Introduction to the Planes

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The Multiverse

If anything can be said about the planes for sure, it’s that they are many and varied. The peaceful fields of Elysium, the mechanical metropolises of Mechanus, the infinite torments of the Abyss, and everything else in between can be found somewhere in the multiverse. Worlds made entirely of water touch those where everyone lives in cities in the sky, bound together by portals reaching across all creation. Billions of people, both the living and the dead, as well as creatures beyond such states, all exist throughout infinite landscapes each different than the last. Some are unaware of the multiverse beyond their own dimension, but others travel the cosmos and make up the greater society of the planes. Anything you can imagine can be found out there by those brave enough to look.

The setting of Planescape is not a single continent or world, but rather an entire multiverse, a collection of planes linked together by portals, mystical pathways, and stranger channels. Most players are familiar with the Prime Material Plane, which serves as the backdrop for the majority of Dungeons & Dragons campaigns and hosts a variety of worlds all its own, while the other planes are commonly reserved for the mightiest adventurers and the most powerful foes. Here we dispense with that myth and make each plane a setting all its own, suitable for characters of any level, and all the richer for its interaction with the rest of the multiverse. There is no single world or plane that sits at the center of creation, for no place in the multiverse overshadows the rest in importance. Players are expected to travel to new planes and encounter new people and ideas often, for that is the life of a planewalker and one most characters would not pass up.

Planar Denizens

Walk into the right bar in a major planar city and it’s not unusual to see a angel from Mount Celestia sitting across a devil from Baator discussing philosophy, politics, and the grand scheme of the multiverse. Mythical creatures are both more common and more active on the planes. Despite the grandeur of such beings, with literally hundreds of thousands of species inhabiting the multiverse there is always something stranger, more powerful, or more influential. Some live as “normal” members of their respective societies while others remain hidden in the far reaches of creation. Indeed, the gods themselves have their own realms, and it’s not unheard of for a deity to speak with visitors or take direct action to further their own ends.

That being said, races that are prevalent on different worlds in the Prime Material Plane are populous on other planes as well, with humans in particular found in high numbers just about anywhere. Beyond that, there is little that can be said to describe such a wide range of creatures and cultures, what with every walk of life existing out there somewhere. Planar societies have a way of reflecting the common aspects of Prime civilizations while being more alien and diverse. At the same time, people tend to hold stronger convictions yet remain somewhat open-minded; the planes have a way of testing one’s beliefs, but with so many different faiths and principles brought into contact on a regular basis planars usually develop a degree of tolerance, if only to avoid getting themselves into unnecessary trouble.

Defining Reality

On the planes, the majority of organizations and powers value one substance above all others: belief. It is a source of power in the multiverse, the sustenance of the gods, the force that makes and moves creation. Much more than abstract thought, reality itself conforms to strong belief. Virtually everything, from whether a particular harvest will be good and what awaits a person’s soul in the afterlife, to the layout of the multiverse and which gods are prominent at any given time, is heavily influenced by the collective will of everyone in the cosmos. In the end, the power of belief can change the planes in profound ways and literally make anything possible.

At first glance, subjective reality may seem like a playground where everyone gets what they want, but most of the time the planes only react to strong convictions and ideas shared by the masses. Beliefs regarding lifestyle choices, which deities deserve worship, and issues of moral and ethical debate are most strongly reflected in the multiverse, for such things truly matter to people. Likewise, the greatest conflicts are between those seeking to prove the superiority of their philosophy or to win the hearts and minds of others, either in hopes of making reality a better (or worse) place or to gain the power inherent in guiding the belief of billions. In the end, the war to define reality provides fertile ground for adventures filled with passion and intrigue, great leaders and conniving gods, and battles that challenge principles as well as capabilities.

Distinctions of Good and Evil, Law and Chaos

Traditional D&D games pit heroic adventurers against vile villains. Advanced stories may complicate matters by placing characters in difficult positions where they must make decisions about what is truly right and wrong. Planescape takes this idea a step further and emphasizes the cultural and philosophical differences that can turn benevolent societies against one another and lead patrons of virtue to become allies with paragons of evil. Just think of the conflicts that can arise from the two ideologies “individual rights supersede the desires of the majority” and “the needs of the many outweigh the needs of the few” and you can begin to see the tensions which divide the multiverse. Even those of good alignment cannot plainly justify their viewpoints based on any sort of majority, for there are just as many realms of evil as realms of good, and some say more than enough fiends to overrun all creation.

