Yun Chen clearly saw the outline of those black dots.

It is a series of holes dug in the surface of the planet, supported by various special metal structures that prevent it from collapsing.

Above the entrance of the cave, an endless stream of monsters came in and out of it, and the scene was once very spectacular.

Not far from this cave group, there are many similar cave groups scattered in various locations on the surface.

"The inside of these caves has been dug into a passage by the ancestor civilization?"

Yun Chen was a little surprised.

"I can't live on the surface well, I like to live in the ground, I think the name Zerg civilization is more suitable for you. ”

Scanning the ruins of all sizes near the entrances of these caves.

"It is estimated that this planet was also robbed by the invasion of pioneer civilizations,"

Judging from the scale of these ruins, the original civilization on this planet must have been quite developed, and many of these special material buildings were obviously impossible to create by humans on Earth.

"This kind of civilization can be conquered by the pioneer civilization, let alone the civilization of the earth. ”

Shifting his gaze to another wormhole.

It's the same planet, but there is still billowing smoke on this planet, and it's obviously a planet that has just experienced a great war.

"Damn, judging from the scale of these ruins, this war is obviously quite fierce. ”

From the remnants of the planet's buildings, the former glory of this civilization can still be faintly seen.

The collapse of a building actually suppressed the range of a hundred and ten miles on the surface, Yun Chen conservatively estimated that this building was once at least a thousand meters high, and this kind of construction strength was completely unimaginable to human beings.

So the question is, why did the pioneer civilization invade the earth for so long without success?

Yun Chen understood after thinking about it casually, the civilization that went first didn't take the earth civilization seriously at all, and randomly sent two or three monsters to prepare to grind the earth to death by this, and the main forces of the pioneer civilization were concentrated on those civilizations that were more difficult to invade.

"At the very least, human beings are still lucky, thanks to the pioneer civilization did not take the earth seriously, otherwise human civilization would have been drowned in the long river of history. ”

The war on this planet should not be over soon, and on the wormhole leading to this planet, dense monsters go back and forth, constantly carrying the spoils of defeated civilizations back and forth.

"Ah, the pioneer civilization has invaded so many civilizations, it's so rich. ”

Yun Chen couldn't help but lick his mouth. (The action he thinks in his heart)

"Do you want to steal it all for him? Yun Chen had a bad idea in his mind, "When the pioneer comes to check the loot, he can only check his loneliness." Hey, hey, hey. ”

Yun Chen quickly returned his attention to the wormhole, turning off the use of the Ultra Eye skill, and Yun Chen's vision returned to normal.

Look at dozens of wormholes suspended in the air.

"These were successfully invaded by pioneer civilizations?"

"It's not too awesome. ”

Sure enough, if you use crowd tactics to grind, you will eventually be unable to withstand it in a powerful civilization.

According to this situation,

If humanity wants to defeat the pioneer civilizations, there are only two ways.

One is to create mechs of the same size as the monsters of the pioneer civilization, and the two sides will consume each other and fight a war of attrition.

One is to strangle the pioneer civilization from the source, and directly destroy the monster manufacturing project or energy of the pioneer civilization, so that its monsters can no longer be manufactured, and the pioneer civilization will no longer have a steady stream of reinforcements, and then humans will use all the firepower of the whole earth to snipe the remaining monsters. ”

Obviously, the second of these two methods is more feasible.

The first method is obviously extremely difficult for humans, first of all, the speed of mecha construction is definitely not able to keep up with the speed of monsters, and the cost is too high, if you want to fight a war of attrition with a civilization like the pioneer civilization that has the support of dozens of worlds, it can be described as a fantasy.

And the second method, the feasibility is quite high, although there are many monsters in the pioneer civilization, but the number is limited after all, and after Yun Chen's observation, many monsters are ordinary monsters at all, not all monsters have received the strengthening of the origin of the universe,

Yun Chen looked at it casually, there were only a few monsters in the dense group of monsters that had the breath of the universe origin, Yun Chen estimated that it was not easy to fuse the universe origin and monsters together, only the main monsters or very important monsters that invaded other worlds would receive the strengthening of the universe origin.

And ordinary monsters are not particularly difficult to deal with for the technology of the Pacific Rim humans, and the reason why the humans of the Pacific Rim have been more difficult to deal with ordinary monsters before is because the blood of the monsters contains very deadly retest toxins, and the pollution of the earth's environment is too huge, and humans have to come up with mecha to solve the monsters in a fist-to-flesh way.

The biggest problem at the moment is what to do with the highly toxic and corrosive substances in the blood of monsters that are quite damaging to the environment.

"This is a bit nerve-wracking, this monster's blood can't be said to drain him directly, it's definitely impossible, then the only way now is to think from the perspective of the external environment. ”

I couldn't think of a way for the time being, so Yun Chen had to put it down for the time being.

As for destroying the monster's manufacturing plant from the source, that was exactly what Yun Chen was going to do next.