plane allows two realities to occupy corresponding positions without becoming one substance. It preserves the boundary between them while allowing observation, passage and exceptional forms of interaction.
Its two great conditions perform different work. The Border Ethereal clings to a neighbouring reality and preserves local position. The Deep Ethereal releases that local correspondence and opens into currents leading towards other borders and enclosed demiplanes.
| Realm or Route | Governing Principle | Common Use | Primary Failure |
|---|---|---|---|
| Astral Plane | Intention, identity and relationship | Connection between separated realities | Thoughtstorms, damaged laws and identity distortion |
| Ethereal Plane | Coexistence and proximity | Hidden observation and passage through physical barriers | Isolation, predation and unsafe return |
| Shadow Plane | Distorted reflection and compressed distance | Rapid movement between Material locations | Imprecise navigation and uncertain arrival |
| Oneirion | Dream, memory, fear and symbolic truth | Dream passage, prophecy and memory journeys | False awakening and loss of the waking anchor |
Spirits and the roads beyond death
Ghosts may remain in the Border Ethereal beside a person, object, body or place that anchors them. Other spirits cross its mist while seeking judgement, reincarnation, ancestral country or a divine realm. A haunting therefore marks delay, attachment, pursuit or unfinished obligation.
The near mist
The Border Ethereal
The Border Ethereal overlaps a neighbouring reality. Each position within the border corresponds to a nearby physical position, allowing travellers to navigate by observing the muted landscape around them.
01 · Correspondence
Place remains recognisable
Rooms, roads, hills and rivers retain their relative positions. Movement through the border normally covers the same distance as movement beside the adjoining world.
02 · Insubstantial passage
Inert matter loses authority
Ordinary walls, doors, floors and earth cannot stop a fully Ethereal traveller. Living beings, magical force, dimensional seals and specialised planar wards can remain obstacles.
03 · Muted perception
The nearby world appears veiled
Colour weakens, edges soften and distant detail disappears into mist. Exact sensory limits depend upon the magic, creature ability or game system governing the crossing.
04 · Concealment
Ordinary senses look past the traveller
Material creatures usually cannot perceive an Ethereal presence. Truesight, planar senses, divination and creatures able to shift between planes can expose it.
05 · Ethereal pressure
Powerful places mark the border
Tombs, plague pits, portals, sacred thresholds, mass graves and repeated hauntings impress patterns upon the surrounding mist.
06 · Return
Position matters at manifestation
A traveller returning within solid matter is forced towards open space. Violent crossings, active wards and collapsing portals can scatter or injure a group.
Border discipline
Before returning, identify open space, examine the local wards and confirm that the corresponding structure has not changed since entry.
Beyond correspondence
The Deep Ethereal
The Deep Ethereal begins where the influence of a particular border fades. Physical landmarks become immense pale silhouettes and then disappear. The traveller enters open mist without a dependable horizon, compass or universal ground.
Routes persist as currents, repeated crossings and relationships between boundaries. Some remain stable for centuries. Others move after an ether cyclone, the collapse of a demiplane, a magical war or the death of the power that maintained them.
The Near Veil
The fading edge of a border
The adjoining world remains barely visible. Expeditions establish return marks here before committing themselves to deeper travel.
Mist Confluences
Junctions of several currents
Confluences become meeting places, hunting grounds, trading stations and strategic points controlled by guides or planar powers.
Colour Curtains
Boundaries visible as radiance
Curtains appear as rippling light, storms, rain, smoke or walls of impossible colour. Passing through one reaches another Ethereal border.
Demiplane Shores
The edges of enclosed realities
A demiplane may present a doorway, forest edge, island, tower, weather front or distant city reflected upon the mist.
Ghost Roads
Paths worn by repeated passage
Spirits moving towards a shared destination can create temporary roads marked by footsteps, voices, funeral objects and remembered light.
Ether Cyclones
Storms of violent displacement
Cyclones twist established currents, extend journeys, reveal hidden shores and cast travellers towards unintended borders.
