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This article is about the campaign setting as a whole. For other uses, see: Spelljammer (disambiguation)

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This article is based on material by: 
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Spelljammer is a campaign setting for the Advanced Dungeons & Dragons (2nd edition) role-playing game, which features a fantastical (as opposed to scientific) outer space environment.

Spelljammer introduced into the AD&D universe a comprehensive system of fantasy astrophysics, including the Ptolemaic concept of crystal spheres. Crystal spheres may contain multiple worlds and are navigable using ships equipped with "spelljamming helms". Ships powered by spelljamming helms are capable of flying into not only the sky but into space. With their own fields of gravity and atmosphere, the ships have open decks and tend not to resemble the spaceships of science fiction, but instead look more like galleons, animals, birds, fish or even more wildly fantastic shapes.

The Spelljammer setting is designed to allow the usual sword and sorcery adventures of Dungeons & Dragons to take place within the framework of outer space tropes. Flying ships travel through the vast expanses of interplanetary space, visiting moons and planets and other stellar objects.

Like the Planescape setting, Spelljammer unifies most of the other AD&D settings and provides a canonical method for allowing characters from one setting (such as Dragonlance) to travel to another (such as the Forgotten Realms). However, unlike Planescape it keeps all of the action on the Prime Material Plane and uses the crystal spheres, and the "phlogiston" between them, to form natural barriers between otherwise incompatible settings. Though the cosmology is derived largely from the Ptolemaic system of astronomy, many of the ideas owe much to the works of Jules Verne and his contemporaries, and to related games and fiction with a steampunk or planetary romance flavor. A strong Age of Sail flavor is also present.


Spelljamming helms[edit]

Spelljamming helms are the central setting concept which allow interplanetary and interstellar space travel for vessels which would otherwise not be spaceworthy. Within the Dungeons & Dragons universe, they are a method of converting magical energy into motive power.

Gravity and Air[edit]

All bodies of a sufficiently large size have gravity. This gravity usually (but not always) exerts a force equal to the standard gravitational attraction on the surface of an Earth-sized planetary body. Gravity in the Spelljammer universe is also an exceptionally convenient force, and almost always works such that "down" orients itself in a manner most humanoids would find sensible.

All bodies of any size carry with them an envelope of air whenever they leave the surface of a planet or other stellar object. Unlike real-world astrophysics, this air envelope is not dispersed by the vacuum of space. These bubbles of air provide breathable atmosphere for varying lengths of time, but 3 months is considered "standard".

Crystal Spheres[edit]

A crystal sphere (also known as a crystal shell) is a gigantic spherical shell which contains an entire planetary system. Each sphere varies in size but typically they are twice the diameter of the orbit of the planet that is furthest from the sun or planet at the centre of the sphere (the system's primary).

The surface of the sphere is called the "sphere wall" and separates the void of "wildspace" (within the sphere) from the "phlogiston" (that surrounds and flows outside the sphere). The sphere wall has no gravity and appears to be impossible to damage by any normal or magical means. Openings in the sphere wall called "portals" allow spelljamming ships or wildspace creatures to pass through and enter or exit from a crystal sphere. Portals can spontaneously open and close anywhere on the sphere wall. Magical spells (or magical items that reproduce their effects) can allow a portal to be located. Other magic can open a new portal or collapse an existing one. Ships or creatures passing through a portal when it closes may be cut in two.

Note that unlike the Ptolemaic system, the crystal spheres are not nested within each other.

The Phlogiston[edit]

The phlogiston (also known as "the Flow") is a bright, extremely combustible gas-like medium that exists between the Crystal Spheres. A signature property of the substance is that it does not exist within the boundaries of a crystal sphere, to the degree that it cannot be brought into a crystal sphere by any known means up to and including the direct will of deities. Every crystal sphere floats in the phlogiston, very slowly bobbing up and down over time. Travel between Crystal Spheres is facilitated by the formation of "Flow rivers" — sections of the phlogiston which have a current and greatly reduce travel time. Travel through the "slow flow" (i.e. off the Flow rivers) is possible, but very dangerous.

The Spelljammer[edit]

The Spelljammer is a legendary ship which looks like a gigantic manta ray, and houses an entire city on its back. All spacefarers (people who live in wildspace) have heard of the Spelljammer but very few have ever seen it themselves. It is this ship that gives its name to "spelljamming", "spelljamming helms" and anything else connected with spelljamming. The ship has been reported to have been seen in countless spheres for as long as records go back. Even some groundlings (people who live on planets that have very little or no commerce with spelljamming communities) have legends about it. There are hundreds of conflicting legends about this ship, and a mythology has developed about the ship that is similar to the legends surrounding the Flying Dutchman.

