Black Seol Jihu

Black Seol Jihu is the will of a failed future Seol Jihu, manifested through Future Vision to change the life that precedes his own. He is neither the present Seol's permanent second personality nor an independent person who can remain beside him in the present world. Within the Path of the Soul, however, he becomes Seol's harshest identity mirror and one of his most consequential teachers, passing on hard-earned technique, exposing the weaknesses hidden by borrowed power and fortunate victories, and later supporting him against the Parasite Queen. His failed life is therefore not a fixed prophecy. It is a warning that helps the present Seol build a different future.

Biography

A failed future becomes a corrective mirror

Black Seol Jihu first acts as the caustic observer of Seol's Path of the Soul trial. He refuses to let difficult terrain, exhaustion, or a passing score become excuses, because the Parasites would never pause for favorable conditions. After Seol clears the first slope, Black attacks the premise behind his confidence: Seol cannot explain the realm he claims to possess, has received much of its effect through the Spear of Purity, and still depends on Future Vision and allies to survive threats beyond him. Black contrasts that borrowed familiarity with the independent realm he reached through repeated failure and experience. His mockery is thus deliberately personal. As an alternate self, he knows precisely which rationalizations will sting, and uses them to force Seol to examine the gap between possessing power and understanding it. (Chapter 163)

The resemblance does not make their histories interchangeable. The present Seol entered Paradise through the Gold Mark, whereas Black entered as a slave, and Black eventually accepts that this difference produced a fundamental divergence in how they developed. His future ended with him as the Level 8 Spear Demon called the Unchosen One: despite extraordinary martial skill, no god appointed him an Executor or gave him a divine vestige. He did not possess the Spear of Purity or Godslaying and had to rely on mentally expensive reinforced-sword-qi techniques against Army Commanders. These disadvantages explain both his envy and his urgency. He is not proof that the present Seol must fail in the same way; he is the experienced survivor of one path trying to keep another version from repeating its errors. (Chapters 164, 166)

Black's realism includes an honest account of his own ceiling. When Seol asks whether he can defeat a divinity-released Army Commander alone, Black says no. He killed Abhorrent Charity only with help, and even his late-life mastery could not erase the difference between a mortal and an enemy wielding divinity. That admission changes Seol's reason for continuing the brutal trial: if even Black could not guarantee victory, the present Seol cannot expect luck to rescue him again. When Black realizes that Seol's refusal to stop comes from fear of failing Paradise rather than empty stubbornness, his posture changes from contempt to worried supervision. The failed future has succeeded in making Seol face reality, but the present Seol's resolve also forces Black to reconsider what this different self might achieve. (Chapter 164)

From breaking limits to teaching technique

The second trial pushes Seol toward emotional and physical collapse. Black initially raises the difficulty to strip away Seol's senses and make intuitive action replace conscious delay, but after watching him die and repeat the attempt well over a thousand times, he tries to end the exercise and restore the original conditions. He is frightened by Seol's tears, mechanical behavior, and fading reason, and later asks Baek Haeju to help stop him. Yet when Seol persists, Black does not abandon him. He watches closely, restricts only the requested senses, and recognizes the moment Intuition and Perfect Harmony begin working together. His severity therefore has an explicit boundary: he is willing to make training lethal inside the trial, but not indifferent to the possibility that the student will destroy the mind needed to use what he learns. (Chapters 163–164)

Once Seol reaches the necessary realm, Black turns from trial overseer into a direct instructor. He helps Seol create Sword Qi Wave, then teaches him to redirect force through Thousand-Ton-Pushing Strength, merge his energy with an opponent's flow through Floral Substitution, and combine pushing, sliding, and returning into Grand Cosmic Shift. He also teaches the destructive Hell Severing and his self-created Awakening Skill, Thousand Thunder. The lessons continue while Seol climbs because Black, like Jang Maldong, treats experience and training as the same process. The result is not instant inheritance from an alternate self: Black explains principles, begins mana flows for Seol to reproduce, corrects errors, and waits until Seol's own control is sufficient to create the abilities. (Chapters 164–165)