To planars, questions of right and wrong instead become questions of what ideology is the best, and with the most extreme manifestations of Good, Evil, Law, and Chaos as influential as they are in the motions of the cosmos, both zealousness and tolerance can often be found in abundance within a single person or group. All of the Outer Planes can be seen as a spectrum of gradual change in outlook, with distinctions in alignment, religion, and culture between neighbors near and far provoking both a confluence of ideas and struggles for supremacy. What this means for planewalkers is that adventure and peril can be found even in the most serene realms, and it is considered no more righteous to go around killing those of opposing morality for what they believe than it is to hunt those of a particular race (even “monstrous” ones) for the characteristics they were born with. That said, there’s no shortage of wars and lesser conflicts over just these differences.

Adventure and Intrigue on the Planes

Planescape is not about high-powered dungeon crawling on the planes, so Dungeon Masters and players should dispel themselves of that notion quickly. If that were the case, traveling the multiverse would hardly do more than provide tougher opponents and larger playing fields, absent of anything truly memorable or inspiring. There are realms which reflect one’s greatest dreams and darkest nightmares, grounds for characters to test their limits and explore not just infinity, but themselves. To this end Planescape endeavors to leave behind hack and slash adventuring for in depth role-playing by emphasizing philosophical thinking and social interaction. Players are encouraged to consider resolving conflicts with words and cunning before resorting to the tip of a sword (though there’s plenty of that as well), just as Dungeon Masters are encouraged to create thought provoking and conviction testing stories that provide opportunities for character development as much as they provide players with new experiences.

Welcome to the Great Ring

Every culture has some theory as to the shape of the multiverse, whether it’s as simple as Heaven above and Hell below, or a complex cycle involving the movement of celestial bodies. The traditional cosmology of D&D campaign settings is some variation of the Great Wheel. This model centers on the Prime Material Plane, which may seem appropriate to residents of that dimension, but is often considered naive arrogance by others. Most planar creatures believe the multiverse is circular, without beginning or end, a cosmology called the Great Ring. This model follows three important truths that remain universal throughout most of creation:

The Center of the Multiverse: Contrary to supremacist thinking everywhere, there is no center of the multiverse, or rather, with the planes being infinite in size wherever one stands could be called the center. There are certainly a great number of folk who consider Sigil to be the hub of all planar society, just as most Primes believe all existence revolves around their plane. In the grand scheme of things, however, no particular spot is more important than any other. No matter how influential a place may be, it’ll never be the source of the gods and all the planes, and things would continue on with or without it.

The Unity of Rings: Everything comes in rings, both figuratively and literally. Sigil is a ring, just as the Outlands are comprised of consecutive rings. Both the Inner and Outer Planes form rings, as do some of the greatest pathways of the multiverse. This pattern represents a greater order: things have no true start or end, but continuously lead to one another and back to whence they came. Even the nature of the gods and the greatest forces in creation are said to move in circles, encompassing all that exists within their domain but never truly going anywhere. The cynical might cite the Unity of Rings as proof that things never truly change, but the truth of it is the course of history is a culmination of even the smallest details, and the consequences of one’s actions will eventually come back to them.

The Rule of Three: Things come in three. No one really knows why, but examples are found in the most fundamental aspects of the multiverse: Good, Evil, and Neutrality; Law, Chaos, and Neutrality; Inner Planes, Prime Material Plane, and Outer Planes; Prime, planar, and petitioner. The number three seems to have some power to it, and things both good and bad tend to happen in sets of three on the planes. Planars who see two things know a third probably lies hidden beneath the surface, and more than one treatise has been written on the matter. Of course, that may just be the power of belief making what people already believe real, but the very shape of the Great Ring seems to prove there’s something to the Rule of Three.

Aside from a couple small differences, Planescape uses the same planes as the Great Wheel, and it can easily integrate those from other cosmologies. The truth of the matter is that although the Great Ring has remained relatively constant for thousands of years, the multiverse is changing, whether because of shifting beliefs or divine decree, and even experienced planewalkers are discovering planes they never knew existed. An in-depth look at each plane from a planar perspective is provided in Chapter 8, but a description of the three components of the multiverse is provided below.

