Nightmare

Biodata

Feature	Information
Name	Nightmare (梦魇)
Species/Race	Dream domain / home of an Initial Player
Affiliation	Initial Players; controlled by a Nightmare Lord or Acting Nightmare Lord
Occupation/Role	Domain and stronghold in the Final Battlefield
Status	Active; may be conquered, assimilated, collided with, shattered, or annexed
First Appearance	781

Background / History

The Final Battlefield’s 64 Initial Players were originally players from Weird Eerie City who were forced into deep sleep when an eighth-tier Order modified the dungeon. Their respective “homes” are called Nightmares, while the Initial Players themselves are called Nightmare Lords by eerie beings. 781 890

A Nightmare is constructed from its Initial Player’s Dream Core. Its environment, rules, and threats reflect what that person valued, feared, regretted, or experienced in reality, then distort those memories into an eerie scenario. Within their own Nightmare, Initial Players possess god-like control, but are unable to leave freely. 783 815 819

Players can turn a Nightmare into a faction stronghold through Authority Assimilation. Once its Initial Player is assimilated, the domain becomes aligned with the conquering side; the player controlling it becomes an Acting Nightmare Lord, while the original lord enters dormancy. 783 901

Domain Properties

Dream Core and Themes

Every Nightmare has a theme that determines its setting, gameplay, and hazards.

• The District 13 Nightmare is a large-scale domain themed Primal Blood. 784
• District 15’s Nightmare, Blood Night Opera House, manifests an Initial Player’s attachment to ballet and stage performance. 815 837
• Dream Core Ghouls arise from the Initial Player’s memories, emotions, trauma, or buried thoughts. 815 819
• Nightmare rules need not follow ordinary logic; a real-life tragedy may be transformed into an arbitrary but lethal rule or ghoul. 819
• Nightmare interiors can differ drastically even from other domains, including their item rules, marks, and death conditions. 817

Nightmare Lord Authority

Within a Nightmare, its lord or Acting Nightmare Lord can command the domain’s Dream Core Order and its native ghouls.

• Initial Players are effectively gods inside their own domains, able to shape and decorate them as they wish. 783
• Entering a Nightmare places players under rules dictated by its Nightmare Lord. 781
• An assimilated Nightmare can serve as a safe house and a captured stronghold for its faction. 783
• Normally, a player who assimilates a Nightmare can mobilize only one type of ghoul within it. 837
• Luo Xixi became an exception after consuming District 15’s Initial Player, gaining command over all Dream Core Ghouls in that domain. 837

Assimilation and Control

Authority Assimilation is used to capture a Nightmare by converting its Initial Player into an ally.

• Touching an Initial Player while Authority Assimilation is active can convert both the Initial Player and their Nightmare to the user’s faction. 783
• If a player dies in an enemy-assimilated Nightmare, their codename is transferred to the opposing faction. 783
• Following conquest, the original Nightmare Lord usually sleeps until the Acting Nightmare Lord relinquishes control. 901
• District 5’s Initial Player sleeps inside an egg; destroying or awakening such a dormant lord can create a potential escape route. 901

Collisions and Fragmentation

Nightmares can collide, merge, invade one another, and fracture into contested territory.

• A collision can merge two domains into a larger, unpredictable Nightmare. 815
• Collisions create rifts and cracks through which domains, ghouls, and players can cross. 838
• At least three simultaneous Nightmare collisions may be needed to shatter a large-scale Nightmare. 843 877
• Shattering a large domain creates fragments that are harder for its controller to manage and easier for invaders to annex. 843
• District 13 was shattered when three outside Nightmares invaded it, splitting its territory into pieces. 838

Known Nightmares

District	Name / Theme	Known Characteristics
District 1	Unnamed	Invisible domain spanning the entire Tianyuan coordinate; intruders fall asleep without realizing they have entered. Its Initial Player stitches intruders’ dreams together, lures them into using exclusive talents, consumes those talents, and erases the victims. 889
District 5	Unnamed	Forces entrants to communicate with its Initial Player and adapt to an alternate self. Success grants control as Acting Nightmare Lord; failure allows the alternate self to possess the entrant’s body. 864
District 13	Primal Blood	A large-scale Nightmare whose privilege space disables special abilities and strips Eerie Items layer by layer toward their pre-death forms. 784 843
District 15	Blood Night Opera House	Opera-and-ballet-themed Nightmare containing high-tier Dream Core Ghouls, including the Tier 10 Burning Death Eerie and the conceptual Orchestra Ghoul. 815 837

Story Role / Major Arcs

Final Battlefield Establishment

Nightmares form the central territory system of the Final Battlefield. Black and White Chess Players compete to conquer, assimilate, and use them as strongholds against one another. 781 783

District 13: Primal Blood

Ji Yan, Kong Yi, and Zuo Yang are ordered to conquer District 13’s large-scale Nightmare. Its scale makes it a valuable target but also attracts enemy Chess Players and raises the risk of domain collisions. 784

District 15: Blood Night Opera House

District 15’s Nightmare reveals how Dream Cores reshape a person’s real-life regret into a lethal dream environment. Luo Xixi later exploits a hidden operation to consume its Initial Player and assume full Nightmare Lord authority. 815 837

District 5 and District 1 Conflict

Eerie Ji Yan takes control of District 5’s Nightmare and uses its Dream Core Order to manipulate players’ eerie sides. District 5 later collides with District 1, whose Initial Player traps intruders in a dream world and feeds on their exclusive talents. 877 889 896

Nightmare Shattering War

As the conflict escalates, multiple Nightmares collide across the Final Battlefield. District 13 is fractured by three invading domains, demonstrating that even a large-scale Nightmare can be destroyed through coordinated collision and annexation. 838 843