Xu Xin looked around at the strange-looking alien invaders coming from all directions.

This scene would definitely scare most people to death.

The thought of joining this group made his scalp tingle.

If it weren't for the stealth cloak on his body that gave him a certain amount of confidence, he really wanted to turn around and go back.

He turned his head slightly and looked behind him.

The long corridor behind him appeared abruptly in the interior space of the entire World Tree, like a kilometer-long train body.

Inside the entire World Tree, this corridor that looks like a train body is the only thing that can be called a "building", and the rest of the place is flat.

On both sides of the corridor, there are also many alien invaders setting up stalls.

Unexpectedly, when they were walking in the corridor just now, they were only separated from the alien invaders by a wall, only a few meters away.

At this time, Lou Feier leaned gently towards him.

Xu Xin looked at her with a questioning look.

She opened her cloak slightly, and Coco quickly slipped out of her arms and into Xu Xin's arms in an instant.

Cold sweat suddenly broke out on Xu Xin's forehead.

He slowly looked around.

Fortunately, no one around noticed their presence, and the alien invaders were still immersed in their market.

Xu Xin breathed a sigh of relief.

At this moment, Li Wenxi beside him gently tugged at his arm again.

Xu Xin looked at Li Wenxi, only to see her looking at the corridor behind them with a look of fear and shock.

Xu Xin looked towards the corridor again.

He couldn't help but take a deep breath through his nose.

I saw the wooden corridor behind me slowly opening under the seriousness of several people...

It becomes transparent!

The originally wooden corridor became like glass, and the situation inside could be clearly seen from the outside!

The group of alien invaders were also attracted by this change for a few seconds.

Of course, since they have eyes all over their bodies, they don't need to turn their heads to look like humans. Instead, they seem to straighten their ink-black bodies and open their eyes wider towards the transparent corridor.

Xu Xin and his companions were not far from the entrance of the corridor, and the eyes of these alien invaders were fixed directly on them.

There was no shelter on any side, and the only shelter - the corridor - was transparent, causing them to be directly exposed to the gazes of all alien invaders from all directions.

Li Wenxi tightened her grip on his arm.

Lou Feier and Jin Yue both gathered around the two of them and looked around vigilantly.

Fortunately, the alien invaders' gaze did not last long.

They seemed to have become accustomed to the changes in the corridor. They only paid attention to this side for a second or two before returning to their original state.

It's as if this kind of thing is so common that it's not worth paying attention to.

All four of them breathed a sigh of relief.

Xu Xin looked around again, his sight stopped at the crack of the open door of the corridor, and he could see the interior of the corridor.

Huh…?

It wasn't something he went to see on purpose.

After all, the entire corridor is transparent, and you can see inside even without looking through the crack in the door. Generally speaking, people don’t pay much attention to the crack in the door.

But the current situation is different.

Because Xu Xin discovered that when he looked inside through the crack in the door, he could still see the completely opaque, deep red wooden wall with annual rings.

In the completely transparent corridor, only the crack in the door was not transparent, which of course caught his attention.

His expression changed slightly.

What does this mean?

This shows that although the corridor is transparent when viewed from the outside in, it is still opaque when viewed from the inside out!

That is to say, people outside can see inside, but people inside cannot see outside.

Judging from the reaction of the alien invaders just now, this kind of change is actually very common. It's common to see them just glance over here and then not care.

...Could it be that when they were walking in the corridor just now, the corridor was also transparent?

Li Wenxi and the others also noticed this situation and showed some fear on their faces.

It turns out that when they were walking in the corridor just now, they were not safe at all. They could be seen by the alien invaders outside...

It’s no wonder there’s not even a camera in the corridor, it’s empty, because there’s no need to install one, because people outside can see directly inside!

It seems that the difficulty of infiltrating this World Tree is simply hellish...

Even if you know how to get in, and think you haven't been discovered after entering, you have already been seen over and over again by hundreds of alien invaders...

If other alien invaders wanted to sneak in here, it would be absolutely impossible.

Xu Xin showed a wry smile on his face, as if he had survived a disaster.

Zhao Xiaochuan's stealth cloak has saved them too many times when they were slow to realize the situation.

This thing is simply an invincible artifact when it comes to sneaking in, and it plays its role perfectly.

Come to think of it, this is the World Tree that has existed for nearly a thousand years. It is the base camp of alien invaders. How could it be so easy to sneak in?

It was just that they were lucky, otherwise they would have died on the spot as soon as they came in.

After figuring this out, Xu Xin actually relaxed.

Since they were not discovered in such a terrifying surveillance corridor, it has already proved the extraordinary effect of the stealth cloak.

They don't need to be too nervous.

"Hmm..." Coco was in Xu Xin's arms, with her little head half out and her little paws half out, pointing in one direction.

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