Their first long period together ends when Seol reaches the summit under his own power, fulfilling Black's contract with Gula. As his manifestation dissolves, Black says he has taught everything he can and insists that Seol complete the remaining work himself. He recommends learning Dual Spear and Berserk with contribution points, developing Mana Cultivation into a Mana Technique, avoiding a Reverse-Flow method like his, and treating Thousand Thunder with extreme caution. He also thanks Seol for walking a path different from his own. Seol, who never experienced Black merely as another version of himself, mourns him as a reliable older brother and irreplaceable childhood friend; he then returns to the boulder alone and develops further movement and mana refinements after Black is gone. (Chapters 165–166)

Taking control during the Imperial Oath disaster

Black continues shaping decisions even while absent. Seol remembers his warning that the unstable Harmonia Magic Square should not be combined with Berserk or Thousand Thunder and chooses the safer of the dangerous techniques available to him. He also compares present choices with what Black did in the failed future, including Black's pragmatic willingness to preserve useful people. These recollections do not turn Black's history into a script: Seol sometimes deliberately chooses differently. What persists is the habit Black taught him—identify the real cost, distinguish a necessary gamble from self-deception, and accept responsibility for whichever path he takes. (Chapters 175, 178, 181–182)

When five Army Commanders overwhelm Seol during the Imperial Oath expedition, Future Vision activates and Black's consciousness takes control of the collapsing body. Black combines his Level 8 realm with the present body's greater physical level, drives back the Army Commanders, and nearly kills Sung Shihyun before the Parasite Queen intervenes and throws him into a pit. After she injects her divinity into Seol's ruined body, Black refuses a suicidal attempt to inflict one last wound. He provokes the enemy, pretends that he intends to fight, and escapes once their guard is directed toward confrontation. The choice preserves the possibility of resurrection, since damaging the Queen would not justify surrendering Seol's chance to return. (Chapters 186–187)

Escape only creates time for the harder decision. The Queen has arranged matters so that her divinity will survive ordinary resurrection, potentially leaving Seol permanently compromised. Black therefore uses the Harmonia Magic Square despite his earlier prohibition, adds Absolute Evil to the foreign divinity and lightning essence already in the body, and employs his Reverse-Flow Mana Technique to force neutralization rather than coexistence. The process destroys Seol's mana circuits and cannot remove every trace, but it greatly reduces the contamination before death. Black endures it because his request helped place his “only friend” in danger and then keeps the body walking after its human limits have been exceeded. When present Seol regains consciousness, he unusually retains faint memories of the takeover and Black's final encouragement, making the future will's intervention part of his own remembered experience rather than a blank interval. (Chapters 186–187, 190)

Training the coalition and returning for the final battle

Before the final war, Gula manifests Black again inside the Path of the Soul. Seol conceals his identity from the coalition and presents him as a divine helper, but Black quickly becomes more than Seol's private instructor. He identifies Phi Sora's slow reactions as the obstacle to her movement, gives similarly sharp diagnoses to anyone willing to ask, and teaches for entire days because the manifestation does not need food or sleep. His method differs from Jang Maldong's orderly progression: Black is poor at patient, step-by-step explanation but exceptionally good at locating a flaw and naming the direction of improvement. Even people angered by his insults seek him out because following the advice produces visible results. (Chapter 194)

Black also resumes work with Seol, though their relative positions have changed. In a spar, Black's flawless spearmanship, battle experience, and application delay defeat, but the present Seol's much higher physical level, denser reinforced sword qi, and stronger techniques eventually overwhelm him. Black accepts that there is little left he can teach directly and instead thinks through Seol's remaining flaws with him, studies unused aspects of the Spear of Purity, serves as a mock opponent, and describes the Parasite Queen from his limited experience. He advises the wider war plan as well: his account of how allied tools and Dwarven Thunders enabled Abhorrent Charity's defeat helps humanity design its attack on Unsightly Humility, while his experience informs preparations against other Army Commanders. His value has shifted from being the strongest version of Seol to being the coalition's most experienced record of a lost war. (Chapters 194, 199)

Gula cannot solve the time conflict by making Black one of Seol's Servants. A will can receive that appointment only if it exists in the Apostle's timeframe; Black is a future will, and outside a special space such as the Path of the Soul only one Seol can exist in the present world. He instead fulfills his promise through Future Vision during the battle with the Parasite Queen. Because present Seol has grown enough to withstand the overlap, Black no longer displaces his consciousness. Seol moves his own body while Black supports his technique, calls directions, reads openings, and joins his control with Seol's Trinity Harmony through Seamless Sublimity. Their cooperation keeps Seol fighting and helps deliver the thrust that opens the final attack, but Black remains an assisting will rather than a second physical combatant. (Chapters 196, 200–201)