Ethereal Refuges
Strongholds beside stable routes
Explorers build observatories, monasteries, prisons, markets and waystations around reliable boundaries or enduring fragments of solid substance.
Grave Mists
Weather formed by unresolved death
Large concentrations of displaced spirits can spread into the deep mist as cold regions filled with memories, repeated journeys and unfinished voices.
Life and unlife in the mist
Inhabitants and travellers
The plane appears empty to visitors who spend all their attention watching the adjoining world. Ethereal predators, spirits and experienced travellers can see the expedition directly.
Bound Spirits
Ghosts and unfinished dead
Ghosts commonly remain beside the people, bodies, possessions or places anchoring them. Their ability to manifest or communicate varies with the nature of the haunting.
Phase Predators
Spiders and border hunters
Phase-shifting creatures wait beside prey, attack through a sudden crossing and withdraw before Material defenders can retaliate.
Raiders
Xill and other abductors
Raiders observe settlements from the border, select isolated victims and withdraw through routes prepared before the attack.
Spirit Hunters
Night hags and soul traders
Some hunters follow nightmares, dying souls and roads used by the dead. They approach sleeping victims without entering the guarded Material room.
Planar Thieves
Ethereal Filchers
Ethereal filchers are Material Plane aberrations able to shift rapidly across the boundary. They use the Border Ethereal to approach valuable objects, escape pursuit and return to hidden underground lairs.
Planar Peoples
Guides, settlers and route-keepers
Stable routes support scouts, traders, scholars, exiles and communities maintaining refuges beyond the control of Material rulers.
Give every Ethereal encounter a motive
A creature may defend a route, recover a stolen anchor, follow the wake of a crossing, guard a ghost road or prevent travellers from opening a dangerous demiplane shore.
The playable present
The Ethereal Plane in 1454
During the Age of Severed Crowns , knowledge of the Ethereal Plane is fragmented among court magicians, temple guardians, grave custodians, occult fraternities, spies, monster hunters and hereditary families responsible for particular crossings.
The Black Death has left many places where the Border Ethereal is crowded with unresolved movement. Rare Red Death outbreaks create more violent disturbances: corpses rise on the Material side while frightened or divided spirits gather beside plague houses, burial grounds and abandoned roads.
War also alters the border. Sieges, massacres, destroyed dynasties and the seizure of sacred buildings leave overlapping claims that survive as Ethereal boundaries. A conquered fortress may contain the living garrison, the ghosts of its former defenders and a planar ward that still recognises a dead ruler.
Court espionage
Rulers employ rare Ethereal scouts to inspect sealed rooms, watch negotiations and identify concealed passages.
Grave custody
Communities protect burial grounds against necromancers, spirit hunters and crossings opened by mass death.
Planar smuggling
Contraband, relics and fugitives pass through borders that city walls, toll gates and blockades cannot control.
Monster hunting
Phase predators and abductors force investigators to pursue enemies through spaces invisible to ordinary witnesses.
Lost roads
Older portals still lead towards refuges, archives and demiplanes established by vanished kingdoms.
Contested thresholds
Temple gates, royal tombs and ancestral halls may recognise claims that present Material authorities have rejected.
Crossing the boundary
Entering, navigating and returning
01 · Entry
Open a controlled crossing
Spells, innate phase movement, portals, haunted thresholds, cursed objects and planar instruments can open the way.
02 · Record
Mark the point of arrival
Record local landmarks, the crossing’s appearance, active wards and the open spaces available for return.
03 · Anchor
Carry a connection to the route
A tuned rod, route seal, destination object, ghost token or planar chart can prevent drift in the Deep Ethereal.
04 · Watch
Guard the Ethereal side
An observer focused only upon the Material world may overlook the creature already following through the mist.
05 · Navigate
Follow verified currents
Deep travel depends upon recognised confluences, colour curtains, stable guides and destinations strong enough to leave a signature.
06 · Return
Manifest in open space
Confirm the corresponding location, examine the local wards and return the expedition together whenever possible.
