"Boom~Boom~"

The mining robot was running at full strength, and the mine tunnel was getting deeper and deeper, and the grain boundary stones on the four walls of the mine had become red, looking like red agate emitting a shimmering light.

Similarly, the energy build-up effect in the tunnels becomes very strong, where the temperature becomes lower and the rate at which the machines consume energy increases considerably.

"Attention~Attention~ The current energy consumption rate is abnormal, and the energy consumption rate exceeds the normal value by 80%!"

The miniature mecha piloted by Zhang Yuan began to alarm the police, and the mining robots in front of him obviously had a similar situation, and the mining robots lasted at full power for shorter and shorter times.

Voices can be heard from the communication channel.

"Sir, the energy is consumed too fast, one battery can only support 10 minutes! There are enough red rough stones around here, isn't it .......?"

"No, keep digging! Don't stop! All the way forward!" The voice of the brunette young man was very resolute.

"But ......"

"No, but! Keep digging! Otherwise, don't blame me for being unkind! ”

There was no sound in the communication channel, but judging from the movements of those mechs, they gave in, and the three mechs ran back and forth, constantly replacing the energy batteries for the mining robots, ensuring that the mining robots always maintained the highest power for mining.

In this way, the mining robot dug 3 kilometers deep in the direction of the asteroid's core, where the energy accumulation effect has reached a very terrifying level.

The grain boundary stones on the stone walls on both sides of the mine began to glow like flames, and the energy consumption speed of Zhang Yuan's miniature mecha increased by five times!

The dissipation of energy is completely uncontrolled, and if it weren't for the super fusion battery on the miniature mecha, it is estimated that the energy would be exhausted at this time.

However, the miniature mechs can hold on, but the mining robots cannot.

These robots have been running at full power, and the energy consumption rate is even more terrifying, a battery full of energy has just been replaced, and the energy is depleted after only 5 seconds, and these robots have basically become scrap metal.

The mechs of the three mechwarriors were obviously a little untenable.

"Sir, my mecha still has 23% of its energy left, and if it goes on like this, I'm afraid we won't be able to go back."

"Sir, do you want to keep digging?"

The mine has become extremely cold, the temperature has dropped to more than minus 50 degrees, once the mecha energy is exhausted, the warriors in the mecha will instantly turn into ice sculptures.

In this case, if you have to dig it any further, it will be a game of death.

"Keep digging!" The black-haired young man seemed determined to dig through the asteroid, and his voice became very resolute, and as he spoke, he held the hilt of the knife pinned to the waist of the mecha with one hand, as if he would make his debut if someone disobeyed his will.

The three subordinates were silent, and they didn't even dare to breathe loudly.

The black-haired young man spoke again: "No. 21, you go back now and drive me in the energy supply cart." You, and you, you two stay here and continue to change the batteries of the mining robots. Even if I can't run at full power, I need these mining robots to keep working all the time. ”

"Yes, sir."

The black-haired young man's voice implied an irresistible will, and the three mecha warriors could only nod their heads in agreement, one of the warriors turned around and ran back, while the mining robot still kept moving forward.

After about 5 minutes, Zhang Yuan heard the sound of 'boom~boom~' from the mine behind him, he turned his head to look, and saw a nearly 30-meter-long cylindrical minecart driving towards this side, with a glowing gear mark sprayed on the head of the minecart, indicating that this was an energy vehicle.

Zhang Yuan looked at the back compartment of the minecart again, judging from the shape and design details of the rear compartment, he knew that this was a large fusion battery, and the energy contained in it was enough for the miniature mecha he was now operating for 3,000 years!

This energy car has arrived, and the energy should not be worried.

"Plugging energy directly into the mining robots." The voice of the young black man sounded, and the three mecha warriors immediately complied, and after the energy line was connected, the mining robot suddenly began to run at full speed.

The energy accumulation effect here is very strong, and the heat energy generated when the mining robot is running will be instantly sucked clean by the surrounding strange spirit rough stones, so there is no problem of overheating the drill bit, as long as the energy is enough, the mining robot can continue to run.

As a result, the mining efficiency of the mining robot was greatly improved, and the mine began to go deep into the core of the asteroid at a speed of 100 meters per minute, and Zhang Yuan naturally followed quietly.

Just digging forward 20 kilometers deep, there was a sudden 'click' sound on the mining robot at the front, and then the excavation drill bit at the head of the robot was broken into two at once.

A mecha warrior immediately ran up to check the situation, and after he looked at it for a few seconds, a voice sounded from the communication channel: "Sir, the ambient temperature is too low, and all the alloy drill bits have been frozen and denatured, and it is impossible to dig anymore." ”

This time, the black-haired young man didn't speak, he didn't look at the scrapped mining robots, let alone the three men, he just kept walking forward, walked to the deepest stone wall of the mine, and stretched out his hand to press on the stone wall.

At this time, the red grain boundary stone on the stone wall has begun to glow, this light is very peculiar, pure red, the boundary is clear, and the quality is like glass.

At first glance, it looks like a layer of flowing red crystal.

When the palm of the mecha piloted by the black-haired young man was pressed on it, the part of the palm that did not enter the light immediately began to heat up rapidly, and the entire palm immediately showed an incandescent light, while outside the red border, the palm was cold.

On one side is a terrible high temperature, and on the other side is a super low temperature enough to freeze the metal apart, and it looks very weird when they appear together.