A changed future and lasting counsel

Victory confirms the difference between warning and destiny. Black later explains his own failure in terms broader than combat: he had no dream or will to achieve it and allowed fate to drag him forward without looking toward a desired future. Present Seol turns that confession into a principle that choices, repentance, and sustained intent can change where the same person arrives. Black's life retains its value precisely because it is not reproduced. Its ruined endpoint gives Seol knowledge of what passive submission to fate costs, while Black's instruction gives him tools with which to act differently. (Chapter 204)

After the war, Seol asks Gula to reopen the Path of the Soul and consults Black again. Black appears as a young man in black armor who looks like Seol, though more exhausted than before, and advises him to observe rather than forcibly rewrite the future. He explains a reverse of Future Vision: present Seol's will could temporarily manifest in a consenting future self as a kind of Past Vision. The later future Seol whom the protagonist visits is therefore not Black physically relocated into that era; Black is the adviser who proposes the visit and warns against treating it as a magical solution. Seol returns having gained a guidepost for present action, and later memories of Black continue influencing his choices. The latest supplied retrospective still describes Black as having left after the summit, preserving his status as a future remnant who can be consulted through exceptional manifestation rather than a permanent resident of the present. (Chapters 222–226, 253)

Appearance and personality

Black Seol Jihu looks like the present Seol Jihu and is most consistently distinguished by black armor, in contrast with the visual “Blacky” and “Snowy” shorthand used for the two alternate selves. When Seol visits him after the war, the narration describes a young man in black armor who looks exactly like him. Black commonly carries a spear while training or fighting, smokes cigarettes, and favors casual, rough gestures even inside solemn conversations. His manifestation can reflect the condition of the future will rather than present Seol's changed development: by a later visit he appears more emaciated and exhausted, while an earlier explanation states that his body remains that of his original future self even when present choices alter what will happen next. (Chapters 164–165, 194, 222–223)

His dominant manner is provocative, profane, and relentlessly practical. He mocks Seol's achievements, targets pride whenever it conceals ignorance, and treats combat conditions as facts that cannot be negotiated away. The same attitude marks his coalition teaching: he may insult a student for relying on purchased growth or threaten to demonstrate a flaw by force, but the technical diagnosis beneath the abuse is usually exact. Black also enjoys food, complains theatrically, smokes despite telling Seol to quit, and can turn a serious exchange into a prank or an argument. The result is a deliberately difficult teacher whose humor and hostility keep others from romanticizing either him or the future he represents. (Chapters 163–165, 194, 222–223)

The cruelty is not the whole personality. Black becomes alarmed when Seol's mind begins to break, tries to reduce the trial's difficulty, and supports the choice to continue only after understanding its motive. He teaches with sustained passion, takes responsibility for the Imperial Oath disaster, and spends the body's last strength protecting his friend's chance to resurrect. He is jealous that present Seol received opportunities he lacked, yet sincerely thanks him for choosing another road and later takes pleasure when multiple trainees surpass the Path's limits. His realism can become cold—he is willing to use allies as a shield in the final battle—but it is paired with loyalty, accountability, and a wish that another Seol live better than he did. (Chapters 164–165, 186, 194, 200)

Abilities and class

Black Seol Jihu's highest stated class is Level 8 Spear Demon. His failed future earned him extraordinary mana control, spear technique, battlefield experience, and an optimized independent realm, but not an Executor appointment, divine vestige, Godslaying, or the Spear of Purity. His only EX-rank stat is stated to be Mana during a later comparison, while present Seol has several EX-rank stats and Divine Beginning-rank Mana. Black can compensate for part of that gap through application and experience, not erase it. This distinction is central to his role: he possesses knowledge the present lacks, while the present eventually develops a stronger body and powers Black never received. (Chapters 163–166, 194)