Cardinal Planes

The cardinal planes are the three major groupings of planes. Like jewels on a ring, they are the most prominent portions of the multiverse. No one can say for certain the exact purpose of each group; some think they represent different stages of existence, while others say they simply exist to serve as appropriate homes for vastly different creatures. Of course, some just throw their hands in the air and say there isn’t any meaning behind it, but it cannot be denied that the Inner, Material, and Outer Planes are each very different places.

Inner Planes

The building blocks for the multiverse, the Inner Planes are composed of the elemental and energy planes from which material existence is formed. Here abstract thought is given little credence in face of the natural laws that govern the planes, and many inhabitants pursue wisdom in the characteristics of the most fundamental forces. Each plane consists of its element and little else; the Plane of Water is almost entirely water and inhabited by creatures that enjoy such an environment, while the Plane of Earth is formed of rocks and dirt separated only by sparse caverns and treacherous tunnels. Between each of the Elemental Planes are the Paraelemental Planes, border regions where two elements merge. Likewise, the Quasielemental Planes are the union of the Elemental and Energy Planes.

Collectively, the Inner Planes are exceedingly dangerous to anyone who is not properly prepared to survive the harsh environments beforehand. Naturally, they don’t seem to have nearly the population of the Prime Material or Outer Planes, though each plane has its fill of elementals and elemental creatures. A few planar societies do exist, either because some folk grew fond of the purity found there or because they wanted to exploit the seemingly infinite supply of natural resources. While the Inner Planes are mostly apathetic to ethics and morality as a whole, they feature their own conflicts and wars between opposing elemental forces as well as between variations in alignment on the same plane.

Elemental Planes: Air, Earth, Fire, Water.

Energy Planes: Negative, Positive.

Paraelemental Planes: Ice, Magma, Ooze, Smoke.

Quasielemental Planes: Ash, Dust, Lightning, Minerals, Radiance, Salt, Steam, Vacuum.

The Prime Material Plane

Though a single plane, unbeknownst to most Primes the Prime Material Plane hosts myriad worlds locked away from one another in crystal spheres and suspended in an amber stream known as the phlogiston. A crystal sphere may contain anything from a single isolated world to a field of planets, moons, stars, and other astronomical features. These worlds often differ widely based on varying levels of magic, technology, and culture. Some have unique religions native to its people, while a couple pantheons are worshipped on numerous planets. It isn’t rare for the residents of a world to be unable to access the planes or to not believe in their existence altogether, while others often think their planet exists at the center of all creation. For these reasons and more planars tend to avoid the Prime Material, and quite a few primes are hostile to anything from beyond their own world.

Example Prime Worlds: Athas (DARK SUN), Eberron, Kyrnn (DRAGONLANCE), Oerth (GREYHAWK), Toril (FORGOTTEN REALMS).

The Outer Planes

Home to fiends and celestials, mortals and deities, the Outer Planes are the center of planar activity in the Great Ring. Shaped by the thoughts and faiths of creatures throughout the multiverse, everything here has a bit of subjectivity and hidden meaning to it. Planars of every variety frequently travel countless miles through portals connecting the Outer Planes and the rest of the cosmos, leading to the formation of huge metropolises that act as melting pots for hundreds of races and cultures. Perhaps the most numerous are the petitioners – the souls of the dead who make their resting place on the plane most suited to their nature, whether its to live their afterlife serenely or in perpetual torment.

The Outer Planes are divided along ethical and moral lines: law and chaos, good and evil. Linked together in a wheel with the neutral Outlands as the hub, each plane is positioned based on its alignment relative to its neighbors. The inhabitants, deities, and features of a plane are closely tied to its overall ideology. Likewise, the planes move and conform to the beliefs of their residents. Though existing in an uneasy balance, each of the Outer Planes seeks to grow and have the philosophical outlook it represents spread to the rest of the multiverse.

Planes of Law: Acheron, Arcadia, Baator, Mechanus, Mount Celestia.

Planes of Conflict: The Beastlands, Bytopia, Carceri, Elysium, Gehenna, the Grey Waste, the Outlands.

Planes of Chaos: The Abyss, Arborea, Limbo, Pandemonium, Ysgard.

Upper Planes: Arborea, the Beastlands, Bytopia, Elysium, Mount Celestia.

Neutral Planes: Acheron, Arcadia, Limbo, Mechanus, the Outlands, Pandemonium, Ysgard.

Lower Planes: The Abyss, Baator, Carceri, Gehenna, The Grey Waste.

