Xu Xin's crossbow arrow did not kill the piranha, but it died under the mouth of his own fish.

These piranhas were probably in this situation because they had just mutated and were very hungry. The Silver King also ate a whole deer just after the mutation was completed, and he was still a little unsatisfied.

This made Xu Xin even more determined to kill them all. After the Silver King had a meal, the next day it was a whole circle bigger. These fish could not continue to grow bigger!

It was convenient for Xu Xin that these piranhas were so hungry to attack the same kind. He also felt that to kill a large mutated piranha, at least several crossbow arrows would be needed, although he picked them up in vain on the underground trap road.

There are quite a few crossbow bolts, but you should save them if you can.

Another crossbow bolt was fired, and the same situation happened again. The other three fish immediately started to bite the injured and bleeding fish crazily.

Within ten seconds, the second fish only had a fish skeleton left, and even the meat of the previous fish in its belly was eaten by the other three fish, leaving nothing at all.

"It's so easy." Xu Xin was happy. Although it was a pity that he couldn't obtain the piranha material, he himself didn't dare to enter this range. If he was eaten, he would be eaten.

After finishing off another piranha, Xu Xin fired a crossbow at each of the remaining two, letting the two injured fish eat each other. In the end, the two piranhas were eaten by each other until their naked bodies were exposed, and they both headed towards the bottom of the lake.

Falling into the abyss.

At this point, the piranhas in the middle of the lake have been completely eliminated.

After resolving the thorn stuck in the heart after the beast woke up, Xu Xin felt physically and mentally comfortable.

Next, he was going to take a look at the huge cave at the bottom of the lake.

He did not dare to swim directly downward, but swam back to the shallow water area first. After all, the piranha's activity range is in the center of the lake, directly above the huge abyss hole. Looking directly down from the center of the lake, the bottomless black abyss is really real.

It was impossible not to feel fear in his heart. He was always worried that some giant beast would swim up from the abyss with its mouth wide open and eat him in one bite.

When he came to the cave wall that suddenly became deeper, he slowly dived down.

Xu Xin has dived before. When he went to the southernmost island of his motherland, he experienced diving. A professional diving instructor took him to a depth of about ten meters. He also received basic training for about half an hour before diving.

Through training, and having read some information myself, I am well aware of the harm of water pressure to the human body.

The water pressure in deep water is very scary and can pose a threat to various organs of the body.

During the dive, Xu Xin began to judge the impact of the water pressure on him. When he was experiencing diving, his ears began to feel uncomfortable when he dived three or four meters deep, and he needed to balance the ear pressure. But this time, Xu Xin

Xin had to dive about seven or eight meters before he started to feel that way.

He used the method he had learned, pinching his nose and blowing it, and his ears felt better.

Xu Xin began to calculate in his mind. When he experienced diving before, he began to feel uncomfortable at a depth of three or four meters, but now, he did not start to feel this way until about seven or eight meters. In other words, the impact of water pressure on him was also affected by this.

The scale armor has been weakened, and the depth he can dive into has doubled.

Without diving equipment, ordinary people can dive to a depth of ten meters at most. Trained professional divers can reach a depth of more than fifteen meters, but that's it. Seventeen or eight meters is almost the limit for most professional divers.

The ultimate in diving without equipment.

Of course, the world record set by a top adventurer is much higher, but a complete layman like him cannot compare with a professional diver, let alone a world record.

He is just an ordinary person who has experienced diving. He knows that he has no diving experience. Without a suit, even if he can breathe in the water, the depth of more than ten meters is about the same. With a suit,

He can try to explore to a depth of about twenty meters.

Twenty meters is not considered diving, and the height of a seven-story building is only twenty meters.

No matter how deep the area is, he will not go. Deep water is a very dangerous area, and this huge hole is even more dangerous. Not to mention the monsters that may appear in the water, the water pressure alone may directly kill him. If he dives too deep,

, even if it can come up, the consequences will be extremely serious.

He cherishes his life and does not want to die.

However, the blue-level resources on the cave walls are probably about 20 meters deep, and he can try to pick them.

When he dived about fifteen meters, Xu Xin finally saw the blue-level resources. They were strips of water plants growing on the cave wall. Three dark green water plants were floating with the slowly rotating undercurrent in the cave.

.

It seemed like... he had just eaten a blue-level aquatic plant! Unexpectedly, this kind of aquatic plant actually grew on the cave wall in twenty meters of water.

Slowly swimming downstream, Xu Xin finally came to the blue-level water plants.

That's right, it's the water plant (blue), which can provide the ability to breathe underwater. The water plant (blue) he bought from Qin Yunlong!

"This waterweed most likely only grows at this depth. Unexpectedly, the Qin Yunlong brothers can actually dive to a depth of twenty meters. They are indeed professional diving instructors." Xu Xin did not think that they could have the same purple level as him.

