Tartarus

Tartarus is an Angel of Hades and former 81st-ranked Grim Reaper who constructs the prison known as the Abyss of Nightmares. Although the prison is initially described as a sentient World named Tartarus, later evidence corrects that belief: the apparent World is an artificial structure built from Tartarus's energies after he reached Stage 4. His true body is a petrifying, tree-like person hidden beyond the Nightmare's layers.

Biography

The prison that draws in the condemned

Tartarus first becomes known to the Executioners as an independent World that draws travelers with high negative karma through Shift Points on the Blood Sea. Entry is easier than escape: the barrier closes behind arrivals, outside connections are cut, and anyone who moves too far away is pulled back. The world's living realm and Underworld also occupy the same space, making Tartarus resemble both a cosmic prison and a complete afterlife governed by its own apparent World Core. (Chapters 395, 398–400, and 425)

The prison does not capture only individuals. It swallows entire Worlds judged to have accumulated excessive negative karma and turns them into Zones. Outsiders want to find the hidden Core and force it to release them, while people born inside fear that destroying it will destroy them as well. Wars between those groups produce the Dragon Clan order and repeated Grand Expeditions into the Abyss, allowing Tartarus to hide personal judgment behind an apparently natural struggle over a World. (Chapters 400, 416, and 421)

The Abyss and the borrowed face of Hades

The Abyss of Nightmares is not the dungeon the Expeditions believe they have mapped. Its public floors form a collective Nightmare holding conscious minds together, while each captive's subconscious is trapped in a tailored individual Nightmare. Pillars stabilize the layers, the Nightmare Tree protects the bodies, and Tartarus kills escapees who discover the deception. These rules let the prison inflict punishment through fear, regret, and repeated experience while concealing the location and nature of its architect. (Chapters 425–426, 442, and 463)

Inside Tyr's subconscious Nightmare, Tartarus uses a body with Hades's appearance, soul, seed of existence, and Intent. This figure is neither Hades himself nor Tartarus's tree-bodied original: it is a Shadow Core copy controlled by Tartarus and serving as a Layer 5 Pillar. Zera's identification of Tartarus as Hades's Angel explains why Hades's blood reduces the prison's physical and psychological damage to Neo Hargraves, but it does not make the impersonation genuine. (Chapters 445, 463, 512, and 525)

Puppets, Pillars, and absolute judgment

Layer 4 reveals what prolonged imprisonment does to Tartarus's population. Darkness gradually consumes the bodies and souls of real captives; Shadow Core then supplies fabricated replacements for surviving consciousnesses. Some arrivals retain agency, others become fully governed by the Nightmare, and entirely created people act through commands written into them. The system can preserve memories and relationships, but only by placing them inside bodies and identities Tartarus can revise, kill, or recreate whenever punishment requires it. (Chapters 459, 499, 503–504, and 529)

Tartarus defends this order as perfect justice. He empowers Protectors with fragments of his Stage 4 strength, relies on Great Disasters to intervene where the Nightmare's rules restrain him, and attempts to turn Neo into a replacement Pillar. Asked whether intention matters, he argues that even a mother stealing food for a child remains evil because only the harmful result counts. Neo's memories of condemned Worlds instead reveal tragedy, coercion, and sacrifice that Tartarus ignored, turning their battle into a conflict over who has the right to judge. (Chapters 489, 499, 503, 519, 522, and 525)

Defeat, petrification, and erasure

When Kane Williams's Trait is unsealed, Kane and Neo dismantle the remaining structure from different sides. Kane cleaves multiple layers and holds back the Nightmare World's counterattack while Neo defeats and devours the Hades copy. Beyond an obsidian gate they find Tartarus's true body: a tree-like man on a throne, much of him already petrified. He identifies himself as Hades's 81st-ranked Grim Reaper and admits that the memories preceding his construction of the prison have disappeared. (Chapters 524–525 and 529–531)

Tartarus explains that recent arrivals can survive the prison's destruction, deeply assimilated captives may not, and created people will vanish with it. He then tries to provoke Neo into hating him, apparently hoping the son of his God can destroy the prison without remorse. Neo recognizes the attempt but still accepts responsibility for ending the system. Soon afterward, the Eternals identify Tartarus as an Ashborn from another Eon Strand and prune him, associated lives, and related history, overwriting the timeline so completely that most people no longer remember he existed. (Chapters 529, 531–533, 535, and 538)

The legacy of an erased hell

Pruning removes Tartarus from ordinary history, but its consequences survive through paradox-resistant memories and later testimony. Percival eventually tells Amelia de Beaufort what her mother endured and how she died there, deepening Amelia's anger toward Neo as well as her guilt over the dreams she once dismissed. Tartarus thus remains a cause of damaged relationships long after the prison itself has been removed from the shared past. (Chapter 715)

The ending reverses the prison's judgment of created lives. Neo and Beelzebub restore people who had vanished with Tartarus or been pruned from history, including Tyr, Celestra, both versions of Ava, soldiers, and other inhabitants. Tartarus is not named among those restored. The distinction preserves the people once called fake without rebuilding their jailer, separating the reality of their consciousnesses from the morality of the being who made and controlled them. (Chapter 832)

