"I'll go in first to see if there is any danger now. You can wait outside." Xu Xin stopped the steps of several people.

If there is really a situation inside, it will be difficult to deal with when you go in. There will always be someone who will observe the situation outside.

"Okay, you are familiar with this place. We will help you watch outside. If there is any situation, you will remind you." Ji Chaoyang nodded.

"Be careful, run out if you are in danger!" Li Wenxi did not insist on following him, but said with some concern, and at the same time took out the crossbow, preparing to take action if there was any situation.

"Okay." As he said that, Xu Xin stepped into the mine. Keke did not stop him this time, but instead yawned a little in Li Wenxi's arms and continued to close his eyes.

After stepping into the mine, Xu Xin did not feel any sense of crisis in her heart, and the ground did not crack, and everything was very normal.

This mine once again restored its previous peace.

Xu Xin looked into the deepest part of the cave. The bottomless cave that was originally in the deepest part had disappeared at this time, and the ground returned to its normal appearance.

During the defense battle, some of the mutated big ants emerged from the hole.

He walked to the deepest part of the cave, took out the long halberd, and used the tip of the halberd to scratch the original location of the cave twice.

The land is thick, and there is no sign of excavation in this land.

"It's really strange." Xu Xin frowned.

Not only this cave, he discovered the three caves of the red fog flowers, the heart of the plant, and the pangolin group, which also disappeared after the defense battle.

Can these caves be alive and close themselves?

but……

He looked at the trace he had just drawn on the ground.

This trace did not automatically repair and heal like the last time Xu Xin came.

This mine will not be automatically repaired when he first came?

So can he mine salt mine again?

He stroked the ground twice with his long halberd.

But the situation suddenly happened.

Just as he stroked these two times, the surrounding rock wall suddenly vibrated slightly, and countless small stones fell from the rock wall. He could feel that the land under his feet was also shaking slightly.

"What's going on?" Xu Xin's whole body tensed up.

This is in the "giant's mouth", so you must not take it lightly.

Just as he looked around with his tense spirit, he suddenly realized that the wall on the side seemed to be... cracking?

"Click!"

A slight cracking sounded clearly in Xu Xin's ears, and he saw cracks as thick as fingers appeared on the wall.

All the surrounding walls have not changed, only here is a crack.

Could there be something behind this wall?

The crack continued to expand to two fingers. Xu Xin found that a faint white light emerged from the crack, which was extremely obvious in the depths of the dark cave.

Sure enough, there is something!

Just as he was nervously watching the crack, a commotion suddenly came from behind him.

"Yeah!Yeah!!"

"Ah! Xu Xin! Come out quickly! Come out quickly!"

Coco and Li Wenxi's anxious shouts came from behind him, and he immediately turned around and looked at the entrance.

The intriguing situation suddenly made his pupils lock!

The entrance to the mine cave, which was several meters wide, was slowly closing!

The rock at the entrance of this cave was moving left and right at a speed visible to the naked eye!

The moving rocks are like living flesh and blood, even giving people a feeling of squirming!

Xu Xin quickly glanced at the crack. The crack became bigger and the white light became more obvious.

Li Wenxi almost rushed in in a hurry, but was grabbed by Qi Xuefei.

Even if she rushed in, it would be useless, and instead slowed down Xu Xin's speed of coming out.

Li Wenxi naturally understood this truth. She shouted at the entrance of the cave: "Come out! Come out quickly! The entrance of the cave is about to close! Why are you still standing?!"

If this was an ordinary door, they might not have been so nervous, but the shape of this hill reminded them all the time that this cave was like a giant mouth.

No one knows what will happen inside when the giant mouth is closed!

Xu Xin swallowed, and ran out suddenly without caring about the cracks on the wall!

The hole is closed very quickly, and it seems that it can be completely closed in just five or six seconds!

Only then did Xu Xin realize that this hole was much deeper than when he came last time!