Suit, they should rely entirely on their own ability to dive.

...or they possess some special underwater ability.

After picking the aquatic plants on the cave wall and putting them into his backpack, Xu Xin began to rotate along the cave wall at this depth. There were some blue-level aquatic plants growing on the cave wall, and he wanted to pick them all. These were strategic resources.

Swimming along the cave wall, Xu Xin looked deeper into the cave. When he looked directly into the depths of this huge cave, he always had a creepy feeling. It made him deeply realize that when you stare into the abyss, the abyss is also there.

The feeling of staring at you.

He always felt like something was staring at him from the depths of the huge cave.

Could it be the giant anaconda, or something else? Maybe it was his imagination.

Because Xu Xin had already dived twenty meters, he was much closer to the things that were much larger than him and swimming back and forth in the depths of the huge cave, and he could already roughly see their appearance.

It was a kind of fish with a body length of three to four meters. The mouth was very sharp, the eyes were protruding, and the body was very flat. It looked a bit strange. The color of this fish was similar to that of the surrounding cave walls. If they didn't swim like they do now

If they were not moved, but stuck to the cave wall, Xu Xin might not be able to detect them.

Fortunately, the appearance of the fish was not very weird, and it did not look like a monster, which made Xu Xin slightly relieved.

He could see about four or five of these fish within his line of sight, all in waters below sixty meters. They were far away from him, so he didn't have to worry about them attacking him.

After walking around the cave wall, he found a total of eleven aquatic plants within his depth range. Apart from aquatic plants, he did not find any other blue-level resources.

Although there is still some blue light in the deeper waters, Xu Xin will not continue to dive. Those resources are basically at a depth of about thirty meters, which is not a depth that he can dive at all. If he really wants to go

With that kind of depth, if anything happened, he would probably stay in this abyss forever.

However, at a depth of sixty meters, within the range of those strange fish activities, there were some stones on the cave wall that attracted his attention. The stones protruding from the cave wall emitted a green light, and there were several

One emits blue light.

"Ore?" Xu Xin narrowed his eyes, trying to see the stones clearly.

The color of those stones is different from that of the cave wall. They are green in color as a whole. They are scattered all over the cave wall at a depth of 60 meters. There are quite a few of them.

"Green ore, what ore is green? Copper ore?" Xu Xin didn't know much about this, so she was a little confused. Maybe it was a stone that didn't exist in the world originally, like the black gold discovered by Li Wenxi.

The most important thing is that it is impossible for him to dive into such a deep depth at present, and there is no point in thinking about it. Even if there is copper mine that can make electrical appliances, he can't get it.

Xu Xin decided to dive deeper slowly to see how deep he would feel discomfort.

Xu Xin began to feel obvious discomfort when he was only four to five meters deep, so he began to stop diving and slowly surfaced.

Is it a depth of twenty-five or six meters? Not counting the influence of the scale armor, the depth he can dive is about twelve or thirteen meters. This has not yet reached the limit of ordinary people, let alone his body that has been strengthened many times.

A person who can still breathe underwater. If he undergoes special training, Xu Xin feels that he should be able to dive to about 40 meters.

It seems that I am going to ask the two brothers Qin Yunlong for their diving experience.

There were no other resources around, so Xu Xin planned to go up. The effects of the aquatic plants he ate were about to wear off, and he needed to get back to the water as soon as possible.

Xu Xin did not swim up quickly. If the water pressure changes too quickly, he may suffer from decompression sickness or explode his lungs and die. Of course, Xu Xin's depth should not be that serious, but he may still injure his eardrums.

I don't want to become deaf.

Floating upward slowly, Xu Xin finally poked his head out of the water and returned to the shallow water area. When his feet stepped on the ground, he let out a long sigh of relief.

Although the underwater world made him feel novel, he felt very bad in the huge cave. The strong water pressure made him dare not go deep or rise quickly. His movements were restricted, as if he was in a huge and deep cave.

It's like being in a deep prison.

Fortunately, this trip was not fruitless. At least he gained eleven more aquatic plants, which greatly increased the time he could spend underwater. If the heavy rain season really caused floods, with this scale armor suit and these aquatic plants,

, there would be no problem even if he was caught in the flood.

Xu Xin dug some lotus roots in the shallow water area.

Fish may mutate, but these mature lotus roots should not, right? The kitchen is ready, go back and squeeze the oil from the beast meat, and make fried lotus roots and eat them.

Walking out of the lake onto the ground, he looked back at this seemingly beautiful but dangerous lake. There were no longer those wandering piranhas in the center of the lake, and the lake seemed to be back to the way it was when he first came to the lake.
Chapter completed!