After swimming, Bai Na suddenly sped up and swam in front of Mordin, turning around and gesturing at Mordin. She first stretched out the two index fingers and middle fingers of her right hand, pointed her fingertips at Mordin's assassination motion, then used her two palms to draw a two-foot-long distance, and then used her right hand to draw the width of a palm, and then stared at Mordin and waited for his reaction.

Mordin understood what she meant, and she gestured to the shape of a sword.

Feelings: This girl really didn't pass out last night. She was awake the whole time when Mordin picked her up and swam to the surface. Then she must have seen it too, the void sword hanging on the back of Wang Xian's neck.

No wonder she has always wanted to be a pair with herself, it turns out that she has this question to inquire! so cunning, she was almost deceived by her.

Mordin had no choice but to pretend to be confused, spreading his hands to show that he didn't understand.

Bai Na was anxious, and gestured with the sword again, and used her right hand to make a hand shape of a phoenix wing with the hilt of the sword.

Mordin thought about how to deal with her, and he took out the shark knife from his waist and handed it to Bai Na.

Bai Na practiced and waved her hand, indicating that it was not this.

Mordin was adamant about not admitting that he had something else.

Just when the two were at a stalemate, something saved Mordin.

A 3-meter-long sea snake suddenly burst out of the grass. It was a black-ringed silverback sea serpent with a pointed tip on the top of its head, which glowed blue.

The two were taken aback, the sea snake is highly venomous, and a bite from it can be fatal.

Fortunately, the sea snake ignored them, swam along the trench with its body, and they quickly followed.

The sea snake swam very fast, and after a while, it was getting farther and farther away from them, and there was only one point of light left, and Bai Na's speed was obviously unable to keep up. She waved her hand at Mordin anxiously, signaling that Mordin would catch up alone, and she was about to float up.

Mordin made an "OK" gesture at her, turned his head and quickly chased in the direction of the sea serpent.

The sea snake seemed to be playing with Mordin, it would burrow into the grass for a while, and when Mordin got closer, it would come out of the grass and swim forward quickly, so it stopped and walked, and chased it out for a distance of seven or eight hundred meters.

Mordin kind of regretted that he didn't bring a camera. In fact, he didn't buy a camera because he didn't feel the need for it. Although there was a learning machine to take pictures, he put it on the yacht, and Bai Na had an underwater camera, but forgot to bring it with her.

He could only chase the sea snake closely, hoping that the water sound signal sent by Bai Na would attract the other team members in time.

After a little more chase, the sea serpent suddenly disappeared behind a rock.

Mordin swam behind the reef and searched carefully, and soon found a cave into which the sea snake should have burrowed.

The cave is about 1 meter wide, and the entrance is very hidden, so it is difficult to find it without looking carefully.

Mordin didn't dare to venture into the cave, he decided to wait here, maybe the sea snake would come out again in a while, anyway, he still had enough oxygen in his gas cylinder to stay underwater for a few more hours.

Just as Mordin was staring at the entrance of the cave and waiting for the sea snake to come out, he suddenly realized that something was wrong.

He looked closely at the entrance of the cave and found that there was a faint red light inside, flashing as if it was sending out some kind of signal.

"How can there be red light in this hole?" "Red light with a longer wavelength is easily absorbed by seawater, making it difficult to travel long distances. Therefore, the light and glowing fish seen on the bottom of the sea are mainly blue-green.

How does the mysterious red light appear here?

This red light is very faint, close to the color of infrared light, and ordinary people's eyes can't see it at all. Mordin's eyesight has been modified and is also sensitive to long-wavelength light such as infrared light, so after careful observation, he discovered this secret.

"There must be something in the hole. Mordin thought. He was thinking about whether to go in and have a look, or wait for his friends to come.

Mordin waited for a while, but still didn't see the other team members coming, he estimated that the sea conditions in this sea area were complicated, and the water sound signal sent by Bai Na was not easy to be received by the other team members.

"Anyway, when the other team members come, they won't dare to go in, so it's better for me to go in first and have a look. Mordin thought to himself: "They can't see the light at the entrance of the cave, and they will doubt me at that time, so it's decided." ”

After making a decision, Mordin pulled out the Void Sword at his waist and held it in his hand, poked his head into the hole, and cautiously crawled into the cave.

After entering the cave, Mordin found that the cave was diagonally downward, and he adjusted his posture, and his head rushed down, observing as he crawled, for fear that the sea snake would suddenly come out and bite him.

After climbing more than ten meters, the cave became wider. Mordin slapped the water with his flippers instead, and continued to dive down to swim over.

