Full health is the kill threshold, no matter if you're a god or a demon!

The cave walls were covered with crystal clusters of various colors—deep blue arcane crystals, milky white moonstone, dark red blood marrow ore, and shimmering star-like void meteorite iron… Some crystal clusters even grew together, forming a magnificent and bizarre symbiosis.

The ground was rough rock, paved with rusty tracks and overturned mine carts.

Some autonomous mining golems (Lv.63-64) are still futilely digging at the long-depleted ore veins, showing no reaction to the intruders.

However, in some areas, the minerals seem to have undergone mutations, with unstable energy fields surrounding the crystal clusters, or energy creatures that feed on the minerals.

"It's a mineral layer!" The eyes of several players in the team who had studied mining immediately lit up.

While the building materials on the first and second floors are certainly good, these high-purity, high-energy rare minerals are the hard currency for crafting top-tier equipment, performing advanced engineering, and enchanting!

"No wonder Arachne was able to support such a massive experiment; this floating city is actually connected to such a rich complex mineral vein!" Jiang Yi exclaimed.

"Could it be that the city was originally built by directly selecting the mineral veins and mountains?"

Wu Zhan made a decisive decision: "The planned exploration time may need to be extended. All those trained in mining, immediately begin mining in the safe zone! Combat teams, disperse and protect, clearing out any threatening energy creatures and mutated crystal cluster guards! Be careful not to touch any mineral deposits that appear extremely unstable and may cause energy disturbances!"

The team broke up into smaller groups again.

The miners took out their pickaxes and excitedly rushed towards the various crystal clusters.

The clanging and banging sounds began to echo through the mine.

A battle ensued.

Some Crystallized Devouring Worms (Lv.63) emerged from the crystal gaps and attacked the miners; some large crystal clusters were alarmed and activated into Berserk Cluster Guardians (Lv.65 Elite), firing energy rays and crystal explosion fragments; even in some energy accumulation areas, small Elemental Aberrations (Lv.64) formed.

The monsters here weren't very strong, so he started exploring on his own. He had a feeling that Arachne's diary fragments should be on every floor, so he decided to look for them.

However, there were very few buildings on this floor, and there were no laboratories here, only the occasional chambers in the mine, which were empty. Liu Nian wandered around for a long time and even found the entrance to the fourth underground floor, but still found nothing.

As a result, after Yun Xiangrong and the others killed a [Pulse Crystal Devouring Beast (Lv.66 Leader)], the third page was revealed.

[Arachne's Diary (Page 3)]:

> ...The responses are becoming clearer. They are not inanimate objects; they are 'breathing,' they are 'whispering.' I tried guiding them with arcane resonance, and the effect was remarkable... They seem to 'remember' me.

> ...Today I tried 'Earth Vein Conduit'. Directing the mineral vein energy directly into the cultivation pool increased the activity of the flesh and blood tissue by 400%! But they're also starting to exhibit mineral characteristics... Crystallized flesh and blood, interesting. Perhaps this is a new path? An immortal body, possessing both the vitality of flesh and blood and the resilience of minerals...

> …Mentor Morris was right, there is something deep within the vein. My floating city isn't just suspended; it's forging some profound connection with the earth. This connection wasn't designed by me; it's more like…being summoned. Sometimes, I can 'hear' vague thoughts through this connection, ancient, chaotic, filled with ineffable knowledge…and madness. I must be more careful.

The contents of the diary made Liu Nian frown.

Arachne seems a bit off, acting strangely.

Based on the contents of her diary, it seems that the fall of the floating city was related to something that triggered it.

The ore still needed to be mined for a while. The monsters on this level had been basically cleared out, so Wu Zhan ordered all the miners to stay here and continue mining, while the others went to the next level.

The passage leading to the next floor was found by Liu Nian; it was an elevator.

The elevator slowly descended, bringing everyone into a space filled with a faint, magical fragrance.

The fourth floor is entirely man-made. As far as the eye can see, there are rows of floor-to-ceiling metal filing racks, on which countless scrolls, crystal plates, and metal foils are neatly arranged. Some areas display miniature architectural models, while others display complex mechanical structural diagrams.

There were no living beings here, only some tiny, harmless (Lv.1) constructs that served for self-cleaning and archiving, moving slowly. The air was filled with faint fluctuations of preservation magic and dust-proof barriers.

"Holy crap... Is this the city lord's library?!" Jiang Yi's voice trembled with excitement.

"Quick! Everyone spread out and look for what's there!" Wu Zhan couldn't hide his excitement.

The group immediately began browsing the books. Excluding books on art, history, languages, and local customs, they mainly looked for architectural drawings, design plans, and books on life, careers, and skills.

The book categories here are extremely detailed:

Infrastructure: High-efficiency farms, automated mines, advanced stonemason/carpenter/blacksmith workshops, magical water treatment plants, waste disposal systems, residential area planning schemes...

Defensive structures: Multi-Enchanted Wall, Elemental Defense Towers (Fire, Ice, Lightning, Arcane), Anti-Air Ballista, Basic Energy Barrier Generator, Trap Workshop...

Military buildings: Standardized barracks, knight stables, mage towers, archer platforms, war workshops, armories...

Special buildings: Teleportation array research lab, weather control tower, public magic training ground, arena, opera house...

Production and R&D: Alchemy Lab, Enchanting Workshop, Inscription Hall, Engineering Workshop, Construct Assembly Line, Flesh and Blood Cultivation Chamber, Energy Research Station...

"I've got it! Holy crap, it's all stuff I can use to build Dragon City!"

"Move away! Move them all away! Leave no one behind!" Wu Zhan trembled with excitement.

While collecting blueprints, Yelena found the fourth page of her diary on a secluded file shelf labeled "Discarded Concept - Related to Immortality".

It was sandwiched inside a proposal titled "Feasibility Study on Soul Cage and Consciousness Backup".

[Arachne's Diary (Page 4)]:

> ...Everything I have built is ultimately to contain "me", to become an extension of "me".

> ...The initial test of the honeycomb network was successful. Three thousand seven hundred slave laborers share three 'node consciousnesses'. Efficiency has improved significantly, but creativity is almost zero. Not enough; this is far from the 'collective ascension' I desire. I need stronger individual consciousnesses as nodes, perhaps even... dispersing my own consciousness outwards and then integrating it back?

> ...The floating city's transformation is 73% complete. The 'Heart of the Web' will be key. It will weave together my consciousness, the fortress's energy network, the resonance of the ley lines, and the hive mind of those humble servants. At that time, I will no longer be confined to this frail body; I will be this city, this ley line, this all-encompassing 'web'!

The diary entries grew increasingly frenzied, revealing Arachne's ultimate ambition—she not only wanted immortality for herself, but also to make the entire floating city, and even the connected ley lines, a part of her expanded consciousness, into a vast, living city.