The official GemStone IV encyclopedia.
Aura measures a character's connection to the magical nature of Elanthia, in all forms. This includes the elemental, spiritual, and mental spheres of magic. Aura also determines the number of spirit points a character possesses, having one spirit point per 10 aura, rounded to the nearest tenth. Therefore, a character with 95 aura has 10 spirit points.
Aura is a factor in the initial mana capacity of the bard, rogue, sorcerer, warrior, and wizard professions.
Systems and Skills Affected by Aura