Spearmanship, sword qi, and Seamless Sublimity

Black's spear style is built on eliminating wasted motion. He describes his later independent achievement as Peerless Flawlessness, while his Level 8 class ability Seamless Sublimity embodies movement refined toward perfection. He can redirect massive projectiles, deploy Spear Barrier, generate reinforced sword qi, and use Hell Severing by compressing already-condensed energy into a smaller mass before bursting it. His control and timing initially dwarf Seol's: simply showing how sword qi can be perceived and released helps Seol create Sword Qi Wave. In the final battle, Seamless Sublimity overlaps with Seol's Trinity Harmony, allowing Black's optimization to support a body and realm different from his own. (Chapters 163–165, 186, 194, 200)

The style has clear comparative limits. Black admits that a divinity-released Army Commander is difficult for him to defeat alone and that Abhorrent Charity fell only through coalition support. He developed Seamless Sublimity partly to match the Parasite Queen's speed, but later acknowledges that her movement exceeded flawless optimization and that his own approach failed. His mock battles cannot fully prepare Seol for the Queen's range, power, or unfamiliar techniques. Even his superior spearmanship loses to present Seol once the difference in physical level and energy becomes too large. Seamless Sublimity is therefore a highly refined mortal solution, not omniscience or automatic superiority over divine opponents. (Chapters 164, 194, 198–200)

Spatial redirection and technical instruction

Black teaches a connected family of redirection techniques. Thousand-Ton-Pushing Strength uses softness against hardness: the user reads force, direction, and equilibrium, sends mana toward the point of contact with the ground, and displaces the target instead of opposing its full weight. Floral Substitution adds the user's force along an opponent's existing movement, requiring knowledge of how energy travels through the opponent and manifests outside the body. Pushing, sliding, and returning force together form Grand Cosmic Shift, which Black considers essential against the Parasite Queen's ability to overturn heaven and earth. He teaches by guiding Seol's arms and mana first, then withdrawing support until Seol reproduces the control himself. (Chapters 164–165)

Black later applies the same diagnostic intelligence to other students. He identifies reaction speed rather than raw running speed as Phi Sora's immediate obstacle, gives tailored advice to coalition members, and can expose how a person should change even when he cannot supply Jang Maldong's incremental curriculum. He and Seol also study the crescent blades of the Spear of Purity and mentally rehearse responses to the Parasite Queen. These feats support his description as an excellent instructor and adviser, not a claim that he invented every later technique his students develop. Seol's Ethereal Shift-like movement, refinements after the first summit, and new final-war abilities remain products of Seol's own continued work. (Chapters 165–166, 194)

Thousand Thunder and dangerous mana methods

Thousand Thunder is Black's self-created Awakening Skill. It divides energy into a thousand streams, converts them into lightning, condenses them, and ignites the body to increase physical reflexes and amplify the user's other skills rather than merely improving movement speed. Black pairs it with Hell Severing for destructive output. He never raises his own Thousand Thunder beyond Intermediate rank and orders Seol to respect the same limit, because crossing the safe line can make the body explode and kill the user. He considers Seol at still greater risk because of the Essence of Lightning. The warning is part of the technique, not an optional caution appended to an otherwise safe power. (Chapter 165)

His Mana Technique is Reverse-Flow Mana Technique, a dangerous method that reverses energy circulation. Black explicitly tells Seol to evolve his Mana Cultivation without copying this path and objects to combining the unstable Harmonia Magic Square with Berserk or Thousand Thunder. He violates his own prohibition only after the Parasite Queen contaminates Seol's dying body. In that exceptional case, he uses the square and Reverse-Flow Mana Technique to pit incompatible energies against one another and reduce the foreign divinity before resurrection. The result mangles the body's circuits and leaves residual energy behind. It demonstrates both the method's utility in a crisis and why Black refuses to present it as ordinary training. (Chapters 165, 178, 186, 190)

Future Vision and temporal restrictions

Black is a will from the future whose purpose for Future Vision was established through a contract with Gula. The ability can accelerate growth, overlap the two selves' capabilities, and under extreme conditions let his consciousness replace the present Seol's. As Seol grows, the relationship changes: he first remembers only fragments after a takeover and later remains fully conscious, moves his own body, and receives Black's support during activation. Black can also be manifested within the Path of the Soul, a special space isolated from the present world's ordinary causal restrictions. (Chapters 165, 185–187, 194, 196, 200)