Common hazards
| Hazard | Warning | Consequence | Response |
|---|---|---|---|
| Unsafe return | The corresponding space is occupied or warded | Displacement, injury or separation | Prepare several open return points |
| Border predator | Mist parts without wind or Material animals react to empty space | Ambush from an unseen attacker | Assign an Ethereal watch |
| Ether cyclone | Currents rotate and distant lights stretch | Delay, route loss or forced arrival | Secure the group and protect the route anchor |
| False curtain | The boundary changes when viewed indirectly | Arrival within a trap or hostile shore | Test the curtain before crossing |
| Ghost attachment | A spirit repeats the group’s path or imitates one traveller | Possession or a haunting carried home | Identify the spirit and its anchor |
| Current drift | Known landmarks appear in the wrong order | Extended travel or unintended destination | Return to the last verified confluence |
System mechanics
Ethereal Plane rules
The descriptive entry remains system-neutral. Use the tab matching the campaign, then apply any more specific spell, creature ability or planar effect governing the crossing.
D&D 2024 / 5.5E plane profile
- Plane Type: Transitive Plane.
- Border Visibility: Usually limited to 60 feet within the Border Ethereal.
- Deep Visibility: Usually limited to 30 feet within the Deep Ethereal.
- Overlapping View: A traveller in the Border Ethereal can normally see 30 feet into the adjoining plane.
- Common Access: Etherealness, Plane Shift, Gate and magical portals.
- Deep Travel: A journey between two Ethereal curtains takes 1d10 × 10 hours.
Planes bordering the Ethereal
The Border Ethereal overlaps the Material Plane, the Feywild, the Shadowfell and the Inner Planes. Each location upon those planes has a corresponding location within the Border Ethereal.
The Outer Planes do not possess corresponding Ethereal borders. Travel to an Outer Plane normally uses the Astral Plane, a portal, a gate or another direct planar effect.
Border Ethereal visibility
Visibility within the Border Ethereal is usually limited to 60 feet. The overlapping plane appears greyish and indistinct, with blurred colours and softened edges.
A traveller can normally see only 30 feet into the overlapping plane. The Ethereal Plane remains imperceptible to creatures upon that plane unless magic, truesight or another feature reveals it.
Interaction across the boundary
Creatures in the Border Ethereal cannot normally attack creatures upon the overlapping plane, and creatures upon that plane cannot normally attack Ethereal creatures.
An Ethereal traveller is ordinarily imperceptible and silent to someone upon the overlapping plane. Specific spells, magical effects and creature traits can create exceptions.
Movement through the border
Solid objects upon the overlapping plane do not normally hamper an Ethereal creature. A traveller can move through walls, doors, floors, ceilings, earth and unattended objects.
Living beings and certain magical effects remain obstacles. Anything formed from magical force can block Ethereal movement when the effect extends into the plane.
Entering the Border Ethereal
The Etherealness spell places its targets within the Border Ethereal corresponding to their current plane. The spell governs the targets’ movement, duration, perception and return.
Plane Shift can transport travellers to either the Border Ethereal or the Deep Ethereal. Unless the destination is a known location or established teleportation circle, arrival can occur anywhere within the chosen region.
The Deep Ethereal
The Deep Ethereal is a region of roiling mist beyond the borders overlapping other planes. Visibility there is usually limited to 30 feet.
Reaching it normally requires Plane Shift, Gate or a magical portal. The Etherealness spell alone places travellers within the Border Ethereal.
Ethereal curtains
Curtains of coloured vapour are scattered throughout the Deep Ethereal. Passing through one carries a traveller into the Border Ethereal connected to a particular plane.
| d12 | Destination Border | Curtain Colour |
|---|---|---|
| 1–2 | Material Plane | Turquoise |
| 3 | Shadowfell | Dusky grey |
| 4 | Feywild | Opalescent |
| 5 | Elemental Plane of Air | Pale blue |
| 6 | Elemental Plane of Earth | Chestnut |
| 7 | Elemental Plane of Fire | Orange |
| 8 | Elemental Plane of Water | Green |
| 9 | Para-elemental Plane of Ash | Dark grey |
| 10 | Para-elemental Plane of Ice | Aquamarine |
| 11 | Para-elemental Plane of Magma | Maroon |
| 12 | Para-elemental Plane of Ooze | Chocolate brown |
A curtain’s texture and temperature also reflect the nature of the plane concealed beyond it.
