Adepts of the art of arcanum derive their might from symbols of power born of geometric techniques hailing from across the southern seas. Held within occult grimoires, these symbols lend shape to the arcanist's aether, thereby allowing him to produce myriad powerful spells.
Using the selfsame symbols to unlock the latent power contained within gemstones, arcanists are also able to summon forth the familiar known as Carbuncle to carry out their bidding.
The beast tribes of Eorzea worship and summon forth beings known as primals, among which are Ifrit, Garuda, and Titan. Yet what is a god to one man is a demon to another, for the city-states of Eorzea see these beings as a grave threat to their collective survival.
In times immemorial, there lived mages who had not only the power to summon the primals, but also the means to transmute the primals' essences, thus binding them to their will. Known simply as summoners, the existence of these men and women and their arcane art have been all but lost to the ages.
In an age long past, when mankind flourished under the radiance of arcane mastery, the island of Vylbrand was home to a city-state called Nym. Though the history of that age tells of countless wars waged with earth-shattering incantations, it was the brilliant strategic maneuvering of Nym's scholars that allowed their mundane army of mariners to throw back would-be conquerers time and again. These learned men and women defended the freedom of their tiny nation with their unique command over spell-weaving faeries, utilizing the creatures' magicks to heal the wounded and bolster the strength of their allies.