Xia Ruofei, who had already thought of retreating, immediately perked up.
He could sense that the Jade Leaf was reacting, which meant that he wasn't far from the Realm Stone. He adjusted his breathing according to the Great Dao Sutra and continued diving with all his might.
Although the strong flashlight's range was still filled with water and he couldn't see the bottom, Xia Ruofei was very motivated.
The pool water became colder and colder. Xia Ruofei's teeth began to chatter involuntarily.
To be able to make a cultivator feel so cold, the temperature of the pool water was obvious.
Under such circumstances, the expenditure of Quintessential Energy was astonishing. Even though Xia Ruofei cultivated a top-notch Great Dao Sutra cultivation technique and his Quintessential Energy was much denser than cultivators of the same cultivation level, he couldn't withstand such expenditure. Gradually, he felt that his strength was lacking.
Of course, at this point, he definitely wouldn't give up so easily.
Xia Ruofei had already made up his mind. If he really couldn't hold on any longer, he would enter the Ring-Tu space. That way, not only could he take a breath, but he could also use the difference in the flow of time in the Primordial realm to meditate and recover his Quintessential Energy. He believed that the Spirit Map Scroll wouldn't be damaged in such an extremely cold environment in a short period of time. Similarly, it wouldn't deviate too much from its original position.
However, Xia Ruofei didn't immediately take out the Spirit Map Scroll. He still wanted to challenge his limits.
After diving for about fifty meters, the surrounding water pressure was already extremely astonishing. If it were an ordinary person without professional training, their lungs would probably have been severely damaged.
Just as Xia Ruofei gritted his teeth and prepared to continue diving, the white Realm Raccoon in the space squeaked and gestured to Xia Ruofei.
Xia Ruofei had been maintaining a mental connection with the Ring-Tu space, so he naturally sensed the signal the white Realm Raccoon sent him immediately.
"Swim to the left?" Xia Ruofei said in her heart.
The white Realm Raccoon gestured for him not to continue diving but to swim to the left. Xia Ruofei was overjoyed. Did this mean that he was close to the World Stone?
In any case, swimming horizontally was at least better than continuing to dive. Xia Ruofei judged that if he continued to dive down, he would only be able to dive down 50 meters at most. Whether it was the water pressure or the low temperature underwater environment, it should reach the limit of what his body could bear. At that time, even if he hid in the space to recover his Zhen Qi, it would be difficult for him to dive any deeper.
If he swam horizontally, he could rely on his internal breathing to persist for a long time. Even if he couldn't persist, as long as he took a breath in the space, he would be able to persist underwater.
Originally, Xia Ruofei thought that the World Stone could only be found by diving to the bottom of the pool. His heart was beating like a drum in this astonishingly deep pool. He didn't know when he would be able to see the bottom.
Xia Ruofei immediately turned his body and swam to the left. At the same time, he shone the flashlight in his hand forward, trying to see the situation as clearly as possible.
The bottom of the pool was much bigger than Xia Ruofei imagined. He swam to the left for at least 20 to 30 meters, but he still couldn't see the wall of the pool.
It was obvious that it was the shape of an inverted funnel. Because from the shore, the pool didn't seem that big. Instead, it got bigger the deeper he went.
Xia Ruofei could feel that the Induction Jade Leaf on his chest was getting hotter and hotter. This made him feel a lot more at ease, because it meant that he was getting closer and closer to the World Stone.
The white Realm Raccoon in the space also became more and more excited.
Xia Ruofei continued to swim forward for 20 meters. Finally, under the illumination of the flashlight, he saw the wall of the pool with strange rocks. And about two meters below him, there was a black hole.
"Squeak! Squeak! Squeak! "The white Realm Raccoon jumped and cried, using its forelimbs to gesture.
"You want me to enter that cave?" Xia Ruofei asked with his mind.
The white Realm Raccoon immediately nodded like a chick pecking at rice. If a little girl saw this, she would definitely be flipped over by its cuteness.
Xia Ruofei didn't hesitate. His legs quickly kicked the water, and his body dived down a bit, swimming towards the hole.
Under the illumination of the flashlight, Xia Ruofei gradually saw the appearance of the hole.
It was about one meter in diameter. It looked like a very regular circle, and the edges were very smooth. This was completely different from the wall of the pool he saw earlier.
