Dream Demon

Biodata

Feature	Details
Name	Dream Demon (梦魔)
Alias(es)	Nightmare Demon
Species/Race	Anomalous entity associated with the Dream Demon World/Nightmare World
Affiliation	Nightmare World; certain Nightmare Demons are described as Favored Ones born of the World Matriarch 287
Occupation/Role	Source of Erosion, realm incursions, reality-warping phenomena, and cross-world corruption

Power Progression

State / Rank	Description
Reality Dream Demon	A Dream Demon intrusion that manifests at the boundary of reality and the Dream Demon World. It may form a Surface World before either advancing or being contained 145.
Demon Realm	A stalled invasion that has formed a stable anomalous domain. Demon Realms may possess rules, cores, and environmental logic distinct from reality 145 214.
Nightmare Realm / Desperate Realm	A composite Dream Demon created by overlapping Dream Demons, such as a Reality Dream Demon combined with a Demon Realm. It represents a more stable and dangerous large-scale manifestation 214.
Nightmare Demon	An exceptionally rare Favored One born of the World Matriarch. Such beings possess unusual authority in the Nightmare World and are said to exist to devour further worlds 287.
Fifth-Level Nightmare Demon Realm	A high-grade Nightmare Demon realm associated with Earth-Calamity-class entities; thirteen avatars of a single Earth-Calamity Warlock were each observed possessing one 387.
Earth-Calamity / Heavenly Disaster	Higher abyssal ranks explicitly placed above Nightmare Demons. These terms primarily describe advanced Warlocks and their realms rather than a universal developmental stage shared by every Dream Demon 323 366.
Natural-Disaster-Level Dream Demon Realm	A Demon Realm with sufficient rules and enhancement can enter the Natural Disaster level. Zhou Kai's Grey World reached the First-Level Natural Disaster Realm after its sixth enhancement 402.
Dream Demon World Embryo	A sufficiently developed composite realm may become the embryonic form of a new Dream Demon World. Grey World developed in this direction after its nine rules merged into the Grey World Law 376.
Awakened Dream Demon	The greater Dream Demon remains in an abnormal half-sleeping state. If it fully awakens and begins moving, its power is expected to erase the distinction between the Nightmare Abyss's layers and spread wherever its influence reaches 430.

Classification and Realms

Term	Definition
Reality Dream Demon	A Dream Demon phenomenon at the boundary between reality and the Dream Demon; its influence can spread into the real world.
Surface World	An invaded area that has not yet completely lost control to a Dream Demon 145.
Gap World / Demon Realm	An invasion that has stalled before spreading further; also called a Demon Realm 145.
Inner World / Dream Demon World	A completely eroded area pulled deep into the Dream Demon's domain, such as Soraka Town 145.
Spirit World	A special field accessed through Inspiration Vision rather than a higher or lower layer of reality; its scenery varies with the world in which it is entered 145.
Nightmare Realm / Desperate Realm	A composite Dream Demon formed by overlapping Dream Demons, potentially combining a Reality Dream Demon with a Demon Realm 214.
Physical-Type and Rule-Type Dream Demons	Earlier Dream Demon manifestations were predominantly physical-type entities. Rule-type Dream Demons later emerged and were associated with the first Demon Realms 214.
Artificial Dream Demon	A Dream Demon deliberately cultivated or deployed through artifacts, conflict, concentrated demonic miasma, or engineered nightmare conditions. Such entities remain rare in the Butterfly Dream World but are actively created in the Yin Sha World 334.
Nightmare Seed	A seed planted in another world by Nightmare Demons to establish a remote presence, explore the target world, and eventually produce Nightmare Demons that can be harvested or consumed 328.
Past Dream Demon	A Dream Demon located within the Dream Demon World rather than ordinary reality. Past Dream Demons can serve as transit points between worlds when accessed through their Dream Demon Walkers 392 393.
Black Mist Wall	A boundary surrounding certain Past Dream Demons and Dream Demon regions. It can be crossed by qualified walkers or specialized concealment methods, but normally separates a Past Dream Demon from the wider Dream Demon World 392 404.
Dream Demon World Embryo	The preliminary form of an independent Dream Demon World, created when a powerful realm develops sufficient rules, scale, and autonomy. Its emergence is dangerous enough to attract the Dream Demon World's suppression 376 427.
Grey World Law	The unified law of Zhou Kai's Grey World, formed when the Nine-Core Demon Realm's former rules merged. It can absorb Dream Demon Rules and recreate fragments as subordinate Dream Demons 376.
Fifth-Level Nightmare Demon Realm	A high-level realm classification possessed by the avatars of certain Earth-Calamity Warlocks 387.

