Spell Matrices
A "spell matrix" is a specific crystalline formation of heavy Incarnum formed in the mind (Thereby, soul) of a spellcaster when they attempt to memorise or cast a spell. They are virtually indestructible, but in inter-Incarnum interactions are just as fragile as the personality in the Incarnum that makes them.
Where Ptolemy's Junction filters magic, a spell matrix focuses it to produce a specific effect. Because they are held deep within the soul, the actual appearance of spell matrices is completely unknown, their description as "crystalline" comes from noted wizards often describing the formation of a spell in their mind as being different concepts and necessities crystalising into their required effect.
The filtered magic is fed into the matrix and organised and arrayed before it is expelled out of the exit junction(s) of the matrix. Going by further descriptions from spellcasters, there is a rudimentary geography evident in the matrix, whereby ray spells have a single exit junction, area effect spells have many, etc. All known spells have no more than four entry junctions, most have only one or two.
Within a spell matrix, there are a number of recognised components.
- Entry junction - The point(s) at which magic enters the spell matrix. No known spell has more than four such points.
- Focus - Narrows the feed point of the magic creating a more dense and potent magic feed.
- Resonator - Oscillates the resonant frequency of the magic against itself moderated by a defined variable of the matrix, commonly used in more violent or explosive spells.
- Refraction chamber - Reduces magic from a base element to hypothetical constituent parts. Used almost exclusively in Universal school, but occasionally used in other spells to produce different school effects.
- Reaction chamber - Forces different magic types to fuse together. A highly unpredictable matrix element, usually used in explosive spells.
- Filtration - Restricts magic passing through it to a specifically defined type or frequency. Almost never used since Ptolemy's Junction was created.
- Exit junction - The point(s) at which magic leaves the matrix as a spell effect. Rays have a singular point, areas many, as needed for the effect.
The matrix itself has no regard for what magic is being sent through it, though certain elements alter slightly in direct response to certain types of magic, such as elemental fire magic or maligned magic. In theory any kind of magic could be sent through any kind of matrix, but the resulting effects would vary noticeably and the matrix may destabilise.
In general, construction of spell matrices is undertaken by arcane casters only, as divine casters have them produced by their deity. Further, with the exception of highly skilled spellcasters, they are constructed ahead of time using in-depth knowledge of their mechanics. Wizards are known to direct significant ire towards sorcerers, who are fortuitously born with matrices innately constructed within their souls.