As a living thing (although it does not consume any matter, it does absorb heat and light through its ventral (or under) side and uses them to produce air and food for its inhabitants), the Spelljammer has a complex life cycle and means of procreation. Normally the ship has no captain and wanders the cosmos seemingly aimlessly. When the Spelljammer has a captain, obtained through another complex process, it will create Smalljammers (miniature versions of the Spelljammer) that go forth as its spawn. Apparently there can only be one Spelljammer at any one time. One Smalljammer will mature into a full Spelljammer ship if its predecessor is ever destroyed.


Alien races inhabiting the Spelljammer universe included humans, dwarves, xenophobic beholders, rapacious neogi, militant giff (humanoid hippopotami), centaurlike dracons, hubristic elf armadas, spacefaring orcs called "scro", mysterious arcane, the thri-kreen insectoids, and bumbling tinker gnomes. Illithids were another major race, but were presented as more mercantile and less overtly evil than in other D&D settings. The Monstrous Compendium series added many more minor races. The simian Hadozee were also introduced into the setting and, later, incorporated into the 3.5 rules in the supplemental book Stormwrack.

Publication history[edit]

Advanced Dungeons & Dragons (2nd edition)[edit]

The Spelljammer space fantasy supplement was released in 1989.[1] Several of TSR's other campaign worlds had their own sections in the Spelljammer Boxed Set - Realmspace for the Forgotten Realms, Krynnspace for Dragonlance, and Greyspace for Greyhawk. Along with the new sphere - Clusterspace - they were known as the "Big Three and Astromundi". For more details, see List of Spelljammer crystal spheres. Dark Sun, Ravenloft and Mystara weren't included, as the first two did not fit with the setting and the Mystara only used the D&D rules, not the AD&D rules.

Original Spelljammer boxed set (TSR, 1989)

The core Spelljammer product line consisted of four boxed sets: AD&D Adventures in Space (ISBN 0-88038-762-9) introduced the setting and provided the basic rules for spelljamming travel. Legend of Spelljammer (ISBN 1-56076-083-4) expanded on the setting, in particular the Spelljammer itself. The War Captain's Companion (ISBN 1-56076-343-4) provided more detailed ship-to-ship combat rules, and The Astromundi Cluster (ISBN 1-56076-632-8) provided a roleplaying campaign.

The line was expanded by a number of accessories. Lost Ships (ISBN 0-88038-831-5) expanded the number of ships, while Practical Planetology (ISBN 1-56076-134-2) assisted DMs who wished to create their own spelljamming setting. The Rock of Bral (ISBN 1-56076-345-0) provided a home base for adventuring parties, and Realmspace (ISBN 1-56076-052-4), Krynnspace (ISBN 1-56076-560-7) and Greyspace (ISBN 1-56076-348-5) gave information about the crystal spheres housing TSR's three main campaign worlds. TSR also published a DM's screen (ISBN 1-56076-053-2) and two Monstrous Compendiums (ISBN 0-88038-871-4 and ISBN 1-56076-071-0).

A series of five connected adventures was released in the modules Wildspace (ISBN 0-88038-819-6), Skull & Crossbows (ISBN 0-88038-845-5), Crystal Spheres (ISBN 0-88038-878-1), Under the Dark Fist (ISBN 1-56076-131-8) and Goblins' Return (ISBN 1-56076-149-0). Also published was a longer campaign, Heart of the Enemy (ISBN 1-56076-342-6) and Space Lairs (ISBN 1-56076-609-3) contained short standalone adventures.

When TSR started to produce a line of handbooks in 1992, they added the Complete Spacefarer's Handbook (ISBN 1-56076-347-7) to cover spelljamming travel.

A full product list is given at the TSR Archive.

Dungeons & Dragons (3rd edition)[edit]

The Spelljammer line of products was discontinued by TSR before they were incorporated into Wizards of the Coast. Although Wizards of the Coast has not produced any new Spelljammer products they have given permission for a non-profit website, named Beyond the Moons, to continue support for the setting. Beyond the Moons is the official Spelljammer website and produces new material for Spelljammer AD&D (2nd edition), and converts existing AD&D material to work with the 3rd edition game.