Deep Ethereal travel
Physical distance has little practical meaning in the Deep Ethereal. Travellers feel themselves moving by will but cannot reliably measure their speed or determine the distance crossed.
A journey from one Ethereal curtain to another takes 1d10 × 10 hours, regardless of the planes connected by the curtains.
During combat and other round-by-round situations, creatures use their normal movement speeds.
Ether cyclone warning
An ether cyclone is a serpentine column that tears through the Deep Ethereal, distorting and uprooting Ethereal forms in its path.
A traveller with a Passive Perception of 15 or higher receives 1d4 rounds of warning as a deep vibration or hum spreads through the surrounding mist.
Travellers unable to reach a curtain, portal or other refuge before the cyclone arrives roll once on the Ether Cyclone table.
Ether cyclone
| d20 | Effect |
|---|---|
| 1–12 | Extended journey. Each traveller makes a DC 15 Charisma saving throw. If at least half the group succeeds, the journey is delayed by 1d10 hours. Otherwise, the remaining travel time is doubled. |
| 13–19 | Random border. The cyclone carries the group into the Border Ethereal associated with a randomly determined plane. Roll on the Ethereal Curtains table. |
| 20 | Astral displacement. The cyclone tears open a planar breach and hurls the travellers to a random destination upon the Astral Plane. |
Using the plane in play
- Use the Border Ethereal for scouting, infiltration, bypassing inert physical barriers and observing nearby locations.
- Use the Deep Ethereal for travel between the Material Plane, its echoes and the Inner or Para-elemental Planes.
- Treat living beings, magical force, Ethereal inhabitants and uncertain return routes as the principal obstacles.
- Keep the 60-foot Border visibility, 30-foot Deep visibility and 30-foot overlapping view active so that Ethereal scouting never becomes perfect reconnaissance.
This tab summarises the Ethereal Plane mechanics presented in the 2024 Dungeon Master’s Guide. Individual spells, monsters and magical effects can impose additional or different restrictions.
Established planar traits
| Trait | Rule |
|---|---|
| Gravity | No gravity |
| Morphic Quality | Alterable morphic, although the plane contains little ordinary substance to alter |
| Alignment | Mildly neutral-aligned |
| Magic | Normal magic, subject to the restrictions governing effects crossing the Material–Ethereal boundary |
Cross-boundary interaction
Creatures on the Ethereal and Material Planes cannot normally attack one another. An Ethereal traveller is invisible, insubstantial and silent to a Material observer.
Force and abjuration effects
Force effects and abjurations capable of affecting Ethereal creatures can cross from the Material Plane when the caster can detect and target the Ethereal creature.
Magical attacks do not normally cross from the Ethereal Plane into the Material Plane, including Force attacks.
Movement and manifestation
Ethereal creatures move through Material creatures and objects without physical obstruction. Ethereal barriers, Force effects and dimensional wards remain effective when their rules state that they do.
Use the relevant spell, supernatural ability or planar travel effect to resolve duration, rematerialisation and damage caused by returning within solid matter.
This tab preserves the Pathfinder 1E and D&D 3.5 planar-trait model used by the legacy entry.
SpiralWorlds optional procedures
The following rules supplement the published D&D and Pathfinder mechanics rather than replacing them.
Finding a Deep Ethereal route
A character already in the Border Ethereal can search for a thinning point leading into a known Deep Ethereal route. The attempt requires a planar guide, attuned instrument, established crossing or successful planar navigation check.
This procedure does not allow ordinary Border Ethereal travel to reach the Deep Ethereal automatically. The Games Master determines whether a usable thinning point exists.