Appearance and personality

Tartarus's true body resembles a person made from bark or a tree-like man. As his strength declines, parts of that body turn into stone until little beyond his eyes and mouth remains unaffected. He hides this form in an isolated layer behind the artificial World, while the figure most opponents first meet uses Hades's face. The two appearances belong to a true body and a controlled copy, not to a physical transformation into Hades. (Chapters 503–504, 512, 525, and 529)

He is articulate, proud, and uncompromising about punishment. Tartarus dismisses motives and mitigating circumstances, classifies harmful acts as evil by result alone, and treats his values as too firm to be challenged by someone who has not founded a personal justice. That certainty coexists with manipulation: he hides the prison's nature, overwrites consciousnesses, and uses the apparent reversibility of created lives to justify killing them as leverage. (Chapters 426, 489, 499, 524–525, and 529)

His final conduct reveals more complexity without undoing the harm. Tartarus has lost the memories that might explain why an Angel of impartial death became an absolute jailer. After defeat, he antagonizes Neo while quietly preparing to “fall with grace” by helping Hades's son bear the choice of destroying the prison. The gesture shows loyalty to his God and awareness of guilt, but it arrives only after centuries of refusing mercy to those under his control. (Chapter 531)

Powers and limitations

The artificial Nightmare World

Tartarus constructs a layered prison from Nightmare and many other energies. It contains Zones made from captured Worlds, collective and individual Nightmares, time-reset mechanisms, barriers against outside connection, and Pillars that support each layer. The system is not a literal World Core. It is a World-like product of Tartarus's Stage 4 power, and its complexity binds it to rules that prevent unrestricted intervention. Tartarus therefore requires Protectors, Great Disasters, and programmed inhabitants to act directly on his behalf. (Chapters 400, 421, 442, 463, 489, 524, and 533)

Shadow Core, Darkness, and copied identities

Shadow Core lets Tartarus reproduce bodies, souls, matter, and even Intent according to his understanding. He uses it to house consciousnesses after Darkness consumes their original bodies and to construct the Hades-shaped Layer 5 Pillar. The copy can wield a convincing identity, but destroying or devouring it does not itself reach Tartarus's true body. The Abyss's layers and Pillars must first be broken to open the separate space where that body is hidden. (Chapters 499, 503–504, 512, 525, and 529)

Judgment and divine bond

Tartarus detects negative karma, captures people and Worlds he judges evil, and shapes punishment around their minds. His doctrine follows his understanding of Hades's impartial justice, yet it ignores motive and permits indefinite coercion. As Hades's Angel, Tartarus cannot harm his God, while Hades's blood gives Neo partial resistance to Tartarus's physical and psychological attacks. This bond is protective rather than obedient: Hades is absent, and Tartarus independently interprets what his God's justice requires. (Chapters 399, 421, 442, and 445)

Weaknesses and decline

The prison is strongest as a system of mutually supporting layers. Destroying Pillars weakens its rules, opens paths to deeper layers, and eventually exposes the true body. Tartarus's own power also decays from Stage 4 to somewhere above peak Stage 3 but below Stage 4, while petrification steadily consumes him. World-damaging Concepts, Neo's understanding of Shadow Core, Hades-derived resistance, and Kane's existence-dividing Demon each counter a different defense rather than providing one universal weakness. (Chapters 445, 499, 503, 524–525, and 529)

Power progression

Relationships

Hades and Neo Hargraves

Tartarus is Hades's Angel and models his prison on Hades's reputation for impartial death. Because Hades is absent and Tartarus has lost his earlier memories, imitation hardens into doctrine without correction. Neo receives both sides of that inheritance: his father's blood protects him from part of Tartarus's power, while Tartarus's use of a copied Hades body makes the conflict personally insulting. After losing, Tartarus addresses Neo as the son of his God and tries to help him carry the final destruction. (Chapters 445, 512, 525, 529, and 531)

Kane Williams

Kane first tolerates Tartarus to protect the created Ava, even after an earlier grief-driven rampage destroys several prison layers. Tartarus exploits that attachment by making Ava a Pillar and treating her death as reversible. Once Ava is killed again, Kane rejects the bargain: he can believe she was real to him without preserving the mechanism that makes her a puppet. His existence-dividing sword then becomes essential to exposing Tartarus's true body. (Chapters 419–420, 459, and 524–529)

The prisoners and Great Disasters

Tartarus describes captives as criminals under punishment, but their actual relationship to him ranges from recent prisoner to assimilated puppet to wholly created consciousness. The Great Disasters and Protectors provide enforcement the Nightmare cannot perform directly. Nyxtharion's bargain—service in return for Hades's blood—shows that some allies enter willingly, yet even they lose memories and agency under Tartarus's system until loyalty becomes indistinguishable from programming. (Chapters 463, 489, 499, 519, 522, and 529)

Items

Tartarus does not have a separately catalogued personal artifact. The Abyss of Nightmares is his constructed prison and extension of power, not a conventional carried item or a true World Core. The Hades-shaped Pillar is likewise a Shadow Core-created body under Tartarus's control, not a resident Hades, an owned relic, or Tartarus's original body. (Chapters 442, 463, 512, 525, 529, and 533)