In the cosmology of Final Fantasy XIV, the Void is not a mere myth or an abstract realm of afterlife, but a physical parallel dimension with a tragic history. To the common citizens of Eorzea, it was long feared as a hellish abyss from which twisted monsters known as voidsent emerge. However, scholars and the Warrior of Light eventually uncovered its true identity: the Void is the Thirteenth Reflection, one of the thirteen parallel worlds split from the original world, the Source, when the Mothercrystal Hydaelyn shattered reality to seal away Zodiark.
Each of the thirteen reflections was intended to maintain a delicate balance of elemental forces and aether. The Ascians, immortal servants of Zodiark, sought to destabilize these worlds by tipping their balances toward a specific element, causing a "Flood" that would allow the shard to collapse and merge back into the Source—a process known as a Rejoining.
The Thirteenth Reflection was the Ascians' first attempt at orchestration, assigned to the Ascian Igeyorhm. However, the plan was deeply flawed. Igeyorhm moved too quickly and aggressively, completely overwhelming the world’s inexperienced Warriors of Light. Rather than maintaining a tether to the Source to trigger a Rejoining, the elemental balance broke completely.
An uncontrollable Flood of Darkness washed over the shard, instantly arresting the natural cycle of life, death, and rebirth. Because there was no corresponding elemental calamity happening on the Source at that exact moment to draw the aether across the rift, the Thirteenth did not rejoin. Instead, it became a useless, aether-starved wasteland isolated from the rest of the cosmos—the Void.
The Flood of Darkness fundamentally altered the metaphysics of the Thirteenth Reflection. In its current state, the Void is entirely devoid of ambient Light, and its environment is warped into a formless, twilight expanse of jagged, corrupted structures and floating islands.
When the Flood occurred, the souls of the living inhabitants could no longer return to the Lifestream because the cycle of reincarnation was shattered. Trapped within a dying world, these souls fused with whatever remaining corporeal matter they could find. Driven by an insatiable, eternal hunger for the aether they were starved of, they mutated into monstrous entities known as voidsent.
Voidsent society is governed entirely by a brutal survival of the fittest. Stronger voidsent consume weaker ones to absorb their aether and grow in power, giving rise to a rigid caste system classified by Eorzean scholars into twelve distinct rungs:
Lower Rungs (9th–12th): Minor, mindless pests and beasts such as imps, ahrimans, and deepeyes. They possess minimal intelligence and easily slip through minor tears in the dimensional veil.
Mid Rungs (5th–8th): Moderately intelligent predators and soldiers, such as gargoyles and succubi. Succubi often manifest on the Source by possessing the corpses of deceased mortal women.
Higher Rungs (1st–4th): Extremely powerful, highly intelligent, and ancient entities who rule over domains within the Void. This includes warlords like Diabolos, the Shadow Queen Scathach, and the supreme entities known as the Four Archfiends (Rubicante, Cagnazzo, Barbariccia, and Scarmiglione). At the absolute apex sits the Cloud of Darkness, a colossal manifestation of the Void's malevolent entity.
Though separated by a dimensional veil, the Void has deeply scarred the history of the Source due to mortal hubris and the summoning arts.
During the Third Astral Era, the technologically advanced Allagan Empire sought to harness the boundless, volatile energies of the Void. Emperor Xande formed a pact with the Cloud of Darkness, constructing the Crystal Tower to act as a massive solar and aetherial siphon. Xande intended to open a massive dimensional gate called the Syrcus Gate to unleash the Cloud of Darkness upon the Source, a plot that ultimately triggered the Fourth Umbral Calamity when the earth could no longer support the tower's sheer weight and energy output.
During the Fifth Astral Era, the black mages of the city-state of Mhach built their entire civilization around the exploitation of the Void. They perfected "voidmagicks," a school of sorcery dedicated to tearing open rifts, summoning voidsent, and binding them to the caster's will through powerful artifacts like the Nullstone.
Mhach famously constructed the Void Ark, a massive flying vessel powered entirely by siphoning the captive aether of the Shadow Queen Scathach and hundreds of her minions. This hubris backfired during the War of the Magi; the voidsent sabotaged their bindings, leading to the slaughter of the Mhachi people and contributing heavily to the Great Flood of the Sixth Umbral Calamity.
For millennia, the Void was considered a permanently dead world beyond salvation. However, recent events have challenged this absolute finality.
During the journey to the First Reflection (Shadowbringers), the Warrior of Light successfully halted a parallel disaster—the Flood of Light—proving that a world on the brink of elemental erasure could be stabilized. Following the definitive defeat of Zodiark and the ends of the Ascian threat (Endwalker), attention returned to the Thirteenth.
The dragon Vrtra sought to rescue his long-lost sister, Azdaja, who had been trapped in the Void since the Allagan era. This sparked a new expedition into the Thirteenth Reflection. There, the Warrior of Light encountered Zero, a "memoriaish"—a hybrid being who survived the initial Flood of Darkness by sealing voidsent into crystals called memoria.
Through collaboration, trust, and the deliberate reintroduction of Light aether from the First Reflection, the heroes succeeded in purifiying major sections of the Thirteenth, defeating the corrupted hero Golbez's plot, and rescuing Azdaja. While the Void remains a dangerous, twisted realm, these breakthroughs have proven that the Thirteenth Reflection is not entirely dead. For the first time since its fall, a fragile hope exists that the elemental balance can eventually be restored, and the tragic souls trapped as voidsent might one day find peace or redemption.