Shadow World

Biodata

Origin and Purpose

The Shadow World was created by the gods after they divided the real world into multiple parallel realms. It records historical turning points from those worlds and sends compatible living beings into projections of those events. 426

Its stated purpose is cross-world learning: challengers can experience other histories, reflect on their failures, and potentially avoid repeating tragedies in their own worlds. The real world and Shadow World are described as interconnected “like substance and shadow.” 426

Dekan later confirms that Shadow Worlds and Magic Cards are inseparable in origin. In the historical era he investigates, Void Gates began appearing twenty-four years after the Holy Kingdom and Demon Realm war ended; the resulting need to conquer them drove both sides to research Magic Cards and share intelligence. 387

Access and Matching

Void Gates

• Shadow Worlds are entered through Void Gates, including stable national interfaces and unstable gates that may appear elsewhere. 13 384
• The Norton Kingdom possesses three Shadow World interfaces, including one secured within Havenlit Magic Academy by barriers and kingdom knights. 13
• A stable Gate automatically matches entrants with a suitable existing Shadow World; matching also occurs across ports worldwide. 13
• Temporary Void Gates may appear when a party and a Shadow World strongly resonate with one another, particularly when the selected challengers have significant connections or shared fate. 319
• A Shadow World may reject specific entrants. Mie and Clay were expelled from the gate leading to Legend of Undying Echoes, leaving Dekan as its only accepted challenger. 384

Entry Restrictions

• Ordinary weapons, clothing, and magic items cannot be brought into a Shadow World. Only Magic Cards bound to a challenger’s soul may enter. 3 387
• Shadow Worlds may alter a challenger’s clothing, appearance, race, identity, or starting position to fit the scenario. 14 74 223 320
• Mission prompts are visible only to recognized Shadow World Challengers. 14
• The Shadow World Spectator Program can relay real-time footage from a challenge to outside observers, allowing institutions to gather intelligence. 13

Challenge Rules

• Every world provides mission objectives and a time limit; later objectives may remain hidden until unlocked through exploration or information exchange. 153 384
• Story-type worlds can penalize challengers who recklessly harm natives or severely reduce local favorability, potentially causing mission failure and “unimaginable consequences.” 153 384
• The system generally constrains enemy strength so challengers are not placed in an immediate dead end; boss strength can usually be estimated from the world’s rank. 120
• If challengers cannot complete a world, surviving until the time limit expires can return them to reality. 120
• Failure—or allowing an unchallenged world to close—triggers a natural disaster in the real world. The danger rises sharply with the world’s rank. 13 387
• Shadow Worlds can overlap when their map locations and timelines align, allowing entities from a higher-difficulty world to intrude into another scenario. 176

Ranks and Threat Level

Settlement and Rewards

• After a clearance, challengers are moved to a liminal settlement space between the Shadow World and reality for evaluation. 184 356
• Evaluations record accomplishments, assign grades, and may use either team or individual settlement methods. 184 356
• Rewards can include materials, naturally formed Magic Cards, rank increases, Epic cards, and team synergy traits. 40 184 291
• High coordination can produce specialized team traits. Dekan, Cornelia, and Demi received a synergy reward after clearing Secret Tale of the Withered Sacred Rite. 184
• The energy of a Shadow World can become either calamity or “miraculous power,” depending on how challengers bring its story to life. 406

Documented Shadow Worlds

Selection Behavior and Irregularities

• Challenger identities may be selected according to perceived intent. Dekan hypnotized himself into believing he was a world-destroying calamity, causing the system to designate him a Rebel Challenger. 84
• The system’s party selection can favor challengers with pre-existing personal, real-world, or fate-based connections. 272 319
• Dekan’s team was repeatedly matched above its apparent rank, leading Professor Arnold to note that their party was effectively being treated as suitable for sixth-tier worlds despite Dekan and Cornelia both being fourth tier. 185
• Several Shadow Worlds connected to the Holy Kingdom and Demon Realm are not isolated settings; Dekan concludes they represent sequential segments of the same world’s history. 179 288
• The final Holy Kingdom–Demon Realm Shadow World explicitly closes that series, stating that no later worlds in the sequence will open. 384

Associated Entities

• Void Gates — Physical interfaces through which challengers access Shadow Worlds; they perform matching and may remain after a world’s clearance to process rewards. 13 406
• Amen / “Siemens” — A mutated Void Gate captured by Dekan from a ninth-rank Shadow World. It cannot reveal information about the Shadow World core, but can transmit directives when isolated. 408
• Magic Cards — The only ordinary combat tools that can accompany challengers into Shadow Worlds; their technology originated from Shadow World-derived materials and reverse engineering. 3 387
• Central Hub — The inaccessible core governing all Shadow Worlds. Dekan concludes that no living being, including gods, can invade or seize control of it. 428
• Chaos Gods — The Shadow World’s existence is tied to their authority, while the tenth-rank worlds are connected to their larger game. 387 426