"Click!"

Xu Xin is indeed exhausted both physically and mentally.

So strong!

"Let's go in and take a look." As she said that, Xu Ying grabbed their hands again.

This method... is convenient, fast, and simply incomprehensible!

It's as if countries on Earth thousands of years ago planted their own flags in an area to indicate that this area is their territory.

Xu Xin was silent for a moment and said: "But now... we can't be so optimistic."

"Ah, you said this, it must still have support." Xu Ying explained, "Although the underground world is all connected together, but every once in a while, there is a tree that is more majestic than the mountains, with a diameter of at least dozens of

Kilometers, or even hundreds of kilometers of 'support pillars' exist, so don't worry about this."

He looked around.

empty?

"These materials are all meteorite? They are all meteorite! Those alien bastards are really luxurious..."

Surrounded by dozens of World Tree roots, the main vine is still the most conspicuous.

Xu Xin looked at the main vine bundle.

result……

Li Wenxi tugged at Xu Xin's sleeve: "Xu Xin, is this the prison you are talking about? But... why are these cells empty?"

Transmit.

He felt tired.

"Um……"

"Bingo!" Xu Ying clapped her hands, "Yes, that's it!"

"Um, that is to say, there is a World Tree nearly a thousand kilometers away from us?" Li Wenxi asked at this time, "Actually... it's not very far."

"Ah...that's right!"

"The other party...ah." Xu Xin understood immediately: "You mean, those alien invaders' World Trees are actually planted on the 'support pillars'?"

Indeed it is.

"If they dare to attack us, just kill them!"

"Hey, you said, this underground world can't be spread all over the world, right?" Li Wenxi asked the doubts in her heart.

After all, they only knew that the safe areas of the tree house were connected. There was no danger zone in this area at that time. Who knew about the "first come, first served" principle and how the root system of the tree house below was distributed.

His feet were even slightly weak.

In order to eliminate this factor and select the survivors, they will definitely not choose to let the survivors play this survival game within the influence of the World Tree.

Now this must be their key area of ​​focus.

"Well, let's go take a look. It's safe now."

"Well, normally it's about five to six hundred kilometers in radius." Xu Ying nodded.

A "support pillar" with a diameter of hundreds of kilometers and a vertical height of only three thousand meters...

Unfortunately, in this underground world, only this area has some light, and the source is the light source where the main vine bundle connects to the dome.

"Huh? Wait, can't you teleport to places you haven't been before?" Li Wenxi suddenly thought of this and felt a little strange, "You just teleported directly to the underground world below us, right?"

"...Wait a minute, I remember you said before that the range of World Tree's influence is only a few hundred kilometers, right?" Li Wenxi suddenly asked.

Xu Xin smiled.

But they still don't know much about the details.

"You don't care much? Why?"

The familiar metal prison, the familiar spiraling staircase passage.

"The shaking has stopped." Xu Ying raised a smile, "Now, this area is our territory!"

Xu Ying has explained it very clearly.

It is much thicker than the roots of the dozen or so World Trees around it!

Even thicker than the main trunk of the World Tree.

Now, the surface area of ​​the earth has expanded a hundred times.

That is already very strong!

The World Tree canopy now basically covers the entire Crystal City, right?

Why do we say "calculated based on ground distance"? Because the underground distance and the ground distance are different.

As she spoke, there was a hint of helplessness in her tone: "This is how those alien invaders took over the earth."

Xu Xin and Li Wenxi looked at each other, and they could see the shock in each other's eyes.

"Then... what if the other party plants another World Tree around our World Tree in order to restrict us?" Li Wenxi put forward a hypothesis, "Will it compete with our World Tree for territory and affect us?"

"Your teleportation is really convenient..." Xu Xing sighed.

"Yes, but the range that can be controlled is not very large. It is probably the area covered by the canopy of the World Tree." Xu Ying thought for a while.

At first glance, the distance between each of these support pillars may seem to be two thousand kilometers. In fact, considering the current size of the entire earth, they are very densely distributed.

"They first developed the World Tree seeds that can be carried around, took these seeds to find the 'support pillars', and then planted them. In this way, their domain of rule can continue to expand in the dual worlds above and below the ground. Now, they have even occupied

Half the world.”

"To put it simply, it is similar to the safe area before your little tree house. The area affected by the World Tree is the 'safe area' of the alien invaders, and the area not affected is their 'danger'

area'.

Of course, it may also be because they don't want the "insects" of survivors to get too close to them.

Xu Xin suddenly frowned.

He thought that as soon as they entered, they would hear the noisy chirping of giant insects in the prison.

The three of them are also waiting for the shaking to stop and for roots to cover the area.

Xu Xin imagined it for a moment.

empty.

Throughout the underground prisons, in the prisons where violent behemoths were originally held, at this time...

There is no beast!

At a glance, it was completely empty, not a single mutant creature.

Where have all those mutated creatures gone?
Chapter completed!