Lin Fan dived for a distance, and found that he couldn't dive a little, this lake didn't know what the water quality was, and the buoyancy was extremely strong.

Lin Fan adjusted the internal force "afterburner" to overcome this buoyant.

He dived hundreds of meters, far exceeding the limit of ordinary people's diving.

can dive to the bottom of the lake to collect, and only a warrior can do it.

Lin Fan finally reached the bottom of the lake, the bottom was fine sand, aquatic plants, and purple coral-like things, not as lifeless as the ground.

According to the information provided by the meeting, there should be a fast-maturing reciprocal rejuvenating grass here.

However, the system searched around the vicinity and did not find any traces of the anti-aging grass.

Then, Lin Fan observed, found a direction with abundant aquatic plants, and ordered the system to look for it.

Suddenly, a warning pops up.

【System】

You are attacked by merfolk sonic waves.

Dealt 0 damage.

You are attacked by merfolk sonic waves.

Dealt 0 damage.

……

This is also expected, after hanging up, the physical body has become a mecha-like existence, how can it be damaged by sound waves, and Lin Fan himself is hidden in the spirit platform, and after sealing the spirit platform, everything is also isolated, so it is naturally safe.

Not far away, there was a huge human-like creature with a long dolphin-like tail fin on its lower body, a pair of large round eyes on its upper head, a short beak, but a high raised forehead, which has been studied to help gather echolocation and foraging sounds.

The mermaid also has two long arms and thick webbed palms, which is probably the place where it resembles a human the most, so it is called a mermaid.

The mermaid also seems to be a little ignorant, it keeps sending out sonic attacks, why this human doesn't react at all.

Lin Fan ignored the mermaid and continued to search for the Zhuyan Grass.

The merfolk also seemed to be in a hurry, and made a sound to summon their companions, and other merfolk swam one after another.

Soon after, more than a dozen mermaids surrounded Lin Fan, forming a three-dimensional encirclement net up and down, left and right.

Several of the larger merfolk were armed with weapons made of obsidian knives and guns, with sharpened edges.

Lin Fan didn't expect that mermaids had evolved to the point of using tools, but he underestimated their intelligence, if they were given thousands of years, he didn't know if they could surpass humans.

The merfolk communicated through the vocal cavity for a while, and reached an offensive strategy, and then four merfolk with black stones came forward, and the other merfolk swarmed up.

Shh

Lin Fan launched the [Sword Heart Chain], and a sword circle flashed away, and the black stone weapons in the hands of the two mermaids in front of him were suddenly cut in two.

The mermaid is also very clever, knowing that she has encountered a ruthless character, she scatters and flees in a burst.

Lin Fan just wants the mermaids to retreat, underwater is not a good place to farm monsters, and it will be troublesome to attract more mermaids.

Lin Fan swam for a while, there was not much oxygen cylinder left, and he was wondering if he should go up first.

At this time, the system pops up a prompt.

【System】

Discover the anti-aging grass.

……

At a distance that Lin Fan in the spiritual platform couldn't see with the naked eye, the system discovered the Zhuyan Grass, and the ability of the system master was really not covered.

The distance was shortened, and Lin Fan finally saw the true face of Zhuyan Cao.

A small palm-sized grass with a pearly sheen swayed in the cracks of the stones, and a few merfolk swam above the grass.

Some studies believe that the re-appearance grass can produce a certain kind of nutrients that mermaids need to survive, so there are also mermaids where there are re-appearance grasses.

These mermaids were not in a wave from before, but as soon as they saw Lin Fan, they were so frightened that they fled, they should have been notified by their companions, and these mermaids seemed to have the ability to communicate over long distances.

Lin Fan was about to take off the Zhuyan Grass, when suddenly a mermaid flew out of the blurred water curtain, pulled the Zhuyan Grass and left.

Lin Fan immediately ordered the system to catch up.

The mermaid was smaller, with a bulging chest, and appeared to be a female mermaid.

The speed of the female mermaid was much faster, and Lin Fan chased after it for a while, and then lost the trace of the female mermaid.

Lin Fan was a little painful, this task was too difficult.

Although Lin Fan couldn't see the female mermaid anymore, the system master seemed to be able to catch the trajectory of the female mermaid and continued to swim at a slow speed and unyieldingly.

After swimming a distance of several hundred meters, there was not much oxygen left in the diving bottle.

Lin Fan was about to float, when the system suddenly adjusted the angle and swam towards a few strange rocks at the bottom of the lake.

Lin Fan's heart moved, and he thought of the introduction of mermaids in the textbook, mermaids have no concept of architecture, they all live in the cracks of stones.

These strange rocks should be the nest of the female mermaid, and the female mermaid is hiding inside.

Seeing that he could catch the female mermaid and recapture the Zhuyan Grass, Lin Fan was not in a hurry to float.

Anyway, these strange rocks are not big, and it won't waste much time to search them, and if they don't find them, it's not too late to float up.

Lin Fan changed his mind, and was not in a hurry to issue an upward order, and let the system sneak into the stone crevice to search.

Lin Fan dived into the crack of the stone and was surprised to find that the inside was zigzag and twisted, leading to the depths of the ground, and there was a lot of space.

Lin Fan hesitated slightly, what if he couldn't get out if he went in, he wasn't afraid if he was on the ground, but this was deep water, and if he couldn't get out, it would be troublesome.

Rushed!

Lin Fan's heart was horizontal, could he still be afraid that a female mermaid would not succeed, in case it was very deep inside, it would be a big deal to use his vitality to break through the rocks.

Lin Fan continued to sneak, with a concave and convex stone wall at hand, the gap became narrower and narrower, and he swam dozens of meters between the zigzag stone crevices, and there was a huge rock in front of him, which was blocked and there was no road.

Lin Fan released the 'Ruler Sword', and the green light flashed, drawing a shallow trace on the boulder, this boulder is strong and thick, and it may not be a matter of time or a half to break it.

I had to go back.

Lin Fan was about to turn back, when suddenly the water and dust rippled, and a boulder crossed over, and the mud and sand fell, sealing the passage back.

Shaded by a mermaid?

Lin Fan couldn't cry or laugh, he was calculated by a female mermaid, and this mermaid's IQ is no less than that of a human being.

Lin Fan stretched out his hand and touched it, the boulder could not be sealed tightly, but at most he could only stretch out one hand, and his body would definitely not pass.

Lin Fan immediately mobilized Sancheng's internal force, activated the most powerful skill "Kenshin Chain", and slashed at the boulder.

The blue light suddenly rose, and the rubble flew one after another, cutting a nearly twenty-centimeter crack in the boulder.

Lin Fan estimated that even if he used up his internal force, he would not be able to break the boulder at one time, and he would have to make up for it a few times before he could make up for it a few times.

At this point, a warning pops up.

【System】

Lack of oxygen, blood volume -5.

Lack of oxygen, blood volume -5.

……

On the system log, the lines of red letters are shocking, the oxygen cylinder has been depleted, and the amount of physical blood is decreasing.

At this time, Lin Fan was a little panicked.

Won't die here, will you?

Lin Fan thought nervously, if he continued to bombard this boulder with all his strength, it was estimated that before he could break the boulder, he would die because his blood volume had been reduced to zero.

Not to bombard the boulder, this is the only way out.

Lin Fan thought with his not-so-smart little brain, and his blood volume was rapidly decreasing.