The last time he came, the deepest part of the cave entrance was only more than fifty meters, but now, he is looking at the entrance of the cave entrance is seventy or eighty meters away from him!

Even though he is much more physically strong now, five or six seconds is not enough to rush out to 70 or 80 meters! Especially the ground in the mine is still bumpy and bumpy, which slows down his speed!

The moment Ji Chaoyang started to close the entrance, he immediately took out his iron spear and was spread over the entrance, hoping to use the iron spear to block the entrance of the entrance without affecting Xu Xin's coming out and slow down the closure of the entrance.

But the sharp spear was immediately clamped by the hole that had been closed, and the powerful force instantly made the entire spear penetrate into the wall of the hole. As the hole was closed, the gun body bent and the spear head became deeper and deeper.

Xu Xin felt the mine cave vibrate even more violently, and a sudden sound of wind came from behind him.

But he didn't have time to look back and still rushed towards the entrance of the cave!

It's closed too fast, too late!

At this time, the Silver King suddenly rose up on the spot, jumped dozens of meters, and jumped directly in front of Xu Xin.

Xu Xin's eyes lit up suddenly, and he instantly pounced on the Silver King, grabbing the Silver King's wolf hair.

Seeing that Xu Xin had already pounced on its sacredness, the Silver King burst out again and rushed towards the exit!

Just as the entrance of the cave was about to close, the Silver King rubbed the hole with only a narrow gap, quickly drilled out of the mine, and rushed out dozens of meters!

At the same time, the sound of stones colliding and squeezing came from behind.

Xu Xin looked back and saw that the entrance to the salt mine cave had completely disappeared, and it had become an ordinary mountain!

"...Silver King, you really saved my life this time." Xu Xin's heart thumped.

"Aowu!" The Silver King responded and lay down. It was also very tired when it suddenly exploded at this speed.

The Silver King's explosion speed is faster again. Although it is still much worse than the extreme speed of Mimi, it can be compared with some large cats.

But, what's going on?

Why do salt mines close?

"Xu Xin, are you okay?!"

"Yeah!Yeah!"

Li Wenxi and Keke both ran to Xu Xin. Keke was around Xu Xin, and Li Wenxi also grabbed his arm.

"Don't worry, it's okay." Xu Xin hugged Coco, who stood up at his feet and looked up at him, rubbed it hard, and breathed a long sigh of relief.

Just now, it was really a critical moment.

"Yeah!" Keke, who was suddenly rubbed, knew that Xu Xin had nothing to do, so he broke free from his hands and climbed onto his shoulder and lay down.

At this time, Ji Chaoyang and Qi Xuefei also came over.

"I was almost locked up inside. Did you see anything inside just now? Why did you keep staring in the end?" Ji Chaoyang asked.

"Yes, what happened to you in the end! You clearly saw that the entrance of the cave was closed, but you were still standing like that. I was in a state of panic!" Li Wenxi said with lingering fear.

Xu Xin glanced at the still closed hole.

With a sigh of relief, he said everything he saw inside.

It didn't come out immediately just now because a possibility suddenly appeared in his mind.

There is a gradually expanding crack on the stone wall. After the entrance of the salt mine cave is closed, will the crack on the wall be completely cracked and he can enter and explore the secret?

This thought lingers in his mind, causing him to be in a while.

But in the end, his cautious victory was still the one who won.

He didn't know what would happen if he stayed, nor did he know whether it was a treasure or a danger behind the rift, and he didn't want to put himself in danger.

Finally, what he thought was that if he could, he would rush out, and he wouldn't rush out before he could rush out!

Fortunately, the Silver King finally broke out to save the Lord and brought him out.

"You slashed on the ground twice, and the entire mine began to shake, the stone wall cracked, and then the entrance here began to close." Ji Chaoyang summarized his experience.

Xu Xin nodded and told these people about his previous experience in this cave.

"This cave can repair itself before, just like treating injuries." Xu Xin concluded finally.

Several people subconsciously looked at the hill, and the giant's head-like structure made people think of many things.
To be continued...