Deep Ethereal navigation
When a route is uncertain, use Intelligence (Arcana), Wisdom (Survival), Knowledge (planes) or the nearest equivalent.
| Difficulty | Route |
|---|---|
| Routine | A recently travelled current with a reliable guide or functioning anchor |
| Moderate | A known shore, concealed curtain or partially disrupted route |
| Hard | A moving destination, cyclone region or border protected against discovery |
| Extreme | A lost prison, erased route or demiplane whose creator no longer exists |
Consequences of failure
- The journey takes substantially longer than expected.
- The group leaves a wake that can be followed.
- A creature or important object becomes separated.
- The expedition reaches a related but unintended border.
- A local inhabitant intercepts the travellers.
- The route anchor is damaged and cannot guide the return journey.
Tracking a crossing
A recent passage disturbs the mist. A successful planar knowledge, perception or tracking check can reveal its direction, approximate numbers and whether the crossing was calm, hurried or violent.
Safe rest
A secure rest in open mist requires a concealed wake, defended refuge or control of the nearby current. The absence of Material observers does not protect the expedition from Ethereal inhabitants.
Campaign use
Running Ethereal adventures
The plane works best when passing through a wall solves the first obstacle and reveals a second. The travellers may enter the sealed chamber, but they still face the guardian living within the border, the conversation they cannot fully interpret and the ward surrounding their return point.
Infiltration
The sealed chamber
The party bypasses the doors and discovers an Ethereal guardian occupying the room.
Investigation
The silent witness
A ghost saw a murder but can communicate only through movements repeated in the physical room.
Rescue
The failed return
One member of an expedition remains in the mist after the spell bringing the others home ends.
Pursuit
The phase hunter
A predator attacks isolated victims and retreats to a nest hidden within apparently solid ground.
Exploration
The moving shore
A demiplane containing a lost archive appears at a different confluence after every cyclone.
Warfare
The unseen siege
Material defenders hold the walls while Ethereal raiders fight for the wards and manifestation points.
Quick answers
Ethereal Plane questions
What is the Border Ethereal?
It is the part of the Ethereal Plane overlapping a neighbouring reality. A traveller retains a corresponding position beside that world while moving beyond most inert physical barriers.
What is the Deep Ethereal?
It is the open mist beyond local correspondence, containing currents, colour curtains, refuges and the boundaries of demiplanes.
Can Ethereal creatures attack Material creatures?
Ordinary attacks do not cross the boundary. Specific spells, abilities, wards and creature traits may create exceptions.
What blocks an Ethereal traveller?
Most inert physical matter does not obstruct Ethereal movement. Living beings, magical force, dimensional wards and effects that extend into the Ethereal Plane can remain solid or dangerous.
Why do ghosts appear in the Ethereal Plane?
A ghost may remain beside the person, body, possession or place anchoring it. Other spirits use roads through the mist towards ancestral, divine or judicial destinations.
Historical and cultural context
Aether, spirit communication and unseen presence
The name draws upon older ideas of aether as celestial or subtle substance. Ancient, medieval and later esoteric traditions developed different accounts of spirit, breath, invisible matter and worlds beyond ordinary perception.
Nineteenth-century mesmerism and spiritualism popularised séances, table turning, trance mediumship, spirit writing and attempts to investigate communication with the dead. Stage phantasmagoria and magic-lantern projection also gave audiences vivid images of apparitions occupying ordinary rooms.
Fantasy role-playing transformed these separate influences into a navigable cosmological environment used for ghostly movement, hidden observation, passage through barriers and access to demiplanes. SpiralWorlds preserves that practical structure while giving the Astral, Ethereal, Shadow and Dream planes distinct governing principles.
Selected video guides
External introductions to the Ethereal Plane
These videos provide additional Dungeons & Dragons lore and campaign inspiration. They do not define SpiralWorlds canon.
Continue exploring
Related SpiralWorlds entries
The border is part of the encounter
Hidden passage should reveal hidden danger.
Let the travellers cross the wall. Then show them the creature waiting inside it, the ward around the return point and the wake their passage has left through the mist.