Intermediate Planes

Between each of the cardinal planes lies an intermediate plane, a transitional realm between two different forms of existence. The intermediate planes connect two of the cardinal groups together, forming a pathway for travelers, magic, and other more forces to move from one to the other. Because of this they are sometimes referred to as transitive planes, but confusion often arises over what is and what isn’t a transitive plane. There are three and only three intermediate planes: the Astral Plane, the Etherial Plane, and the Ordial Plane. They’re all coexistent to their respective cardinal planes, none of them touches another intermediate plane, and they all have their fair share of mystery to them.

The Astral Plane: A silvery expanse of thoughts and ideas where time and space are just concepts. It is a graveyard of dead gods and the passageway for dead souls traveling to their final resting place. It connects the Outer Planes and the Prime Material Plane.

The Ethereal Plane: A mist-filled sea where raw materials give shape to possibilities both real and left unfulfilled. The Border Ethereal touches every Prime world, while the Deep Ethereal is home to countless demiplanes and stranger things lost in its murky depths. The Ethereal connects the Prime Material Plane and the Inner Planes.

The Ordial Plane: The ultimate enigma, a land known only through theory and powerful divination. Perhaps the true home of the gods, or powers greater than they. Maybe the next stage of evolution, or where material and spiritual matter is finally broken apart and purified. It connects the Inner Planes to the Outer Planes.

The Pseudo Planes

The pseudo planes fill a unique niche in the Great Ring, as they are coexistent with virtually every other plane. In fact, pseudo planes are not truly separate planes at all; they have no existence of their own. Rather, they are additional dimensions of the Great Ring, much like how height and width are different dimensions that are fairly universal. Aspects of the multiverse rarely seen, each fulfills a special purpose and each operate very different rules than the rest of the cosmos. The pseudo planes overlap one another just as they overlap most other planes of the Great Ring, making them extremely convenient routes to use when planewalking from different parts of the multiverse. Most planars steer clear from them, however. In the past the pseudo planes were thought to be much smaller than they are known to be now, and it’s only recently that planars have begun to realize their true scope. Its clear that there’s a lot that is unknown about the them, and no one can be quite sure what they’re getting into when traveling through them.

Dream: The Region of Dreams is a place you can get to when you’re not thinking about it, but will have the hardest time reaching when you actually try. It exists wherever resting minds are found, and it is a realm where anything is truly possible, making it both grand and dangerous. Few natural pathways connect to the dreamscapes there.

The Shadowlie: A place of many names, the Plane of Shadow is a realm of dark secrets and terrible prophecies, where the things we try our hardest to deny are locked away. It exists as a mock mirror of each plane it touches, highlighting that which seems contradictory and wrong about them. The Shadowlie is said to hide what we choose to not believe in, even gods and entire planes of existence, and its true nature may be similarly forever hidden.

Temporal Prime: A plane where most people will only ever move in one direction, the Temporal Energy Plane is beyond the understanding of most folk. Supposedly powerful mortals known as chronomancers could use it to travel to points both near and far in history, but it’d be a foolish act to trust anyone who claimed to be one.


One burg deserves special attention, for it’s unlike any other place in existence. Atop an infinitely tall mountain known as the Spire in the center of the Outlands rests Sigil, the most prominent crossroad of the Great Ring. The City of Doors is said to have portals leading to every place in the multiverse; it just requires finding the right door and key. The portals themselves move around, and recent shakeups have taught planars that even Sigil isn’t completely reliable, but there are few planewalkers who don’t pass through it on a regular basis. Its also one of the most common spots for creatures from the Prime Material Plane to end up after accidentally leaving their plane, and some might say the best place to start before exploring the cosmos.

Of course, with portals leading to every realm in creation, you can bet there’s no limit to the number of forces that want to control it. Yet Sigil has remained neutral ground since time remembered, thanks largely to its one ruler, the Lady of Pain. She has protected the city for millennia, controlling its portals and ensuring the planes’ most powerful and dangerous creatures, even the gods themselves, cannot enter. It is Her will that keeps Sigil running and ensures that anyone who causes too much trouble is thrown into the Mazes, making the City of Doors one of the safest locales for people of every race and creed. A force beyond scrutiny, the Lady speaks to no one, but seeing Her robed form adorned in glittering blades quietly float through the streets is enough to keep most in line.

Introduction to the Planes

To Chance with Hell (Planescape) ashdate