11-26-2020, 06:00 AM
(This post was last modified: 11-26-2020, 06:01 AM by GM Anthraxus.)
Kinds of Space
Phlogiston
The Phlogiston, also known as the Flow, is made up of a gaseous substance that is also called phlogiston. This unique substance is unlike any of the four elements (air, earth, fire and water). It is similar in appearance to a radiant gas, emitting brilliant, chaotic and ever changing colors. It is odorless, and non-toxic, but does not provide oxygen and is non-breathable. This substance apparently cannot exist in Wildspace (ie, inside a Crystal Sphere), so even bottled phlogiston will fade away as soon as it passes through the wall of a Sphere.
Wildspace
Gravity is either none or the same as that of Earth, and is directed towards the center of planet-sized bodies; on large objects in space like spacecraft and enormous creatures gravity is directed towards a flat plane running through the object's long axis, allowing characters to stand on the decks of ships. Wildspace is the name given to the tractless void within the Crystal Spheres.
Crystal Spheres
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 farthest from the sun or planet at the center 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. At any given time, a spelljamming ship is 2 to 20 days away from a portal.
Each sphere varies in size but typically they are twice the diameter of the orbit of the planet that is farthest from the sun or planet at the center of the sphere (the system's primary).
Gravity and Air
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
A creature the leave the air envelope of a ship, asteroid or planet can survive for a number of rounds equal to its constitution modifier(minimum of 1 round).
Magic in Space
Divine Magic in the Phlogiston
It is difficult for a cleric, paladin or druid to communicate with their deity or force of nature outside of a crystal sphere. 3rd-level or higher spells of these classes cannot be cast while in the phlogiston. 1st and 2nd-level spells can still be cast using higher level spell slots.
Clerics in other Spheres
If a cleric's deity does not have an established group of worshippers somewhere within a crystal sphere, that cleric's spellcasting is limited as above.
Interplanar Magic in the Phlogiston
The space between Spheres is severed from all other planes: inner, outer, ethereal or astral. As such, the following spells do not function in the Flow.
Fire burns normally within the air bubbles of planets and ships, but not within the vacuum between them.
Magical fire can be created in vacuum, so fire-based spells can still be cast, but they cannot be used to fire to objects.
Fire in Phlogiston
Phlogiston is explosive, and air bubbles of ships are permeated with phlogiston.
Phlogiston
The Phlogiston, also known as the Flow, is made up of a gaseous substance that is also called phlogiston. This unique substance is unlike any of the four elements (air, earth, fire and water). It is similar in appearance to a radiant gas, emitting brilliant, chaotic and ever changing colors. It is odorless, and non-toxic, but does not provide oxygen and is non-breathable. This substance apparently cannot exist in Wildspace (ie, inside a Crystal Sphere), so even bottled phlogiston will fade away as soon as it passes through the wall of a Sphere.
Wildspace
Gravity is either none or the same as that of Earth, and is directed towards the center of planet-sized bodies; on large objects in space like spacecraft and enormous creatures gravity is directed towards a flat plane running through the object's long axis, allowing characters to stand on the decks of ships. Wildspace is the name given to the tractless void within the Crystal Spheres.
Crystal Spheres
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 farthest from the sun or planet at the center 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. At any given time, a spelljamming ship is 2 to 20 days away from a portal.
Each sphere varies in size but typically they are twice the diameter of the orbit of the planet that is farthest from the sun or planet at the center of the sphere (the system's primary).
Gravity and Air
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
A creature the leave the air envelope of a ship, asteroid or planet can survive for a number of rounds equal to its constitution modifier(minimum of 1 round).
Magic in Space
Divine Magic in the Phlogiston
It is difficult for a cleric, paladin or druid to communicate with their deity or force of nature outside of a crystal sphere. 3rd-level or higher spells of these classes cannot be cast while in the phlogiston. 1st and 2nd-level spells can still be cast using higher level spell slots.
Clerics in other Spheres
If a cleric's deity does not have an established group of worshippers somewhere within a crystal sphere, that cleric's spellcasting is limited as above.
Interplanar Magic in the Phlogiston
The space between Spheres is severed from all other planes: inner, outer, ethereal or astral. As such, the following spells do not function in the Flow.
- arcane gate
- astral projection
- blink
- conjure animals
- conjure celestial
- conjure elemental
- conjure fey
- conjure minor elementals
- conjure woodland beings
- contact other plane
- demiplane
- etherealness
- gate
- Leomund's secret chest
- Mordenkainen's magnificent mansion
- planar ally
- plane shift
- teleport
- teleportation circle
- transport via plants
- tree stride
- word of recall
Fire burns normally within the air bubbles of planets and ships, but not within the vacuum between them.
Magical fire can be created in vacuum, so fire-based spells can still be cast, but they cannot be used to fire to objects.
Fire in Phlogiston
Phlogiston is explosive, and air bubbles of ships are permeated with phlogiston.