Those mechanisms do not make him freely corporeal. Gula states that only one Seol Jihu can exist in the present world, and a future will cannot become the present Apostle's Servant because they do not share a timeframe. Black's later proposal for visiting the future similarly requires present Seol's will to manifest temporarily in a consenting future self; it does not send a second permanent body through time. These restrictions distinguish Black from present Seol, from a conventional summoned Servant, and from the later future Seol encountered in the side story. His interventions depend on Future Vision, divine mediation, or a causally isolated space. (Chapters 196, 222–225)

Power progression

Relationships

• Seol Jihu: Black is a failed future version of Seol, but their bond develops as teacher, older brother, close friend, and eventually combat partner. He attacks Seol's reliance on luck and borrowed power, teaches him techniques that require personal understanding, and thanks him for creating a different future. During the Imperial Oath disaster he protects Seol's chance to resurrect; during the final battle he supports rather than replaces Seol's consciousness. Their closeness never cancels their distinction as people shaped by different entries into Paradise and different choices. (Chapters 163–166, 186–187, 194, 196, 198–200, 222–225)
• Baek Haeju: Baek Haeju visits the Path of the Soul with food and challenges Black over how far he is pushing Seol. Black keeps her away when he believes her presence will interrupt the training, but later seeks her help when Seol approaches mental collapse. Their conflict exposes the tension in his mentorship: Baek fears he is turning Seol into a monster, while Black believes ordinary preparation cannot survive the coming divine enemies. Both nevertheless watch over Seol, and Black's restrictions soften when the student's safety genuinely exceeds the lesson's purpose. (Chapters 163–165, 194)
• Gula: Gula mediates Black's relationship with the past. His contract with her makes him leave the first manifestation once Seol reaches the summit, and her power later manifests him again in the Path of the Soul. She also enforces the causal boundary that prevents him from becoming Seol's Servant or existing as a second Seol in the present world. Their arrangement lets Black transmit experience without turning the failed future into an unrestricted physical intervention. (Chapters 165, 194, 196, 222–223)
• Phi Sora: Phi Sora is one of the coalition members Black advises before the final war. He provocatively identifies reaction speed as the weakness preventing her progress and directs her toward dodging and responsive movement rather than blind repetition. She dislikes his tone but cannot dismiss the diagnosis. His later knowledge of a possible future involving her belongs to his future perspective and advice; it does not make that possibility an event he has already imposed on the present. (Chapters 194, 222–226)
• Eun Yuri: Black evaluates Eun Yuri as someone who thrives through her own work and tells Seol that she can be trusted with greater independence. Her idea that a strong will might become an Apostle's Servant also prompts Seol to ask whether Black can be appointed, leading Gula to clarify that a future will is temporally ineligible. Their connection is mostly indirect, but it helps establish both Black's judgment of capable students and the precise limitation on his existence. (Chapters 165, 167, 196)
• Parasite Queen: The Queen is the divine opponent against whom Black measures both his life's failure and Seol's necessary growth. Black studies her, develops Seamless Sublimity in an unsuccessful attempt to answer her speed, and admits that his experience cannot produce a reliable strategy against a god. He still frustrates her Imperial Oath plan by preserving Seol's resurrection and later supports Seol through Future Vision in the decisive fight. Their conflict defines his ceiling as a mortal while allowing his incomplete knowledge to become one component of a coalition victory. (Chapters 164–166, 186, 194, 198–201)

Items

Spear of Purity

The Spear of Purity belongs to present Seol Jihu, not Black Seol Jihu. Black handles it inside the Path of the Soul and through control or overlap with Seol's body, using it to demonstrate how poorly Seol understands a divine weapon that has already granted him access to power. In Black's own failed future, he explicitly lacked both the spear and its Godslaying Authority and regretted having to fight divinity with reinforced sword qi alone. His familiarity with the present spear is therefore instructional and temporary custody, not evidence that his original Level 8 career included it. (Chapters 163–166, 186, 194, 200–201)

The weapon also marks how the two selves eventually complement rather than duplicate one another. Black contributes optimized motion, tactical experience, and direction; present Seol supplies the spear's Authorities, the stronger body, Trinity Harmony, and the will to move. During the final activation of Future Vision, Black supports Seol's grip and timing while Seol remains the person wielding the weapon. Their combined thrust helps reach the Parasite Queen, but the outcome depends on the present wielder, his allies, and powers the failed future never possessed. (Chapters 194, 196, 200–201)