Beastrein

Beastrein is the lion-headed demon who operates humanity's Tower of Nightmares and tries to turn Jaehwan into a profitable Product. His apparent destruction instead binds him to Solitary Unbowed, transforming an exploitative Game Master into the sword's reluctant voice and Jaehwan's longest-lasting companion.

Biography

The Game Master and the last Walker

Beastrein appears after Jaehwan completes the Tower's Tutorial, formally introducing himself as its Game Master and offering to restart the Main Game with Jaehwan's memories intact. He explains that the apparent regressions were dreams induced by Dream Demon Stones, that Earth remains alive, and that only about a month has passed outside. To Beastrein, humanity's ordeal is an experience manufactured for observers and buyers; Jaehwan is an unusually valuable Product whose refusal threatens the profitable conclusion he expected from his antique Tower. Jaehwan rejects the offer and repeatedly challenges him instead, turning their confrontation into an extended attempt to understand the system behind the Tutorial. (Chapters 3–5)

Beastrein initially refuses those challenges because damaging Jaehwan's soul could bring punishment from the Lords who purchase cultivated Products. As Jaehwan persists, Beastrein becomes an unwilling sparring partner and a selective source of information about 《Chaos》, Adaptation, cultivation, and the Lords. He presents himself as a traveled, sophisticated demon—the rank 8,152 “Gentleman of Mockery,” with three Molts and experience across 128 worlds—but his ambition is practical and fearful: enough service and profit might win permission for another Molt and eventually elevate him from a disposable cultivator into a god. He conceals the harvesting system underlying the Tower while supplying just enough truth to make Jaehwan's departure useful to him. (Chapters 5–8)

When persuasion fails, Beastrein uses the Tower's control to bind Jaehwan with Black Iron Wood and plans to wait for the Tutorial's automatic end. Jaehwan reveals that 「Doubt」 has let him read the Tower's messages and understand Beastrein's plan, forcing the demon to synchronize with most of his true body. Beastrein's experience and black power overwhelm Jaehwan until the human Awakens and severs the Link joining Beastrein's body and soul. Jaehwan then breaks through the Tower's ceiling. Beastrein seems condemned to disappear with the collapsing world, but his soul has already become lodged in the Ice Dragon Sword that evolves into Solitary Unbowed. (Chapters 9–10)

An unseen legacy across the Great Lands

For much of Jaehwan's journey through 《Chaos》 and the Abyss, Beastrein survives only as an apparent memory and as the source of incomplete lessons. Jaehwan compares later forms of matter control to the smaller-scale authority Beastrein exercised inside the Tower, recognizes Little Brother-style communications in the Metaverse, and eventually learns why the demon had been so fixated on cultivation. Accumulated service could allow an official Cultivator to petition 《Big Brother》 for independence and godhood, reframing Beastrein's boasting as the strategy of a weak subordinate trying to escape the Lords without openly rebelling against their system. (Chapters 67, 89, and 108)

Beastrein's claims also become propositions that Jaehwan tests against wider worlds. His insistence that true time reversal is impossible provides a baseline for understanding that Eoduksi's Time Rewind restores only a limited arrangement rather than returning the universe to its past. More materially, footage from Beastrein's cultivation operation reaches the Great Lords: Jerome later says that he first saw Jaehwan through Beastrein's record. Even while his continued consciousness remains undisclosed, the former Game Master's activities therefore shape Jaehwan's knowledge, reputation, and enemies far beyond the destroyed Tower. (Chapters 158 and 218)

The voice within Solitary Unbowed

In the temporal rift, the blackened Solitary Unbowed unexpectedly speaks and identifies its voice as Beastrein. Jaehwan had suspected that the sword's evolution after the Tower's destruction involved a higher-species soul, but Beastrein confirms that he coiled inside the Ice Dragon Sword before it became Solitary Unbowed and subsequently accompanied every battle. The role exposes him to repeated chipping and breakage, yet it also lets a demon once oppressed by Lords participate in killing them. Beastrein takes particular satisfaction in Jerome's death, even as he complains that Jaehwan has ruined the comfortable divine future he had pursued. (Chapter 239)

The sword's repeated Great Evolutions and accumulated World Power eventually produce a mouth capable of devouring and speech. Beastrein says he delayed revealing himself because he feared Jaehwan would break the weapon, then lost the opportunity during the fifty years of darkness. Once exposed, he resumes his familiar mixture of information, mockery, and self-preservation: he explains that official Cultivators work for 《Big Brother》 through Little Brother and urges Jaehwan to retreat partly because the sword may not survive. Jaehwan answers that confinement in battered metal has repaid some of Beastrein's crimes, while acknowledging that their long shared journey has not been entirely miserable. (Chapter 239)

As time inside the rift stretches through hundreds of thousands of years, the old division between Cultivator and Product loses its immediate meaning. Beastrein argues, complains, repeats jokes, and supplies facts while Jaehwan continues to stab at an apparently unchanging universe. His presence cannot solve Jaehwan's isolation, but it gives that isolation another voice. At roughly a million years, even the demon reaches his limit and enters Dormancy, asking to be awakened after Jaehwan has endured another hundred thousand thoughts of death. Jaehwan must continue without active conversation, carrying the sleeping spirit in the same weapon. (Chapters 239–241)

The sealed companion in a revised world

When Jaehwan reaches the revised ending of his story, the broken Solitary Unbowed is again at his waist. The sword cannot speak yet, but it hums and is explicitly the same weapon that endured ten billion years with him. Beastrein remains sealed inside it as a demonic species, so the revision does not simply replace the companion with an ordinary sword. His latest state is presence without accessible speech: contained in the weapon and carried by Jaehwan, but unable to explain what awareness or memory has survived. (Chapter 266)

