I have a full-time hero system

This is a very critical step. If there is a mistake, the defense line constructed may collapse.

Yuan Xiao also paid close attention to the situation on the front line.

Following the order, the empire's archaeological team received the news and launched a wave of onslaught.

Forcibly pushed the herd of sojourners back tens of meters.

Immediately afterwards, Sandra of the alliance gave a loud shout, and he rushed to the front.

Pushing with both palms, Wu Ling went all out, and everything he went was frozen.

In this way, the temporary herd attack stopped.

Taking advantage of this opportunity, the warriors of the empire returned to handover with the alliance archaeological team.

Seeing such a situation, everyone in the rear breathed a sigh of relief.

According to the original plan, the archaeological team led by Yuan Xiao and the herd of beasts fell into a long-term tug-of-war.

At the beginning, the morale was strong, and they were fearless in the face of the tide-like herd.

But after two days of exhaustion, some members of the archaeological team became anxious.

"Commander, if this goes on like this, we won't be able to afford it in the end." Sandra was covered in demon blood, "there are too many herds."

Yuan Xiao is also very clear, but there are no other means of coping.

He also participated in the blocking battle, Wu Zun's realm was unreserved, and he eliminated a large wave of sojourners, but there were more to follow.

The corpses of the sojourners ahead had piled up like a mountain.

The Optimus Prime device that caused the Wall of Sighs still stands in front of it, seemingly mocking.

"It would be great if we could use nuclear weapons or large incendiary bombs." Some people lamented.

However, this is unrealistic. The nuclear bomb archaeological team did not carry it and wanted to launch it from the New World. Because of the Wall of Sighs, it was impossible to accurately locate it.

Maybe it's the archaeological team themselves that exploded.

"Persist for another two days, and the troops will continue to advance." Yuan Xiao clenched his fists, this was the only way.

Every meter advanced means a greater rebound.

There are more than 1000 warriors here, they are the elite of the archaeological team, even so, they still feel tremendous pressure.

However, today's hard work has brought the archaeological team a lot closer to Optimus Prime.

Looking at it with the naked eye, the diameter of Optimus Prime is actually very large, but the specific function is not known.

On the fifth day, many captains of the archaeological team finally proposed to retreat.

"If this continues, the casualty rate of our personnel will continue to rise, and the final result will be annihilation of the entire army."

"Yes, although the number of herds has indeed decreased, the number of warriors we have withdrawn from the front line is also increasing."

"Medical resources can't keep up."

"Master Commander, please make a decision."

Yuan Xiao licked his dry lips, concentrating the power of the whole world, is it only this far after all?

"In this case..." Yuan Xiao decided to act alone with his Lirenwell archaeological team. He still has fifty Lei Chan mechas, which can jump into the high wall through space jumping.

"Commander, the battle situation on the front line has changed!" A man rushed in quickly, "You have to go and see for yourself."

I don't know if it is a good thing or a bad thing, everyone's heart is "clicking".

When everyone came outside the meeting room, they were all stunned.

Behind the densely packed sojourners in front is a towering city wall.

And at this time, on top of the city wall, many human-shaped things jumped down.

"What's that?" It's not like a mecha, nor is it a human or a cyborg.

Yuan Xiao narrowed his eyes: "It should be an artificial intelligence robot."

"Artificial intelligence robot?" Jin Suyan felt like she was in a dream, "We never knew that the technology of pre-civilization has reached such a level."

"Maybe it's the last trump card, and it's only deployed now," Yuan Xiao guessed. "It seems that there are a lot of them in the past. Let's cooperate with them and try our best to surround and kill the sojourners."

These artificial intelligence robots held laser guns in their hands, and some used chopping knives. After jumping down from the city wall, they surrounded and killed the sojourners behind.

"Put all our strength into it," Yuan Xiao made a decisive decision, "If we can't destroy the herd of sojourners together, we will choose to retreat.

But remember, whether these robots are friendly to us remains to be seen. "

The sudden hope ignited everyone's enthusiasm.

Yuan Xiao went out in person and led the team to attack in an all-round way.

If they still can't win, they have no choice but to retreat.

However, there are quite a few of those artificial intelligence robots, and their functions are good.

At first, Yuan Xiao was worried that the robots would attack the archaeological team.

Unexpectedly, after close contact, the robot did not respond to them.

It seems that the program has long been set, can not attack humans.

In this way, Yuan Xiao directed the archaeological team to let go.

The back and forth pincer attacks caused the number of sojourners to decrease rapidly.

And the morale of the archaeological team was even more unstoppable after coming back up.

It was another day of fierce fighting, and on the sixth day, there were not many sojourners left in this area.

And Yuan Xiao himself also came to the high wall.

This high wall is about a hundred meters high, and it is not a major obstacle to a warrior like Yuan Xiao.

But if you go over there, you are likely to be attacked.

He still decided to use normal means to enter the interior dignifiedly.

"The robots are still chasing and killing the remaining sojourners. They don't seem to have the concept of superiors and subordinates." Jin Suyan said to herself.

Yuan Xiao didn't see it that way.

These robots are obviously the trump card of the protection facility.

But at first, they didn't show up.

Yuan Xiao believes that this is due to the low winning rate of the intelligent system that controls them, and the archaeological team that judges and resides in the battle.

On the fourth day, when the archaeological team suppressed the sojourner, the two sides were at a critical moment, and the robot appeared.

Maybe because of the judgment of the program, plus the robot, the human side can win.

If this is the case, Yuan Xiao intuitively believes that the equipment here must be very advanced.

After all, it is what makes the Wall of Sighs exist.

What condenses is the highest glory of the former civilization.

While everyone was still discussing, the city wall shook for a while, and the gates were opened to both sides.

A robot walked over quickly.

These robots only have the appearance of human beings, without skin and clothes.

I don't know if it was done on purpose, or if the technology is not perfect enough to simulate human beings.

Of course, these are not the key.

The robot that came out, unlike other robots, has blue eyes.

Seeing Yuan Xiao and others, it immediately bowed: "Welcome back, our master."

As soon as this sentence came out, everyone breathed a sigh of relief, the robot must belong to the human side.

Yuan Xiao stepped forward: "You are the troops stationed here, left over from the former civilization."

The robot thought for a moment: "Pre-civilization? Do you mean the master who made us.

If yes, it is as you said.

Our mission is to guard this place, the last piece of pure land on the mainland. "

Yuan Xiao was noncommittal. Whether this last pure land belongs to human beings is still uncertain.

"So, besides the protection task, did your former master have any instructions?" Yuan Xiao asked.

"Yes," the robot replied faithfully, "there are still tasks for you to choose."