Appearance

Dream Demons have no single fixed morphology. Their manifestations range from locations and environmental distortions to monsters, human impostors, and hidden cores.

• A looping subway train filled with Faceless Ones 140.
• A slug-like core concealed within the Line One subway manifestation 140.
• A Withered Shadow that repeatedly re-formed after being physically destroyed 158.
• A giant face known as Chef, sustained by a mask visible through Inspiration Vision 213 214.
• A Gold-Hosting Demon that used metal as a shell 144.
• A human-shaped core that replaced Dream Demon Walker Zhuang Xiaofei within his own team 158 159.
• The Jester and Owl Judge, dual cores concealed within the Bat-Owl Demon Realm 254.
• A Dream Demon Giant encountered by Zhou Kai after his return from the Dream Demon World 305.
• The Dream Demon itself manifested an opened eye amid the disturbance caused by the Grey World, affecting the wider Nightmare Abyss 375.
• The Men in the Mist, including a regional Progenitor, appeared as large-scale Dream Demon creatures in the Dream Demon World 399.
• The Shadow Crawler, also called Yaksibus, is an incomprehensibly powerful entity slumbering at the Bottom of the Dream Demon. Its gaze and shadow-thread manifestations can extend across the Nightmare Abyss 401 404 427.

Abilities and Characteristics

Erosion and Assimilation

Dream Demon power radiates Erosion that can damage bodies, destabilize minds, and alter living beings.

• Ordinary people exposed to Dream Demon radiation face severe consequences 212.
• Dream Demon Walkers may draw on Dream Demon power to strengthen or remodel themselves, but excessive use destabilizes them and overdrafts their future 171.
• Li Mingcheng's death resulted in his transformation into a Mirage, leaving only a Steel Pen behind after his body was destroyed 162.
• Dream Demon power can assimilate a person into a monster while preserving only obsession and amplified extreme emotions 215.
• The Pseudo-Human body is composed of Dream Demon power and suffers far less contamination than Zhou Kai's flesh-and-blood body 216.
• A Pseudo-Human body continuously emits radiation in reality; ordinary people who approach it can lose years of their lives 224.
• Eroded Scar abilities can produce Dream Demon-derived entities, as seen when Malkor's Gate of Shadows created enhanced shadow demons 313 314.
• Dream Demon martial power carries innate corruption, erosion, and mutation effects, though Zhou Kai demonstrated that opposing bloodline and spirit-flesh powers can partially suppress or purify such contamination 346 350.
• Even Dream Demon Walkers who do not intend harm can become vulnerabilities through which Dream Demon influence and hostile warlocks enter their home worlds 406 407.

Realm Creation and Environmental Control

Dream Demons can reshape locations into hostile domains governed by their own environment and logic.

• A fully eroded area becomes an Inner World, while incomplete incursions may form Surface Worlds or Demon Realms 145.
• The Experimental Middle School Dream Demon twisted school routines into killing rules and divided its inhabitants into Inferior Students and Honor Students 206.
• After a residential-complex invasion ended, the physical buildings rapidly decayed and collapsed while the true complex was absorbed into the Dream Demon World 159.
• Time in the Dream Demon World can pass far faster than in reality; more than a dozen dream-hours may equal only dozens of real-world minutes 197.
• A Dream Demon realm can trap targets behind a sturdy Sky Curtain that conventional attacks cannot breach 188.
• In the Experimental Middle School realm, Staff Badges represent status and authority recognized by the Dream Demon. Monsters stripped of their badges lose the qualifications and power granted by their roles 209.
• A Demon Realm's energy output is limited by flow rate rather than total reserves; within the authority permitted by the Dream Demon, a Warlock can continuously draw upon its power 376.
• A powerful realm can develop into an embryonic Dream Demon World. Grey World became a nightmare continent governed by the Grey World Law after the Nine-Core Demon Realm's transformation 376.
• The Dream Demon Gourd-Heaven Formation can automatically detect newborn Dream Demons across multiple worlds and use the Great Dream Treasure Vase to package and remove them 403.

