Xu Xin's crossbow arrows failed to kill the piranha, and it ended up dying in its own fish's mouth.

These piranhas were probably just mutating and were extremely hungry, which was why they were in this state. The Silver King had just eaten a whole deer right after it mutated, and he still felt unsatisfied.

This made Xu Xin even more determined to kill them all. After the Silver King had a meal, it grew a whole lot bigger the next day. These fish couldn't continue to grow any bigger!

The fact that these piranhas attacked their own kind so hungrily actually made things convenient for Xu Xin. He also felt that to kill a large mutant piranha, at least several crossbow arrows would be needed. Although he had picked up a lot of crossbow arrows for free in the underground trap, he still had to save them if possible.

Another crossbow arrow was shot out, and the same situation happened again. The other three fish immediately bit the injured and bleeding fish frantically.

In just over ten seconds, only a skeleton was left of the second fish. Even the meat of the first fish in its stomach had been eaten by the other three fish, leaving nothing behind.

"It's so easy." Xu Xin was happy. Although it was a pity that he couldn't get the piranha materials, he himself didn't dare to enter this range. He just let himself be eaten.

After killing another piranha, Xu Xin fired a crossbow at the remaining two, causing the two injured fish to eat each other. In the end, the two piranhas, whose bodies were exposed after being eaten by each other, fell into the abyss at the bottom of the lake.

At this point, the piranhas in the center of the lake were completely eliminated.

After resolving the thorn in his heart after the beast awakened, Xu Xin felt relaxed both physically and mentally.

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

He didn't dare swim directly downwards, but instead swam back to the shallows. After all, the piranhas' range was in the center of the lake, directly above the abyss. Looking down from the center of the lake, the bottomless black abyss was truly terrifying. He was always worried that some giant beast would swim up from the abyss with its mouth wide open and devour him in one gulp.

When he reached the edge of the cave wall, which suddenly became deeper, he slowly dived down.

Xu Xin had dived before, having once experienced it while visiting the southernmost islands of China. A professional diving instructor took him to a depth of about ten meters. He also received about half an hour of basic training before diving, and after doing some research, he was well aware of the harmful effects of water pressure on the human body.

The water pressure in deep water is very terrifying and poses a threat to various organs of the body.

During the dive, Xu Xin began to assess the effect of water pressure on him. When he first experienced diving, his ears would begin to hurt after diving to a depth of three or four meters, requiring equalization. This time, however, Xu Xin didn't experience that sensation until he had reached a depth of about seven or eight meters.

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

Xu Xin began to mentally calculate. Previously, when he'd tried diving, he'd felt uncomfortable at depths of three or four meters. Now, he didn't feel that way until around seven or eight meters. This meant the scale armor had mitigated the effects of water pressure on him, more than doubling his possible depth.

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

Of course, the world records set by top adventurers are much higher, but a complete layman like him cannot even compare with professional divers, let alone world records.

He was just an ordinary person who had experienced diving. He knew very well that he had no diving experience. Without a suit, even if he could breathe underwater, the depth of more than ten meters was enough. With a suit, he could try to explore to a depth of about twenty meters.

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

He wouldn't go any deeper. Deep water was a dangerous place, and this cave was even more so. Not to mention the monsters that might appear in the water, the water pressure alone could kill him. If he went too deep, even if he could come out, the consequences would be extremely serious.

He cherishes his life and doesn't want to die.

However, the blue-level resources on the cave wall are probably only about twenty meters deep, so he can try to pick them.

After diving about fifteen meters, Xu Xin finally saw the appearance of 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 some blue-level water grass! Unexpectedly, this kind of water grass actually grew on the wall of a cave in the water 20 meters deep.

Slowly going downstream, Xu Xin finally arrived at the edge of blue-level water plants.

That’s right, it was the aquatic plants that could provide the ability to breathe underwater. They were the aquatic plants he had bought from Qin Yunlong!

"This aquatic plant probably only grows at this depth. I didn't expect that the Qin Yunlong brothers could dive to a depth of twenty meters. They are indeed professional diving coaches." Xu Xin didn't think that they could have the same purple-level suit as him. They should rely entirely on their own abilities to dive.

…or maybe they have some special underwater abilities.

Picking the water plants from the cave wall and putting them in his backpack, Xu Xin began to move along the cave wall at this depth. There were still some blue-level water plants growing on the cave wall, and he wanted to pick them all, as they were strategic resources.

Swimming along the cave wall, Xu Xin peered deeper into the cave. Gazing into the depths of this cavern gave him a chilling feeling. It gave him a profound understanding of the feeling that when you stare into the abyss, the abyss also stares back at you.

This chapter is not finished yet, please click on the next page to continue reading the exciting content!