There was no doubt that this hole was dug by man.
What kind of person could dig such a regular hole in the water that was almost 200 meters deep? Xia Ruofei couldn't help but be secretly amazed.
He didn't dare to be negligent. He had already spread out his mental power. What little True Qi he had left was also stirred up, ready to deal with the unknown danger at any time.
It was pitch black inside the cave, and he couldn't see what was going on inside. It was also difficult for him to extend his mental power into the cave. This was very similar to the situation he encountered in the strange white fog before he arrived on this island.
Xia Ruofei changed to holding the flashlight in his mouth. His right hand clenched the military dagger, and his hands forcefully paddled back. At the same time, his legs also moved in coordination. His body lightly paddled through the water and directly entered the narrow hole.
He felt as if he had passed through an invisible membrane. The inside of the hole was actually dry, and there wasn't even a drop of water.
Xia Ruofei still maintained his diving posture. For a moment, he didn't have any preparation and directly fell to the ground of the hole.
Xia Ruofei opened his mouth in surprise. The flashlight fell to the ground, and the light danced wildly in the hole. Only then did he wake up and quickly reached out to grab the flashlight.
The diameter of the hole was only about one meter. It was difficult to turn around inside.
Xia Ruofei grabbed the flashlight and shone it behind him. At the same time, he tried his best to turn his head.
He saw that there was still a slightly swaying pool of water at the entrance of the hole. However, this pool of water seemed to be blocked by a layer of transparent cover. It didn't flow into the hole at all.
Xia Ruofei guessed that this should be the effect of the formation. However, he was still very surprised.
One must know that the water depth was close to two hundred meters. The water pressure was amazing. To be able to block the pool of water outside and still be able to easily pass through, this formation was quite remarkable.
Xia Ruofei had been holding his breath since he entered the hole. After entering the hole, he tried to exhale the turbid air, and then gently took a breath.
He suddenly found that the air in the hole was quite fresh, and it seemed that the concentration of Spirit Qi was quite high. Although it couldn't be compared to the environment in the Ring-Tu space, compared to the ordinary places in the outside world, this place could be considered a treasure ground with rich Spirit Qi.
Xia Ruofei was relieved and took a few deep breaths. He felt a lot more comfortable.
Although he could rely on the "Dao Formula" to maintain the state of internal breathing underwater, breathing was a human instinct. After not breathing for such a long time, he subconsciously felt very suffocated.
Now, this suffocating feeling was finally gone.
Xia Ruofei didn't stay at the entrance of the hole for too long. After a short rest, he began to move forward.
The diameter of this hole was only a little more than one meter. An adult could barely pass through it. Moreover, they had to crawl forward.
If it was someone with claustrophobia, they would probably go crazy after staying in such an environment for a long time.
Xia Ruofei's psychological quality was very strong. He still crawled forward very calmly.
This hole had a downward slope, and the temperature in the hole was also very low. Xia Ruofei even felt that it was a bit colder than when he was in the pool of water.
He clenched the dagger in one hand and didn't dare to withdraw his mental strength. In this hole, his mental strength was also greatly suppressed. He could only detect about three to four meters in front of him.
As he continued to crawl forward, Xia Ruofei felt that the hole was gradually becoming wider and wider. The cramped feeling was also getting lower and lower.
Of course, the temperature in the hole was still very low. The deeper he went, the lower the temperature became.
After another hundred meters, the width of the hole could already accommodate an adult bent over to walk.
Xia Ruofei also sat up from the ground and leaned against the wall to rest for a while.
After all, he had been crawling in the narrow tunnel. In addition, he had to continuously use his True Qi to resist the cold. He was also very tired.
Xia Ruofei took out a bottle of Spirit Pool Water from the Spirit Heart Flower's petals and drank it. Suddenly, his mental strength and True Qi recovered faster.
He sat for more than three minutes, then got up and bent over to continue moving forward.
The hole continued to widen. After moving forward for less than fifty meters, Xia Ruofei discovered that the hole had become at least two to three meters in diameter. Not only was it a lot more spacious, but it was also high enough for him to straighten his back and walk normally.
This made it a lot easier.
Xia Ruofei held the dagger in his hand and carefully moved forward. His mental strength was also constantly probing the surroundings. He was always on high alert.
