Spirits

Immortal beings from the magical plane that have an innate ability to gather magical energy. They can subconsciously link to a being of a similar aura on the earthen plane to enable that person to become a mage.

Appearance
Spirits can belong to either the civilized, animal, or monster races. Their appearances can vary as much as those of their counterparts on the earthen plane. It is unknown what forms they take on the magical plane, but since Illuna, an elven spirit, has pointy ears in the ethereal plane, it can be assumed that spirits look similar to their matching earthen races. They also possess similar auras to them, but with an otherworldly quality.

Spirits are split into males and females, but do not reproduce. Instead, they are created by the Magium and then sent to the magical plane to replace those that died. There is no information on whether spirits appear to age.

They can theoretically live forever and fancy themselves as immortals. The desperation with which they cling to their final living moments cannot be compared to any being of an earthen existence.

Those that travel to the earthen plane do not have a physical form. Instead, their bodies consist of particles as tangible as solid light. Banshees, female spirits of the civilized races, must take on an earthen host to have a corporeal body. Without one, a spirit cannot survive for long on the earthen plane.

History
There is no information on when spirits came into being, but they would have existed for as long as earthen mages have. This could be at least over ten thousand ago, according to the self-proclaimed age of Tyrath, the oldest known mage on the earthen plane so far.

For thousands of years, magical spirits have grown in power by amassing worshipers from the earthen plane. These spirits began to call themselves "gods".

Arraka's Exile
Over five thousand years ago, the spirit Arraka began absorbing spirits similar to her in aura to become more powerful. Once the gods learned of this, they allied themselves to defeat her. Memphir, the God of Fate, used the Magium to exile her from the magical plane, along with every other female spirit of the civilized races, in order to prevent a repeat of the absorption incident. These spirits were condemned to an earthen existence, and became known as banshees. They were forced to take hosts, without which they would not survive long on the earthen plane.

Eleya's Pact
Having been outspoken about the unfair treatment that the animals of Varathia received, Eleya departed from the magical plane to live among them. Thousands of years ago, she formed a pact with the island's plants and animals to maintain a physical form, in return for her protection of them. Eleya acted as their guardian and shepherd.

Immortlality
It is uncommon for spirits to die of old age. Most live simply for the purpose of maintaining their existence.

Magical Energy
Spirits have the innate ability to gather magical energy from the magical plane.

Link to Earthen Mages
A spirit can link himself subconsciously to a similar being on the earthen plane that is still in his early stages of life. Through this, they serve as a funnel for magical energy for their earthen link.

Spells
Certain spells can only be cast by beings originating from the magical plane.
 * Golden Cage Spell: a complex, once per day spell. Upon activation, the spell can summon a rectangular, golden cage that is practically indestructible by physical means. Spells cannot pass through it, but it is very vulnerable to the aura manipulation technique. The caster can teleport out of the cage.