Li Tianran strode into the bronze gate.

From the outside, Sky Castle resembled a European castle from the 16th century, looking ancient and historically weighty, with no hint of technology.

But only by going inside could one discover its hidden wonders.

The entire Sky Castle was divided into three major departments based on functional capabilities.

Military Department, Scientific Research Department, and Living Department.

They were located in the lower, middle, and upper levels of Sky Castle, respectively!

As for the defensive works and communication base stations scattered throughout Sky Castle, they did not belong exclusively to any functional area, so they were not strictly divided.

The military area on the lowest level was located on the same level as the bronze gate Li Tianran entered.

"Particle railgun..."

"Ultrasonic weapons..."

"Aerospace fighters..."

Li Tianran walked through the military area on the first floor. Both sides of this majestic hall were filled with crystal screens. Countless weapon templates appeared on the screens, ranging from the most ancient stone knives to space weapons. It was like a weapon museum, recording the entire weapon development history of the Sky Apostle race from its birth to the present.

Li Tianran stopped in front of a certain area of ​​the crystal screen. On the screen in front of him, a pistol-like weapon was displayed quietly. He raised his head and pressed the "retrieve" command on the screen, but soon, a dazzling red light appeared on the screen, accompanied by a mechanical electronic sound.

"Weapon permissions have not been fully unlocked, please wait patiently..."

On the screen in front of Li Tianran, the crystal display screen showing the pistol protruded, and then returned to its original shape.

Behind this screen was the huge weapon warehouse of the Sky Apostle race. If permissions allowed, Li Tianran could directly obtain any weapon from this screen.

"I developed these weapons using scientific research technology, but I can't use them myself and need to wait for permission to be unlocked. It's really..." Li Tianran took a deep breath. He felt that this fact was too absurd and ridiculous!

When using his own things, he still needed to get permission from others?

Li Tianran didn't know who made this restriction, just like he didn't know why, when the level of civilization reached above level 0.9, a terrifying "Great Destruction" would befall this civilization.

This was like a rule in the dark. Even a powerful ancient civilization could not escape it, and could only find a glimmer of life within the rules.

Could it be that above the starry sky, there were higher-dimensional beings overlooking Blue Star?

Otherwise, how could this law, which absolutely did not exist on Blue Star, be explained?

Li Tianran thought about the endless and vast starry sky. In the vast universe, perhaps Blue Star was not the only planet with life. Blue Star might just be a breeding ground for higher-dimensional beings. They regarded the wars between civilizations as games, and the Great Destruction and some inexplicable rules were just some obstacles or fun deliberately added by those higher-dimensional beings in the game.

"This kind of thing is too far away from me." Li Tianran felt that his mind was in a trance for a moment, but he quickly woke up.

His biggest enemy now was still the ancient civilization. If there really were higher-dimensional beings watching everything on Blue Star, then the ancient civilization would definitely be the first to consider the consequences.

Among a group of rice paddies, the tallest one is definitely the most eye-catching.

And Li Tianran was afraid that only after completely defeating the ancient civilization would he be qualified to enter the sight of those higher-dimensional beings.

…

After passing through the military area, Li Tianran arrived at the Scientific Research Department.

The Scientific Research Department was divided into the Biotechnology Research Department and the Military Technology Research Department. The Biotechnology Research Department was very small, probably because the apostles felt that the secondary evolution was enough to make them immortal, so they did not continue to invest subsequent resources. Moreover, since several Great Destructions, some important biotechnology research resources had disappeared from Blue Star, making it extremely difficult to further develop this technology.

In addition, secondary evolved creatures already had the characteristics of self-healing and adapting to extremely short-term harsh living environments, so there was no need to study any medical technologies or drugs.

The Biotechnology Research Department was basically in a semi-abandoned state.

In contrast, the equipment in the Military and Communications Technology Research Department was very complete.

The apostles' civilization was one in which war was a catalyst for progress. They had been walking through the flames of war since their birth.

Their scientific research results in war were the most advanced!

Li Tianran found hundreds of new weapon designs in the research room, and most importantly, he also found a proposal for the "North Heavenly Gate" security network.

From the first day Li Tianran prepared to build the North Heavenly Gate, the ancient civilizations also established a hacker team specifically to break through the North Heavenly Gate!

However, the North Heavenly Gate had complete design drawings, so the research and development was extremely smooth, while the ancient civilizations' proposal was just an idea, and it might take at least two or three years to implement it.

However, the ancient civilizations' keen reaction to war still made Li Tianran extremely vigilant.

Leaving the Scientific Research Department and continuing upwards, the highest level was the Living Area, where the Sky Apostles and their followers lived.

After passing through a long passage, Li Tianran saw the true appearance of the Living Area.

This was not a cold, steel-textured, prison-like nest, but a manor full of life and greenery!

The Living Area was extremely wide. The ground was covered with newly sprouted green lawns, and even some flowers and carefully trimmed bonsai were in full bloom.

Obviously, after waking up from the long years, the apostles had decorated their palace, allowing it to recover from its lifeless state and return to its once most perfect state.

Plant growth stimulants were no longer considered advanced technology for the ancient civilization.

And on this land, there were extremely beautiful artistic buildings, sculptures, and fountains everywhere!

At the very center, there was even a huge artificial lake and river.

The Living Area was a complete ecosystem, almost like a small world!

This place was completely different from the dilapidated world outside. It was simply a paradise, magnificent and beautiful.

"What are you thinking about?" At this moment, Lu Chi, who had been following Li Tianran all the way, noticed that Li Tianran had fallen into silence and asked softly.

"These apostles' arks are so similar to the positioning of Crazy Breath Island." Li Tianran sat cross-legged on the grass and suddenly said with a smile, "I was thinking, one day in the future, if we defeat the ancient civilization and our civilization level reaches above 0.9, under the Great Destruction that will come as scheduled, will I also be forced to transform Crazy Breath Island into an ark, and then lead my people to avoid destruction through hibernation."

"Will we become a new apostle civilization and follow their old path?"