Floating City

Biodata

Feature	Information
Name	Floating City (浮空城)
Alias(es)	Atlantia (Lin An's original blueprint); Netheril (the officially named supreme flagship) 55 473
Type	Magitech mobile city and war fortress operated through artificial ship-spirit/AI systems 201 366
Affiliation	Arcane Empire 201
Occupation/Role	Interstellar Ark, cross-universe forward base, strategic deterrent, and “Civilization Restarter” for Arcanist Civilization 55 128 201
Status	Active; the Empire fields multiple Floating Cities, though at least one Ninth-Tier unit was destroyed in a dimensional clash 370 469
First Appearance	55

Power Progression

Stage / Realm / Level	Chapter	Notes
Atlantia blueprint	55	Lin An’s original design: a Philosopher’s Stone-powered floating city with anti-gravity, defenses, research facilities, and interstellar teleportation capability.
Uranus Project completed	201	The first completed city receives dual Core Inscription systems, redundant energy sources, Void defenses, cross-universe travel functions, and industrial districts.
Second-generation specification	264	Lin An identifies requirements for adaptive size, anti-divination, improved Void Cannon targeting, soul/Gate of Truth links, and counters to Divine Kingdom Projections.
Version 3.0 development	354 359 380 381	A full rebuild incorporates new Void Energy knowledge, multidimensional energy systems, Divine Word Blessing, and magic engraving. Morgana judges the resulting city to have barely reached the Tenth-Tier weapon standard.
Void Law reconstruction proposal	459	A planned Self-Healing/Reconstruction system would use Void Law’s spacetime-reversal property to restore the city within seconds if its core Void spring remains active.
Netheril designation	473	Lin An formally names his supreme Tenth-Tier flagship Netheril, honoring the legendary origin of Floating City civilization.
Perfect Rune ascension project	514	Lin An proposes replacing Netheril’s systems with Primordial and Perfect Runes, turning it into a self-aware mechanical lifeform intended to pursue an eventual Eleventh-Tier ascension. This upgrade remains incomplete.

History

Conception and construction

Nicolas Flamel first revealed Lin An’s Floating City blueprint to Albus Dumbledore. The proposed city, called Atlantia, would use a giant Philosopher’s Stone as its core and function not merely as a settlement, but as an interstellar Ark able to carry wizarding civilization beyond its home world 55.

The concept became the Uranus Project. Its construction faced several major obstacles: Void Energy could corrode enchantments, Void Cannons consumed excessive energy, and large-scale rune-based alchemy struggled to reconcile incompatible enchantment systems. Lin An’s requirement for cross-universe travel made the project substantially more complex than an ordinary anti-gravity city 128.

Space Folding and Gravity Reversal runes sharply reduced the projected construction time. The completed Uranus Project entered service in Arcane Calendar 41, equipped as a self-sustaining fortress capable of preserving civilization if Earth and the Empire’s homeland were lost 180 201.

Early deployment and revision

The completed city departed Earth through the Void on the Arcane Empire’s second Multiverse expedition. With known coordinates and Void Engine travel, the voyage to its target universe took one year rather than the centuries previously expected for such journeys 219 220.

A battle with Jehovah exposed critical weaknesses: the Void Shield cracked under divine attack, large energy outputs disrupted internal enchantments, and the city had no reserve Void Energy for emergencies 257 264. Lin An responded by ordering a second-generation redesign focused on flexible size, concealed armaments, anti-divination, soul protection, and defenses against divine domains 264.

Fleet expansion and the Netheril flagship

Floating Cities became the Empire’s primary conventional strategic assets. By this period, only Lin An and Nicolas Flamel were known to possess the knowledge needed to perfectly build one; other master alchemists could at most produce cities capable of floating, not fully integrated war fortresses with infinite-energy matrices, cross-dimensional navigation, and god-resistant defenses 363.

The Empire later operated three Floating Cities. One was destroyed in a dimensional clash, while the remaining two guarded separate frontier sectors 469. Lin An’s personally forged Tenth-Tier city remained a concealed trump card, outwardly disguised as a stronger Ninth-Tier weapon until he chose to reveal it 469.

Lin An formally named this supreme flagship Netheril and began considering methods to push it beyond the Tenth Tier after learning that far stronger Void entities existed 473.

Appearance

A Floating City is a vast mechanical metropolis built for both habitation and war. Deployed units can be comparable in size to a small planet, with towering command spires, dense rune-covered metal construction, and spherical protective barriers 335 366.

• Central research-tower cluster — serves as the city’s intellectual and command center 201.
• Industrial districts — include Golem factories, cloning facilities, legion training camps, and fleet-construction zones 201.
• Civilian infrastructure — contains residential sectors and the Grand Library alongside military and research installations 201.
• Magic Gold dome — the physical outer defense against Void corrosion 201.
• Void Shield — conceptual shielding designed to defend against Void conditions and “Truth”-based threats 201.
• Command spire and core tower — houses command functions and, in at least one deployment, a Space-Time Crystal used for Void travel 219 366.

Systems

Mobility and dimensional travel

Floating Cities remain airborne through anti-gravity systems and can travel through the Void using faster-than-light and cross-universe mechanisms 201.

