The entire spring mouth was surrounded by dense fog and couldn't see clearly, Qin Feng took out the long-handled net pocket again and scooped it into the spring, but it was beyond Qin Feng's expectations, the spring mouth that could see the bottom last night suddenly made Qin Feng return in vain, the pole more than one meter long did not touch the bottom, Qin Feng doubled the length again or did not touch the bottom, which made Qin Feng call strange.

"What's going on?" He took out the long-handled net pocket and put it away, Qin Feng asked Mo Yue.

"It's strange, do you have any detectors? Drop it down and see how. Mo Yue is also more and more accepting of the application of these technological products, which is also a learning process for her.

"Well, I want to think about it...... Yes, there is a kind of light bionic jellyfish robot in the weapon base, which was used for infiltration detection in the past, and it is just used here. After speaking, Qin Feng took this thing out of the ring.

This jellyfish is very finely made, just like a real jellyfish, only the size of a palm, Qin Feng gently put it into the water, and then operated it on the portable operator.

"The quality of the water is very high, rich in minerals, and the temperature is 27 degrees Celsius, but it is also much warmer than the water in the nearby lake, and there may be a heat source acting on the spring water." Qin Feng looked at the analysis values displayed on the monitor and said.

"The depth of the dive is increasing, and at one moment it has exceeded ten meters, well... The channel turned to the right and gradually became wider, and continued on its way. Qin Feng saw the changes in the gushing channel through the video collector of the mechanical jellyfish, the inner wall was still very smooth, and it didn't feel like it was naturally formed, but he sampled a little inner wall with the tentacles of the jellyfish, and after analysis, he came to the conclusion that they were all silicate minerals, and the structure was similar to mica crystals.

The jellyfish robot continued to go up for 200 meters, the slope gradually decreased, and there was a feeling of gradually rising to the ground. Eventually, the robot surfaced from a small lake, and Qin Feng saw through his electronic eyes that a huge cave appeared on the monitor, and the hole was not pitch black, but some dots of light illuminated the inside of the huge hole.

"Sister Mo Yue, what do you think?" Qin Feng's brows furrowed into a Sichuan character, looking very confused.

"This passage is definitely opened intermittently, and there is a way to seek wealth and danger, how about exploring it." Mo Yue is also a master who is not afraid of heaven and earth, and he can't stop picking up Qin Feng at this time.

"Let's first look in the direction of the jellyfish robot, and if there is an entrance, we will go straight in, and then we will make plans." Qin Feng made up his mind that he couldn't let go of this opportunity.

Thinking of it, he immediately did it, Qin Feng's range of exploration at this time was a hundred meters, but he was not afraid of going too far beyond the range to be affected by the fog and not being able to distinguish the direction.

However, the exploration on the ground still did not have good results, two hundred meters away there was already an abrupt mountain, the rock was very hard, Qin Feng did not find any place for people to enter after looking for a long time.

So Qin Feng could only return in a huff, and returned to the spring mouth of the Seven Killing Stars again, Qin Feng directly gave himself a trick to avoid water, and then took a big breath of air and drilled into the spring, the more than ten meters of progress were slightly narrow, but it was not unbearable, with Qin Feng's physique and lung capacity, these hundreds of meters of diving are trivial, if you want Qin Feng to stay in the water for an hour, if you want to cultivate again, you can even extract oxygen directly from the water through the skin.

The higher a person's cultivation is, the more beyond the scope of human beings.

Soon Qin Feng walked out of the lake in the cave where the jellyfish robot stayed, and because of the water avoidance trick, Qin Feng was not wet on his body, so he didn't have to go to the trouble of changing clothes.

"Qin Feng is here to be careful, since that wellhead is attributed to the Seven Killing Stars of the Six Stars of the Southern Dipper, just like his implication, there may be accidents or dangers, let's come here to hunt for treasures, and our own safety can't be sloppy." Mo Yue reminded that although she knew Qin Feng's character, she had always been smooth sailing, and if she was arrogant in the end, she was still prone to failure and unnecessary losses.

"Don't worry, I understand." Qin Feng could already see clearly in the darkness as if it were day, so there was no pitch black appearance here.

Putting away the robot jellyfish so that he could continue to use it, Qin Feng began to carefully examine the cave. The light emitted in the cave was a shimmering insect, which was probably mutated, Qin Feng didn't have any impression of this thing, he picked one and didn't find anything offensive about this thing, so he didn't pay attention to it anymore.

There is a lot of space here, the water surface occupies two-thirds of the area, it is very wet, Qin Feng walked along the water's edge to the depths of the cave, all the way are craggy strange stones, revealing all kinds of hideous appearances, if the timid people will definitely not dare to walk alone here.

After walking for five minutes, a crack in the mountain that only allowed one person to pass appeared in his eyes, Qin Feng did not hesitate to get in, fortunately, although it was narrower, the height was still okay, at least there was no need to bend down to move forward, which was still bearable.

In the dark and narrow space, Qin Feng walked slowly, at this moment, it seemed that all the connections with the outside world had been cut off, and time seemed to have no meaning, Qin Feng felt that he had been walking for a long time and felt that time was very short, this illusion made him stop uncontrollably.

"Do you feel it?" Qin Feng asked Mo Yue.

"Well, the cathode energy here is very strong, which may give people the illusion, but there is no harm, and this road has not branched off." The cathode energy affected the divine consciousness and spirit, Qin Feng was careful to go on the road again, he didn't want to go here.

The hard work paid off, Qin Fengyou walked for a quarter of an hour before he walked out of the crack again, only to see a huge cave appear in front of him.

"It's ...... A relic! Something suddenly flashed in Qin Feng's mind, yes, this feeling was just like the feeling when he participated in the mission that led to the annihilation of the Wind and Thunder Squad, full of unknown and coercion. At the same time, it was very safe, at least for the time being.

"You guessed right, this is really a place abandoned by someone, so even if the mouth of the Southern Dipper Six Stars outside has a provenance, it is really man-made, so it is not some kind of magic work of nature." Mo Yue felt more and more interesting, and the ruins here indicated the cultivation civilization that had existed since ancient times.

In this way, as long as Qin Feng relies on more relics, he may get more benefits, and he can also explore more secrets, and only with the first move can he defeat any enemy that appears.

Looking at the quaint and atmospheric hall, Qin Feng's heart became hot, and the unknown attracted him again.