Apocalypse: I watch a survival game in a safe house

"Then, hunting them can harvest their energy. The same goes for the mass deaths caused by nature."

"As for the tribes in the underground world, they knew that such moments would occur long ago, and therefore created devices to collect this special energy field."

Yang Xinxin's analysis made a lot of sense. Zhang Yi didn't say anything, but just nodded silently.

The overall idea was similar to what he thought, but when it came from someone else's mouth, it sounded much more logical and clear.

Zhang Yi stroked his chin and said, "I once heard that the creatures on this planet have experienced five mass extinction events. Perhaps those underground tribes are the five generations of humans that once roamed the planet?"

Zhang Yi finds it difficult to describe them as creatures.

After all, it seems that their intelligence is no less than that of modern humans, and they even surpass modern humans in various other aspects.

Yang Xinxin nodded.

"There is indeed such a possibility."

"To escape the scourge of this world, they abandoned the surface and journeyed into the deeper realms."

"If this planet were a house, they chose to move inside rather than on the walls. This is because they knew that mass extinction would eventually come again."

Zhang Yi lowered his head in thought.

But suddenly, an inexplicable chill enveloped his whole body, causing a layer of white sweat to appear on his back.

"If we analyze it this way, doesn't it mean that... in the countless years that have passed, countless intelligent species have ruled planets, but not a single one has successfully overcome the unforeseen apocalyptic disaster?"

He looked down at Yang Xinxin and said, "One day, we will also face the same fate. But..."

He swallowed hard.

"We have clearly survived the extreme cold of the Ice Age and left behind the spark of survival."

Yang Xinxin said calmly, "That means the real crisis is still far from coming."

These words touched Zhang Yi's heart.

In fact, he already had the answer in his heart, but he was just not willing to face it.

Even powerful beings like the Gatekeeper of the Underworld, Bai Longzi, and the royal family of Nash had to choose to hide in the underground world.

What kind of terrible and unknown disaster is that?

"If that's the case, we must make plans early! We must make ourselves stronger. And, we must learn from them and build a refuge base deep underground!"

This was the first question that Zhang Yi thought of.

"Perhaps Fremons's attempt to drill through the Earth wasn't to find ore, but to prepare for future catastrophes."

Yang Xinxin said calmly, "We don't have enough information. We can only speculate based on the existing information."

"Building an underground city isn't that simple. We have to find an ideal location, ensure there are sufficient underground resources, and have the technology to at least predict earthquake patterns for hundreds of years into the future."

"And to dig a sufficiently large underground city and make it indestructible. This alone would require the combined strength of all humanity to achieve."

Zhang Yi thought of the two underground worlds he had visited.

He had only been to the outer areas of the Bailongzi tribe and had never gone deep into them.

But the country of Nash is so huge that it is as large as dozens of human cities.

Even though the current level of human technology is already quite high, it is impossible to develop it without a hundred years and the combined strength of all mankind.

The more Zhang Yi thought about it, the more difficult it seemed to him that this matter was going to be.

The most troublesome thing at the moment is that he has no idea what the final destruction that may come will be.

Ice, volcanic eruption, or tsunami.

These natural disasters are not the most terrifying things for him at the moment.