There were many kinds of fish in the cave, because the searchlight on his head shone in the dark cave, the fish were attracted by the light, and swam towards him, Mordin quickly turned off the light on his head, and then he found that the red light in the cave was a little stronger than the entrance of the cave, and these lights were enough for him to see the scene in the cave.

He continued to swim down the cave, and after swimming a short distance, he found the sea serpent. At this time, it was hiding in a rock crevice, preparing to prey on small fish passing by.

I stopped inexplicably for a while to see if it was still more difficult to catch the sea snake. So he gave up on this plan and continued to dive.

Along the way, several predatory sea snakes appeared, some with fluorescent heads and others without.

When you get to the bottom of the cave, the space suddenly opens up, and it is enough to accommodate a small three-story building.

Mordin looked at the depth gauge and the pointer stopped at 120 meters.

There were more fish at the bottom of the cave, but there was no sign of the sea snake.

Mordin also noticed a strange phenomenon that the fish were concentrated on the right side of the cave and ate on the seaweed that grew on the rock wall, while there were no fish on the left side of the cave wall.

Mordin came to the left side of the cave wall and found that it was an unusually smooth stone wall, and he touched it with his hand, and found that the stone wall was actually a little soft, not like it was made of hard rock.

"It's like it's made of artificial rubber sheets, what kind of building is this, and it would appear in this place?" he thought in confusion, and then his eyes were drawn to a hole in the lower right corner of the "rock wall".

He swam to the entrance of the cave and found that it was a circular cave with a diameter of more than 1 meter, the wall of the cave was very smooth, nearly 3 meters deep, and the end of the cave seemed to be an open space, and the red light inside was even more intense.

"It looks like an entrance. Mordin slowly swam in, and when he reached a place of more than 2 meters, he found that the material of the cave wall had changed, as if it was another layer of shell, more than a meter thick. Mordin poked with the shark knife, and the hard alloy steel blade didn't leave any marks on the shell.

"It looks like it's a metal case. Mordin was even more curious, what kind of device needs such a thick metal shell?

At this time, the entrance to the cave also became narrower, only more than half a meter wide, and he couldn't get past it with scuba wearing. He took off his scuba and set it aside, half into the narrow hole, and beyond the narrow hole was an open space, and he tried to drag the scuba into it.

However, an invisible membrane blocks the way forward.

Mordin thought it was strange, it was clear that there was nothing, but it was blocked by an invisible membrane.

He thrust the shark knife back into his waist, reached out and pulled out his Void Sword, stabbing at the membrane.

The tip of the sword stabbed into it easily, and Mordin reached forward with all his might, and the arm holding the sword also entered, but the sleeve was blocked out.

Mordin simply shook off his mouthpiece, withdrew and took off his diving suit, and went into the hole again and drilled hard, this time he successfully drilled his head in, and then his shoulder and other arm also squeezed in, he supported the wall of the hole with his elbows, and squeezed his body in, and it was successful, the person came in, but the underwear fell outside, he didn't care about his bare ass, and then looked around at the space.

"No one is watching anyway!"

There is no seawater in the space, so it is very dry. Mordin didn't know if the air was poisonous, so he held his breath and walked around the floor on what looked like a large room to see if he could find any clues.

The room was empty, and there were some odd-shaped objects embedded in the walls, and Mordin pushed it with his hand, but he didn't push it. He then looked around, and found a door, and with a hard pull, it opened.

Outside the door was a long hallway, and Mordin walked along the corridor and found many similar rooms on either side of the corridor, which were as empty as usual, except for the strangely shaped protrusions on the walls.

After walking for about ten minutes, Mordin estimated how long he could hold his breath, and planned to walk more than ten meters before turning back.

After walking for about 10 meters, I turned a corner and the corridor came to an end.

He walked out of the hallway, and his eyes widened. There is a huge space in front of it, and you can't see the edge at a glance.

If he walked further and there was no ground, Mordin walked to the edge and looked down with his head out, startled.

Below is a huge pit that is more than 1,000 meters deep, and if you accidentally fall from here, you will definitely fall into a patty.

Mordin was stunned by the sight at the bottom of the pit.

At the bottom of the pit is an endless stretch of flat land, dotted with hillsides, trees, and lakes of all sizes.

What surprised him even more was that in these hillsides and lakes, there were dinosaurs of all sizes, densely packed, at least more than tens of thousands!

"If there are dinosaurs and trees, there should be oxygen here. He exhaled a puff of exhaust gas, trying to take in a small puff of gas, yes, air, very pure air.

He took a few big breaths and felt that there was no problem at all, so he put his mind at ease and no longer worried about the oxygen consumption time.

"How can there be so many dinosaurs here? Didn't they become extinct 60 million years ago? Is this a paradise? What the hell is this place?"