That return preserves the outcome of Beastrein's transformation without establishing more than the scene reveals. The Tower's Game Master is no longer directing humanity's nightmare or bargaining over Jaehwan as a Product; he exists within the weapon created through Jaehwan's refusal of that system. The familiar hum restores their material bond, while the absence of speech leaves their personal relationship unresolved. Beastrein's endurance is certain, but whether he can awaken, converse, or remember their immeasurable time together remains unknown at the close of the supplied corpus. (Chapter 266)

Appearance and personality

Beastrein first appears as a lion-headed demon in a black human suit, with a tiny top hat nestled among his mane. He bows formally and performs the role of a theatrical host even while discussing humanity as merchandise. After his physical defeat, his visible presence shifts to Solitary Unbowed: the darkened sword develops a mouth through repeated evolutions, allowing the sealed demon to devour and speak without recovering an independent body. (Chapters 3 and 239)

Smug, verbose, and fascinated by despair, Beastrein treats the Tower as entertainment and business. His courtesy conceals contempt for its inhabitants, while his selective honesty lets him pose as a teacher without exposing the whole cultivation economy. He is also greedy and conspicuously self-protective. His dream of godhood offers advancement without confronting the system that exploits him, and his warnings in the rift are partly driven by fear that Jaehwan will destroy the sword containing him. Long companionship softens the antagonism enough for jokes and conversation, but he never concedes that Jaehwan was right to reject the Main Game. (Chapters 3–8 and 239)

Powers and limitations

Molts and true-body synchronization

Beastrein has completed three Molts, placing his direct combat body at roughly the level of a third-stage Adapter. By synchronizing the Tower avatar with about eighty percent of that body, he manifests a gigantic claw and black power, combining greater strength with centuries of combat experience. The synchronization initially overwhelms Jaehwan, but it depends on the Link connecting Beastrein's body and soul. Jaehwan's Awakening identifies and severs that Pineal connection, leaving the soul stranded rather than defeating an unrestricted true body in ordinary combat. (Chapters 5 and 9–10)

Tower authority and cultivation

As Game Master, Beastrein can create projections, inspect records, communicate through Little Brother, manipulate matter within the Tower, alter its internal time ratio, and restrain a participant with Black Iron Wood. These powers belong to his administrative position and the Tower's mechanisms rather than an unlimited personal reality-warping ability. The first-generation Tower has obsolete controls: Beastrein needs a Product's consent to begin the desired conclusion, the completed Tutorial ends automatically after one hundred days, and killing a valuable Product risks punishment from the Lords. His drunken decision to maximize the time ratio also gives Jaehwan decades of subjective training that ultimately work against him. (Chapters 3–9 and 67)

Beastrein's Cultivator status grants knowledge and institutional access rather than freedom. He acquired permission through 《Big Brother》, operates through Little Brother, and cultivates souls for the Lords in exchange for service toward greater rank, another Molt, and possible godhood. Later evidence establishes that official Cultivators are subcontractors whose accumulated karma can support a request for independence. Nothing in the supplied chapters shows that Beastrein ever receives that promotion; his plan ends when Jaehwan destroys the Tower and severs the Link on which the operation depends. (Chapters 6–8, 89, and 239)

Existence within Solitary Unbowed

Beastrein's higher-species soul survives by lodging within Solitary Unbowed. The sword's accumulated World Power drives repeated Great Evolutions, eventually producing a mouth through which he can eat and speak, but Beastrein does not independently control a separate body. His condition is tied to the weapon's survival: he feels its damage, fears that Jaehwan may break it, and becomes unable to accompany him conversationally when Dormancy begins. In the latest scene he remains sealed inside the returned sword, which can only hum. The corpus does not explain the sealing mechanism or establish when speech will return. (Chapters 239–241 and 266)

Power progression

Relationships

• Jaehwan: Beastrein begins as Jaehwan's captor, intended seller, and unwilling combat instructor. After Jaehwan severs his Link, he unknowingly becomes part of Jaehwan's sword and shares every later battle. Their hostility develops into quarrelsome companionship during the rift, although neither forgets the exploitation that began it.

• The Lords and 《Big Brother》: Beastrein serves a hierarchy he resents but does not initially challenge. Fear of punishment keeps him from destroying a valuable Product, while the prospect of official cultivation and eventual godhood keeps him supplying souls. As Solitary Unbowed's voice, he relishes helping kill Lords whose system once left him powerless.

• Mulack Armelt: Beastrein operates an old first-generation Tower made by Mulack. The artifact's age explains important control limitations, but the supplied chapters do not establish a personal meeting or working relationship between the demon and its creator.

• Jerome: Beastrein's cultivation footage first exposes Jaehwan to the Great Lord. Much later, while sealed in the sword that helps kill Jerome, Beastrein experiences a form of revenge against the class of rulers he had once been forced to serve.

Items

• Solitary Unbowed: Beastrein's soul enters the Ice Dragon Sword before its evolution into Solitary Unbowed. He remains sealed through its growth, speaks through the mouth produced by Great Evolution, and experiences its battles and damage. In the latest scene the broken sword has returned but can only hum, leaving Beastrein present yet unable to converse. (Chapters 239–241 and 266)

• Tower of Nightmares: Beastrein purchases and operates “Tower No. 2,” an antique first-generation Tower made by Mulack. It is a giant Dream Demon Stone that supplies his Game Master controls, holds humanity's Tutorial, and collapses after Jaehwan breaks through its ceiling. (Chapters 3–10)