The inside of the hole was very quiet. Xia Ruofei could clearly hear his own footsteps and the thumping of his heart.
The Sensing Jade Leaf in front of his chest was a little hot. This meant that the Boundary Stone was nearby.
The hole in the hole was slightly downward. Xia Ruofei judged that he was already more than two hundred meters away from the ground.
Finally, after moving forward for another sixty to seventy meters, Xia Ruofei saw a stone door.
This cyan stone door should be made from a huge piece of cyan stone. It gave off a simple and unadorned aura. It was seamlessly connected to the entire passage. He couldn't see any switches or handles.
Xia Ruofei walked closer and quickly discovered that the stone door was engraved with mysterious patterns. They formed a complete array diagram.
He analyzed it for a while and his heart calmed down a lot. This array diagram was of the same origin as the boundary array diagram at the edge of the pool. Although the two arrays were completely different, the idea of setting up the array diagram was the same.
Xia Ruofei had studied the boundary array diagram at the edge of the pool for an entire day and night. He had already thoroughly understood the principles of the array diagram. Now, it was much easier to analyze this array diagram.
He faintly knew that this array diagram was the key to opening the stone door.
Of course, if he wanted to analyze this array diagram, he would also need a lot of time.
Although it had been almost half an hour since he entered the pool, the giant python might have returned to the edge of the pool. Even if it couldn't enter the array diagram, it might still stay outside the array diagram. However, now that he had already come this far, Xia Ruofei couldn't care less about the giant python. He had to open the stone door with all his might first.
In any case, even if he went back the way he came, the giant python might have already returned. It might even be caught red-handed.
Sensing that the jade leaf was already boiling hot and the boundary stone was close at hand, Xia Ruofei naturally knew what to do.
Now was not the time to think about the giant python. He could only calm down and analyze the array diagram on the stone door. Only then could he open it as soon as possible. The more anxious he was, the more counterproductive it would be.
Xia Ruofei quickly memorized the entire array diagram under the strong flashlight. Then, he sat cross-legged in front of the stone door and put the flashlight aside. He closed his eyes and analyzed the array diagram in his mind.
As time passed, the principle of the array diagram became clearer in Xia Ruofei's mind.
Arrays were also divided into different schools.
Obviously, Xia Ruofei's analysis and deciphering of the array diagram at the edge of the pool was of great help to him in analyzing the array diagram in front of him.
The array patterns formed the basic array diagram, and the basic array diagrams formed the array diagram.
Xia Ruofei still started to analyze each basic array diagram, and then made a reverse inference through the connections between them.
Although he was doing the same work, the efficiency this time was much higher than the last time he analyzed the array diagram.
He sat for about an hour before he suddenly opened his eyes. A relaxed smile hung on his face.
"It should be like this!" Xia Ruofei muttered to himself.
He had just deduced a few times in his mind and had basically confirmed the result of his analysis.
Xia Ruofei stood up confidently and returned to the stone door.
He had a confident smile on his face. He reached out his hand and pressed down on a certain node of the array diagram. At the same time, he exhaled a bit of vital energy.
Then, Xia Ruofei's finger quickly tapped on the array diagram, pouring a wisp of vital energy each time.
The whole process took about ten seconds.
When Xia Ruofei tapped the last point, the entire array diagram seemed to be lit up. Every array pattern emitted a dazzling light, and this bright light quickly flowed on the array diagram.
At the same time, a series of "ka ka" sounds were heard, and the cyan stone door began to slowly rise.
The stone door seemed to be very heavy, and the speed of its rise was quite slow.
Xia Ruofei could see a faint cyan light through the gap below the stone door.
After more than two minutes, the stone door rose to the top. With a "ka ka" sound, the stone door seemed to be locked and hung steadily above, revealing a two-meter-wide and three-meter-high doorway.
Xia Ruofei walked in with a heart full of expectation.
When he passed by the doorway, he looked up and found that the stone door was more than a meter thick. He couldn't help but suck in a breath of cold air. This was simply the legendary Dragon Breaking Stone! It was almost impossible to open this door by relying on brute force alone.
After passing through the one-meter-deep doorway, Xia Ruofei suddenly opened his eyes wide, revealing an extremely shocked expression …
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