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This article is about the celestial objects known as crystal spheres, if you are looking for the AD&D adventure module named after them see SJA3 Crystal Spheres.
The size of crystal spheres is related to the size of the planetary system within them. As the name 'crystal sphere' implies, the objects are spherical.
Although they are solid, crystal spheres have no gravity and no atmosphere. The material crystal spheres are made of is a unbreakable dark ceramic material. No magic is powerful enough to damage crystal spheres.
Travel through a crystal sphereEdit
Only a few methods are known to allow travel from one side of a crystal sphere to the other side.
Teleport or Dimension Door spellsEdit
These spells (or magical devices that duplicate them) allow spellcasters to jump from one side of the sphere to the other without physically crossing the sphere.
Phase Door spellEdit
Naturally occurring portalsEdit
Most crystal spheres have natural portals that pierce the shell at various locations. These portals usually and vanish at random times and are located in random places. Looking for these portals can take a long time.
In some crystal spheres, stars are located on the inside of the crystal shell. A few of these stars are themselves also natural portals through the crystal sphere. A spelljamming ship diving into the heart of the star would pass through the shell and appear in the phlogiston. However, a high number of stars are portals to the Plane of Radiance or the Plane of Fire. Flying a ship into one of those stars would be fatal.
The Spelljammer and creatures like space dragonsEdit
The legendary ship, called The Spelljammer, and some large space creatures, like space dragons, seem to have an innate ability to create portals similar to the natural portals. These portals close slowly over time, so ships can sometimes use them.
The Create Portal spellEdit
This spell duplicates the natural ability of The Spelljammer and space dragons, but the portals created by this spell have a much shorter duration. Portals created via this spell last no longer than 120 minutes.
Individual crystal spheresEdit
Size of individual crystal spheresEdit
The size of crystal spheres is usually determined by the size of the planetary system within them. Each sphere usually is usually twice the diameter as the outermost planet within the crystal sphere, but spheres can be larger than this. There are often astronomical objects that defy this 'double diameter' rule and orbit outside the outermost planet. Sages who support the 'double diameter' rule usually argue that these celestial bodies are additional astronomicals rather than true planets.
It is possible for a crystal sphere to contain another crystal sphere, or a series of smaller and smaller crystal spheres.
There are six main theories about the origin of the crystal spheres.
The gods created the shells and the flowEdit
The gods created the spheres and the Phlogiston in order to divide up the universe. The gods split the universe into chaos (the flow) and order (the spheres). They then divided up the individual spheres among themselves in order to test law against chaos and good against evil.
The gods have their own godsEdit
The Phlogiston is a naturally occurring objectEdit
The Phlogiston was there before the gods. The gods built the crystal spheres to settle and domesticate the flow. The spheres are like cities built along a stream and eventually they will grow and join together. When this happens the Phlogiston will cease to exist.
The gods fear the flowEdit
The gods fear the Phlogiston and built the spheres to keep it out.
The gods fear men and other sentient beingsEdit
The gods fear humans and other sentient creatures and built the crystal spheres to keep them in.
The Phlogiston and the shells are naturally occurringEdit
Someone or something created the entire universe and the gods moved in and took over. There is a secondary implication, that the gods have lied about creating the universe to deceive mortals.
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 Concordance of Arcane Space pages 9-10
- ↑ SJR6 Greyspace page 3
- ↑ Concordance of Arcane Space Nonstandard Systems sidebar pages 68, 70 and 72
- ↑ 4.0 4.1 4.2 4.3 4.4 4.5 Concordance of Arcane Space Notes on the Creation of the Universe sidebar pages 42, 44, 46 and 48
- Crystal Spheres at Beyond the Moons (the official Spelljammer website)
- An "official" Spelljammer Guide to the Spheres by Paul Westermeyer at Beyond the Moons (the official Spelljammer website)