Cognition Manipulation

Some Dream Demons and their items can alter perception, memory, and identity.

• Zhuang Xiaofei's replacement used a Student ID to occupy his place in the team, causing Jin En and the others to accept the impostor as normal despite its abnormal behavior 159.
• The same identity-replacement effect layered cognitive manipulation with the Dream Demon's internal rules 159.
• A Reality Dream Demon incident caused victims to lose track of their own thoughts before they could recognize what had been altered 159.
• The Accuser's Mask can frame targets through Dream Demon rule effects, manipulating how the realm assigns blame and punishment 215.
• Nightmare Viruses can corrupt virtual-world data and generate Dream Demons in digital environments, potentially erasing victims' accounts and existence at the root 380.
• Nightmare influence can induce dreams or sleep in Dream Demon Walkers on a massive scale, opening pathways between the Dream Demon World and an invaded world 407.
• Certain high-level Dream Demon entities can manipulate perception on a conceptual scale; Mingzhen's confrontation with Fang Yue and Yaksibus was revealed to have unfolded within an illusionary dream 431.

Cores, Sustenance, and Regeneration

A Dream Demon Core functions as a critical anchor for many manifestations and realms.

• Zhou Kai identified Zhuang Xiaofei as the hidden core of a Reality Dream Demon through Inspiration Vision; killing him ended the invasion 158 159.
• The Withered Shadow could not be permanently destroyed in the physical environment because its corresponding entity existed in the Spirit World 158.
• The Cafeteria's giant face continued to regenerate after losing its Staff Badge because a mask sustained its existence and drew on surrounding Dream Demon power 214.
• Destroying that mask collapsed the Cafeteria area and severed its energy relay point 214.
• Nightmare Realm cores ordinarily revive after being killed, though the Rat-Skull Man and Puppeteer were observed to be permanently destroyed under abnormal circumstances 250.
• The Jester and Owl Judge served as the two cores of the Bat-Owl Demon Realm; Zhou Kai destroyed both and absorbed their power 254.
• Warlocks can refine their own realms by devouring Dream Demon cores whose rules match their foundational rule, avoiding the impurities created by indiscriminately consuming dreams 326.
• Destroying the Blood Moon Bronze Mirror linked to Ghost Eye severely damaged its Demon Realm and delayed the revivals of Ghost Eye and Blood Shadow for at least a year 320.
• Demon Realm Rules are extensions of the Dream Demon World. Forced extraction, fusion, or conversion of these rules incurs escalating costs and risks attracting the Dream Demon's attention 320.

Propagation and Cross-World Invasion

Dream Demons can be naturally formed, artificially induced, or spread beyond their original worlds.

• Nightmare Demons can plant Nightmare Seeds in other worlds, use them to remotely investigate those worlds, and later consume the Nightmare Demons born from the seeds 328.
• The Wind-Fire Way deliberately generates unrest, warfare, and artificial nightmare dens to intensify demonic miasma and accelerate the Yin Sha World's decline 334.
• The Great Dream Treasure Vase can be used to deploy artificial Dream Demons against selected targets, including powerful clans and densely populated cities 334.
• A world producing Zoomorphic Martial Artists is described as having reached a late stage before destruction, after which Warlocks may plant Martial Sources and exploit the world's inhabitants as resources 326.
• Dream Demons are conceptual disasters rather than threats limited to physical life; abandoning flesh and existing as data does not prevent Dream Demon corruption 380.
• Nightmare Seeds can transmit copies of a Nightmare Demon's memories, powers, and cultivation path into a target world, allowing an implanted agent to grow a new body and identity over time 327.
• Time differentials can make seed-based infiltration highly efficient: a century of development in Yin Sha World required only around fifty days of waiting in the Nightmare Abyss 327.
• Past Dream Demons and their Walkers create bridges between reality and the Dream Demon World, allowing materials, people, and even Warlock avatars to pass between worlds 392 393.
• Heart Demon Calamity exploited Dream Demon Walkers within the True Martial World to open thousands of invasion routes for Momo Warlocks, bypassing the world's sealed exterior defenses 407.

