The lore of the @Summoner (SMN) in Final Fantasy XIV is deeply intertwined with the rise and fall of the ancient Allagan Empire, the nature of primals, and the manipulation of aether. It is a story of capturing the lingering essences of gods and turning that power back against them.
Thousands of years ago, during the Third Astral Era, the technologically advanced Allagan Empire sought to conquer the entire continent of Aldenard and beyond. As they expanded, they encountered beast tribes who, out of desperation to protect their lands, summoned powerful aetherial entities known as primals (such as Ifrit, Titan, and Garuda).
These primals possessed the terrifying ability to "temper" mortals—brainwashing them into fanatical devotion. Standard military forces were useless against them because any soldier sent to fight a primal risked being turned into a willing slave of the beast tribe's god.
To combat this existential threat, Allagan mages developed a revolutionary school of magic: Summoning.
Instead of fighting primals with conventional weapons, these mages—known as Summoners—learned to harness the residual aether left behind after a primal was defeated. By shaping this dense, elemental energy with their own life force (aether), they created miniature, obedient constructs called Egi (meaning "pure" or "essence" in the ancient tongue). For the first time, humanity could wield the world-shaking power of a primal without the risk of being tempered.
The peak of Allagan summoning magic was also its downfall. When the Allagans conquered the land of Meracydia, they faced the great dragon Bahamut, who had been summoned as a primal by his grieving kin.
Led by the brilliant and ruthless scientist Amon, the Allagans captured Bahamut alive. They imprisoned him inside a massive orbital satellite known as Dalamud, keeping him in a state of eternal torment to harvest his near-infinite solar and primal energy to power the empire.
With the primals completely subjugated and trapped in mechanical neural-links, the practical need for frontline Summoners dwindled. Over time, the art was forgotten, buried beneath the ashes of the Fourth Umbral Calamity, which eventually brought the Allagan Empire to ruin.
For millennia, summoning was considered a dead art. However, in the modern era (the Seventh Astral Era), a subterranean Allagan repository containing ancient knowledge was uncovered.
A Gridanian scholar named Y'mhitra Rhul dedicated herself to deciphering these texts. She discovered that the core mechanic of summoning relies on an individual's exposure to a primal's aether. When an adventurer (the Warrior of Light) defeats a primal, their own dynamic aetherial field is permanently altered, retaining a "signature" of that god.
By focusing this signature through a specialized conduit—a Summoner's Soul Crystal—and a complex geometric focal point (a grimoire filled with aether-conducting ink), the practitioner can manifest an Egi. Because the Warrior of Light has survived battles with numerous primals, they became uniquely qualified to revive this ancient discipline.
As a Summoner's power matures, they move beyond merely creating constructs. They learn to channel the residual ambient aether of the most devastating primal in history: Bahamut.
Because the lesser moon Dalamud bathed the entire realm of Eorzea in Bahamut's corrupted aspected aether during the Seventh Umbral Calamity, that draconic energy lingers everywhere in the atmosphere. By entering a "Dreadwyrm Trance," a Summoner temporarily links their own aetherial current to the ghost of the elder dragon, allowing them to cast devastating magics like Deathflare and eventually summon a massive, translucent manifestation known as Demi-Bahamut.
Later, through similar metaphysical anchoring, Summoners learn to commune with the aether of Phoenix—the primal of rebirth born from the hopes of Eorzea during the Calamity—allowing them to weave both destructive fire and restorative life energy.
A crucial piece of Summoner lore is the limitation of the Egi. An Egi is not the actual primal, nor does it possess a soul. It is a mathematical equation written in aether, given temporary shape by the caster's mind.
Because a mortal's personal aether pool is finite, a modern Summoner cannot manifest a full-scale primal without losing their mind or draining the surrounding land of life (creating a wasteland). The Egi is a deliberate compromise: it scales down the primal's terrifying grandeur into a stable, compressed form that a single human soul can safely govern.