"Sir, your mech's palm is broken!" A mechwarrior exclaimed.

"I know." The young man in black had a faint voice, without any panic, as if he had known that this would happen, he withdrew his palm, the entire palm of the mecha had been completely melted by the high temperature, he looked down, turned to the three subordinates and said, "Dig here today, you go back first, I want to stay here alone for a while." ”

The three mecha warriors looked at each other, they obviously didn't want to stay in this ghost place any longer, and after a few glances at each other, they turned around and ran towards the exit of the mine.

In this mine, only Zhang Yuan and the young man in black were left.

Zhang Yuan shrank in a corner in the back, his eyes looked at the black mecha piloted by the black-haired young man without blinking, and he was very curious: "What is there to stay in such a ghost place, this guy still wants to be quiet here, it is really incomprehensible." ’

Just 2 seconds after this thought flashed through Zhang Yuan's mind, an even more incomprehensible thing happened.

Zhang Yuan unexpectedly saw that the black mecha began to kneel on the ground, and then the cockpit of the mecha actually cracked, and from the cockpit, a young man wearing an anti-load tightsuit and a breathing mask came out.

Zhang Yuan's eyes widened: "Damn, the temperature in this place has reached minus 130 degrees, and the air is very thin, how dare this guy walk out of the mecha like this?" ”

Isn't this looking for death?

Because of the extremely low temperature, as soon as the young man stepped out of the cockpit, the surface of his body, hair, and face were instantly covered with frost flowers, especially the exposed skin on his face, which was frozen and cracked, looking like a dead tree bark.

In such a harsh environment, even if this young man's physical strength is amazing, he can't last 2 minutes at most.

But the man ignored it, and continued to walk forward, until he reached half a meter in front of the inner wall of the mine before stopping, and when he reached this point, he paused for a moment.

"What does he want to do?" Zhang Yuan couldn't help but widen his eyes.

The next moment, the young man suddenly moved, he suddenly opened his hands, and then walked towards the stone wall desperately.

At this moment, even Zhang Yuan was shocked, he had just seen with his own eyes that the light on the stone wall had melted the palm of the high-strength and high-temperature resistant mecha, and now this guy had put on his whole person, wasn't this looking for death?

But looking at this guy's previous performance, he doesn't look like he is looking for death?

These thoughts flashed through Zhang Yuan's mind like lightning, and then he saw an even more incredible scene.

He saw that the stone wall in front of the young man's body had become as soft as water, and the young man's body was 'submerged' into the 'water' little by little, and then he walked into the stone wall like this.

'What's the situation?' Zhang Yuan felt that his three views had been refreshed, and for a moment, he really wanted to follow behind this young man and walk in all the way.

In the blink of an eye, the black-haired young man disappeared into the stone wall, but the stone wall was intact, leaving no trace.

Zhang Yuan couldn't help but reach out and try the situation of the stone wall around him, but as soon as the palm of the miniature mecha touched the wall, the mecha began to frantically alarm: "Alarm!" Alert! The energy ahead is highly dense and extremely destructive. ”

Zhang Yuan hurriedly withdrew his hand, he looked down at the palm of the mecha, and saw that the alloy on the surface of the palm had shown signs of melting, and if he stayed for a while, the entire palm would definitely melt into water.

'Is it true that only living beings can cross it?' Zhang Yuan guessed.

He looked at the stone wall in front of him, but he didn't have the confidence to try. The longer he looked at it, the more dangerous it became, as if as soon as he approached these stone walls full of spiritual power, his body would be burned to ashes, and the memory of his attempt to fuse strange spirits came to him.

To me, these strange spirits are highly poisonous, and they start to burn my body tissues as soon as they enter my body, but for the people of the Golden Heavens, these strange spirits can quickly increase their physical strength....... Could it be that it was because of this difference that this Golden Heaven Domain dared to take such a risk? ’

Although his thoughts were mixed, all of this was his speculation, there was no evidence, and the only thing he could do now was to stay here and wait.

Zhang Yuan waited for 3 hours.

Three hours later, just when Zhang Yuan thought there was no hope and was about to evacuate, there was a sudden movement on the stone wall in front of him. Zhang Yuan immediately turned his head to look over.

He saw that on the wall like red crystal glass, a frontal silhouette of a human body suddenly appeared, and then this outline became more and more prominent, and finally, it became a human form composed of red crystals.

The red crystal man continued to walk forward, and after about five steps, the streamer on the surface of the figure slowly faded, revealing the appearance of a black-haired young man, who was the same person who had walked into the wall earlier.

He didn't seem to be any different from before, but when Zhang Yuan felt it carefully, he found that the cold and dark temperament on this person had disappeared without a trace. The young man in front of him showed great vitality, especially the expression on his face, which was very wild and infectious with an indescribable enthusiasm.

It's like he's been reborn.

"This has come and gone, not to mention the great change in the temperament of this young man, and the spiritual strength of the whole person has also been greatly improved, and he is now like this, and his spiritual intensity is at least the level of the middle of the doomsday. What's going on here? Zhang Yuan couldn't comprehend such a method, which was beyond the limits of his current understanding of spiritual power.

Just when Zhang Yuan was full of surprise, the young man suddenly turned his head, looked in the direction where Zhang Yuan was hiding, and shouted, "Who is hiding there?" Come out for me! ”