Nightmare-World Authority

Dream Demons are tied to the vast Dream Demon World at the bottom of the Nightmare Abyss.

• The Dream Demon World is described as boundless, containing overlapping anomalous regions and fragments of worlds where ordinary time and distance lose meaning 304.
• Dream Demons may permit their Favored Ones to draw upon Dream Demon power, but unauthorized extraction can result in a mark and pursuit by Nightmares 304.
• Nightmare Demons are considered exceptionally rare within the Nightmare World; becoming one after the fact is described as nearly impossible 287.
• Those born as Nightmare Demons possess exceptional authority and are said to be created to devour additional worlds 287.
• The Bottom of the Dream Demon reacted when Zhou Kai's Nine-Core Demon Realm began forcibly absorbing additional Dream Demon power 374.
• The Dream Demon itself opened an eye during the resulting abyssal disturbance, suggesting that sufficiently significant realm changes can draw the attention of the greater Dream Demon source 375.
• The Grey World Law can host fragments of Dream Demon rules, causing those fragments to reappear as subordinate Dream Demons and raising the realm's energy-storage and release limits 377.
• Those attempting to escape the Nightmare Abyss face the Dream Demon's curse and obstruction; even Natural-Disaster Warlocks remain permanently connected to it 398.
• The Dream Demon may bargain with other supreme entities. It allowed Yaksibus to transform five Star Lords into Favored Ones in return for destroying the Dream Demon World Embryo and suppressing dangerous miracles 427.
• The Dream Demon is not yet fully awake. Its complete awakening would cause the distinction between the Dream Demon World, the Nightmare Abyss, and surrounding layers to collapse beneath its expanding influence 430.

Relationships and Associations

• Dream Demon Walkers: Walkers are infected or chosen individuals who enter Dream Demons and may use their power, items, and anchor points to survive. Prolonged involvement with an Initial Nightmare generally deepens that realm's malice toward its Walker 199.
• Dream Demon Items: Many items appearing within a Dream Demon can only be used by the specific infected subject or chosen individual recognized by that Dream Demon 139.
• Favored Ones: Nightmare Demons are Favored Ones born of the World Matriarch and can draw upon Dream Demon power within permitted limits 287 304.
• Nightmare Marks: Individuals who take Dream Demon power without authorization may be marked and relentlessly pursued by Nightmares while inside the Dream Demon World 304.
• Warlocks: Warlocks exploit Nightmare Realms as their foundational cultivation system. They plant Nightmare Seeds, harvest world resources, refine living beings into pills, and consume compatible Dream Demon rules to complete their realms 326 328 329.
• Artificial-Dream-Demon Cults: The Wind-Fire Way uses the Great Dream Treasure Vase and induced social disorder to create and deploy artificial Dream Demons in the Yin Sha World 334.
• Grey World: Zhou Kai's Earth-Calamity-stage realm can contain and reproduce fragments of Dream Demon rules as subordinate Dream Demons, potentially developing into a new Dream Demon World through further expansion 377.
• Star Lords: Fallen Star Lords accepted Dream Demon Erosion in exchange for the authority to wield seven key rules and an Abyss-bound form of immortality 397.
• Shadow Crawler / Yaksibus: This Bottom-of-the-Dream-Demon entity negotiated directly with the Dream Demon, received permission to turn five Star Lords into Favored Ones, and was tasked with eliminating the emerging Dream Demon World Embryo 427.
• Dream Demon World Embryo: The Dream Demon treats the birth of a potential rival Dream Demon World as a threat. Grey World's growth consequently drew both the Dream Demon's attention and Yaksibus's intervention 376 427.
• Survivor Civilizations: Nightmare Viruses and ordinary Dream Demon Erosion threaten even highly advanced data-based civilizations, requiring reality-based allies to periodically clear infections from virtual populations 379.