Spelljammer: Shadow of the Spider Moon[edit]

In 2002, Paizo published a new campaign setting for Spelljammer in issue 151 of Polyhedron magazine (with Dungeon #92).[2] Using the D20 system, it provided new rules for firearms and spelljamming, as well as skills, feats and prestige classes. Spelljammer monsters such as neogi and giff were not used. Instead, it featured creatures from the Monster Manual such as drow, formians and yuan-ti.

Dungeons & Dragons (4th edition)[edit]

Spelljammer content appears in the 4th edition Manual of the Planes,[3] referencing Spelljammer ships as one method of traveling between planes (and providing information for in-game use for an example Spelljammer vessel).

Dungeons & Dragons (5th edition)[edit]

Spelljammer content appears in Storm King's Thunder. They use a deck plan of a Squidship and give the stats for it as a sailing ship in the 5th edition DMG.

Hackjammer and Hackmaster[edit]

In 2005, Kenzer & Co. released Hackjammer (ISBN 1-59456-037-0), a campaign supplement which converted much of the Spelljammer setting to the Hackmaster system.


As was common practice at TSR at the time, a number of tie-in products were produced for the Spelljammer line.


Fifteen comics set in the Spelljammer universe were published by DC Comics between September 1990 and November 1991 with the creative team of Barbara Kesel, Michael Collins and Dan Panosian. Spelljammer comics also uses Jasmine, a winged human character originally introduced from Forgotten Realms comics, as one of the lead characters.


Six novels set in the Spelljammer universe were published by TSR, before TSR was incorporated into Wizards of the Coast. The novels were interconnected and formed The Cloakmaster Cycle. The novels tell the story of Teldin Moore, a 'groundling' farmer on Krynn who has a powerful and apparently cursed magical cloak that was given to him. He then ends up on a quest, which takes him first into wildspace and then away from his home sphere to distant crystal spheres. The series showcases the wonders and perils of the Spelljammer universe. The novels are now out of print.

Computer games[edit]

Only one computer game set in the Spelljammer universe was ever produced. It was published by SSI in 1992 and was called Spelljammer: Pirates of Realmspace.

In 2002 a team of freelance game modification developers created "The Arcane Space Tileset" for Neverwinter Nights. This tileset included Spelljamming ships, Space and Atmospheric terrains, along with Monsters and NPC's, all set within the Spelljammer Campaign setting.

Publications on Spelljammer[edit]

Author Publication List
Publication System Publisher
AD&D Adventures in Space Dungeons and Dragons 2e TSR
Beyond the Moons Novel TSR
Crystal Spheres Dungeons and Dragons 2e TSR
Goblins' Return Dungeons and Dragons 2e TSR
Greyspace Dungeons and Dragons 2e TSR
Heart of the Enemy Dungeons and Dragons 2e TSR
Into the Void Novel TSR
Krynnspace Dungeons and Dragons 2e TSR
Lost Ships Dungeons and Dragons 2e TSR
Monstrous Compendium Spelljammer Appendix Dungeons and Dragons 2e TSR
Monstrous Compendium Spelljammer Appendix II Dungeons and Dragons 2e TSR
Practical Planetology Dungeons and Dragons 2e TSR
Realmspace Dungeons and Dragons 2e TSR
Rock of Bral Dungeons and Dragons 2e TSR
Skull & Crossbows Dungeons and Dragons 2e TSR
Space Lairs Dungeons and Dragons 2e TSR
Spelljammer Dungeon Master's Screen Dungeons and Dragons 2e TSR
The Astromundi Cluster Dungeons and Dragons 2e TSR
The Broken Sphere Novel TSR
The Cloakmaster Cycle
The Complete Spacefarer's Handbook Dungeons and Dragons 2e TSR
The Legend of Spelljammer Dungeons and Dragons 2e TSR
The Maelstrom's Eye Novel TSR
The Radiant Dragon Novel TSR
The Ultimate Helm Novel TSR
UA 2021 Travelers of the Multiverse Dungeons and Dragons 5e Wizards of the Coast
Under The Dark Fist Dungeons and Dragons 2e TSR
War Captain's Companion Dungeons and Dragons 2e TSR
Wildspace Dungeons and Dragons 2e TSR

Spelljammer Articles[edit]

5e Spelljammer Articles[edit]


See also[edit]

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