• The first Core Inscription system governs anti-gravity, environmental control, shields, energy distribution, weapons, and FTL travel 201.
• The second Core Inscription system is dedicated to the enchantments required for cross-universe travel 201.
• Void Engine travel allows the city to rupture reality’s barriers and enter the Void 219.
• Time Regulators are integrated into the framework to prevent the city from aging, regressing, or otherwise being distorted by the Void’s chaotic temporal currents 416.
• Lin An later develops a composite enchantment capable of shrinking an entire Floating City for Quantum Realm entry and emergency mobility 537.

Energy systems

The completed Uranus Project uses multiple power sources so that it does not become helpless in regions where ordinary magic is restricted 201.

• Primary source: Philosopher’s Stone 201.
• Secondary source: Artificial star paired with an Energy Conversion Enchantment that converts heat and magical power 201.
• Additional backups: Nuclear, electrical, tectonic, psychic, and Cosmic Energy systems 201.
• Aether Cores: The Tenth-Tier configuration requires at least three Aether Cores, or a substantially improved core, to sustain full operation 381.

Weapons

The Floating City combines technological, magical, spatial, and Void-based armaments 201 264.

• Technological weapons: High-energy lasers, electromagnetic railguns, nuclear bombs, orbital weapons, and gravity bombs 201.
• Magical weapons: Fiendfyre Cannons, time bombs, dimensional-collapse cannons, and Elemental Riot Cannons 201.
• Void Cannon: Its most destructive weapon, but Void Energy corrodes conventional containment materials. It also fires in a straight line, allowing sufficiently agile enemies to evade it 201 264.
• Photon Planet-Buster Cannon: A restricted version was used to strike Atlantis’s shield as a warning during the Pangu Project 189.
• Anti-Divinity Weapon: Lin An proposes equipping future Floating Cities with a weapon based on Nick’s body so ordinary Arcanists can participate in battles against gods 264.

Concealment and defense

Floating Cities can enter optical and law-based stealth modes, concealing their presence until the commander deactivates infiltration camouflage 366.

• A dual defense system combines a Magic Gold physical shell with the conceptual Void Shield 201.
• Anti-divination, anti-crisis-detection, invisible weaponry, and reduced energy signatures are planned for later versions to prevent powerful enemies from sensing incoming attacks 264.
• The city’s defenses are not absolute: Jehovah’s Divine Arts cracked the Void Shield within seconds, while later Void exposure left another city in near-total ruin 257 416.
• The planned Void Law reconstruction system would restore destroyed structures through a causal closed loop as long as the core Void spring remains lit 459.

Artificial intelligence and ship spirits

Floating Cities use artificial spirits to manage their immense systems.

• Morgana assists Lin An with diagnostics, simulations, navigation, energy optimization, repairs, and upgrade planning 264 381.
• Ariana is the artificial ship spirit of a Floating City commanded by Albus Dumbledore; he named her after his late sister to preserve his humanity 366.
• A city is described as having the structure of a powerful lifeform: a body, an energy core, and a consciousness supplied by artificial intelligence 264.

Internal Facilities

• Central research towers for magical and scientific development 201.
• Golem factories producing war machines 201.
• Cloning factories and legion training camps 201.
• Fleet-construction zones 201.
• Civilian residential districts and the Grand Library 201.
• Medical rooms and cultivation tanks capable of treating severely injured personnel 264.
• Reserve warehouses intended to hold divine-grade repair materials, though these can be lost if their storage dimensions are annihilated 416.

Strategic Role

The Floating City was built as the Arcane Empire’s ultimate continuity measure. If Earth were destroyed, its industrial systems, research facilities, population zones, and military production could preserve the spark of Arcanist Civilization and rebuild it elsewhere 201.

Its energy readings alone led the Galactic Federation to assess the relatively young Arcane Empire as a much more advanced interstellar civilization than its broader infrastructure suggested 219. Within the Empire, ownership of a Floating City becomes the ultimate aspiration for many Arcanists: a symbol of freedom to cross worlds, pursue knowledge, and seek Truth across the stars 363 395.

Lin An ultimately intends for Floating Cities to become standardized platforms rather than solely his personal weapon. Qualified Arcanists would use them for dimensional exploration, trade, resource acquisition, and warfare, subject to Imperial screening and taxation 264.

Relationships

• Lin An — Original designer, principal commander, and creator of the supreme flagship Netheril; considers the Floating City his true base and most reliable support in hostile universes 55 253 473.
• Nicolas Flamel — Co-creator of the Uranus Project’s cross-universe core and the only other known individual able to perfectly construct a Floating City 201 363.
• Rowena Ravenclaw — Leading Void Energy specialist; develops the Void Cannon and is essential to resolving its targeting and containment limitations 201 264.
• Morgana — Lin An’s AI assistant, responsible for simulations, repair coordination, system analysis, and the Floating City 2.0 design archive 264 381.
• Albus Dumbledore — Commands at least one deployed Floating City and personally orders its stealth mode deactivated during a frontier operation 366.
• Ariana — Artificial ship spirit serving Dumbledore’s Floating City 366.

Notable Quotes

“It isn't merely a city. It is an interstellar Ark.” — Nicolas Flamel 55

“Even if Earth was destroyed, even if the Empire's homeland fell, as long as this Floating City remained, the spark of Arcanist Civilization would never be extinguished.” 201