Documented Incidents

Incident	Manifestation	Outcome
Ferris Wheel Incident	An officially filed E-rank Dream Demon incident in Xishan City 139.	Recorded alongside the Faceless Man, Stitch Monster, and Iron Rat cases.
Line One Subway Dream Demon	An infinitely looping train populated by Faceless Ones; each carriage contained part of its power 140.	Zhou Kai weakened the Erosion by killing Faceless Ones, found the core, and escaped the train.
Residential Complex Reality Dream Demon	A realm containing an immortal Withered Shadow and a core disguised as Dream Demon Walker Zhuang Xiaofei 158.	Zhou Kai identified and killed the core, ending the invasion and causing the realm to retract 158 159.
Soraka Town	A fully eroded Inner World surrounded by the Wall of Black Mist and threatened by external Nightmare monsters 145 147.	Zhou Kai sought to stabilize it by creating controllable Dream Demon creations to balance invading monsters 148.
Experimental Middle School Dream Demon	A school-based composite realm with killing rules, Pseudo-Humans, Staff Badges, and several interconnected zones 204 206 214.	The Cafeteria section collapsed after its sustaining mask was destroyed. Zhou Kai later destroyed the Principal core, causing the realm to begin collapsing, while Haunted School remained under his practical control for later development 214 221 236.
Earth Owl Rat Dream Demon	A low-intensity Dream Demon source emerging from a sealed rat hole beneath Wanggang 186.	Its Earth Owl Rats remained trapped behind Grave Soil while attempting to gnaw through surrounding rock.
Subway Demon Realm Clearance	A deeper subway Demon Realm containing six core Mirages 174.	Zhou Kai destroyed all six cores, causing the Demon Realm to retreat 174.
Bat-Owl Demon Realm	A Demon Realm governed by the Jester and Owl Judge as its two cores 254.	Zhou Kai killed both cores and absorbed their power before returning to Gotham City 254.
Ghost Eye Demon Realm	A Demon Realm centered on Ghost Eye, whose cores later fused amid an attempted activation in Dachang City 314 321.	Zhou Kai destroyed the entrance and killed Ghost Eye after the fusion 321.
Peaceguard Prefecture Reality Dream Demon	A developing Reality Dream Demon that produced ghostly shadows and maintained a regenerating nightmare curtain 350.	Zhou Kai's storm power tore apart the curtain and suppressed the underdeveloped nightmare 350 351.
Yin Sha World Artificial Nightmare Deployments	The Wind-Fire Way used Great Dream Treasure Vases, demonic miasma, conflict, and targeted deployments to create artificial Dream Demons 334.	Zhou Kai destroyed the vase deployed at Mo Manor and recognized the broader campaign against major local families and cities 334.
Abyssal Eye Disturbance	The Bottom of the Dream Demon reacted to Zhou Kai's Nine-Core Demon Realm absorbing Dream Demon power, after which the Dream Demon itself opened an eye 374 375.	The disturbance disrupted the Nightmare Abyss and contributed to a collapse in the Breath-Flow Network that drew Pink Face Earth-Calamity's fleet toward its source 374 375.
Grey World Emergence	Zhou Kai's Nine-Core Demon Realm evolved into Grey World, an embryonic Dream Demon World governed by the Grey World Law 376.	The new realm's birth overloaded the Breath-Flow Network and became a source of concern to the Dream Demon World and surrounding Warlock powers 376 378.
Dream Demon World Hunt	Zhou Kai deliberately accepted a Nightmare Mark after rescuing Evelyn, drawing the Dream Demon Giant, Men in the Mist, and their Progenitor to him 399.	Zhou Kai destroyed the pursuing entities and escaped into a Past Dream Demon before an overwhelmingly dangerous presence annihilated the surrounding Dream Demon Lands 399.
True Martial World Walker Infiltration	Heart Demon Calamity used Dream Demon Walkers inside the True Martial World to create nearly ten thousand routes for invading Momo Warlocks 407.	The Martial Saints destroyed the world's surface, oceans, and core to annihilate the invaders and temporarily sever the connection to the Dream Demon World 407.
Shadow Crawler's Favored-One Conversion	The five Star Lords' Calamity Web inadvertently drew Yaksibus's attention through the Cursed Thorns 427.	The Dream Demon authorized Yaksibus to transform the Star Lords into shadow cocoons and future Favored Ones in exchange for suppressing the Dream Demon World Embryo and dangerous miracles 427.