Qingtan is secluded and thousands of feet deep, and the water in the pool is cold to the bone marrow.

Below the bottom of the pool, the ice spirit is full of cold crystals. A small blue dragon lay on those ice cold crystals, staring at the dragon's eyes, looking at the place where Er Qing and Da Bai disappeared, revealing a look of doubt.

At this time, Erqing and Dabai were constantly shuttling among the solid stones under the cold pool.

In fact, in addition to this earth escape technique, there is actually another way, and that is to drill down a crack in a cold rock.

It's just that this method requires the use of the 'Wishful Technique' to make yourself small enough to pass through the crack in the stone that is only a finger wide.

In the end, I had to resist the bone-chilling air that kept rising in the crack of the stone.

Compared with the art of earth escape, this method is naturally not ideal.

After two or three thousand feet of diving, the two finally stopped.

What appeared in front of them was a formation, and they were still in the midst of a solid stone.

This formation is an ancient formation, even if you stand in front of it, the big white magic eye still can't detect it. This made Da Bai look at Er Qing suspiciously.

At this time, Er Qing had already opened his eyebrows and raised his eyes, looking for the flaws in this ancient formation.

In Erqing's vertical eyes, the flaws in the formation are actually easy to find.

The reason why he hesitated was just that he was memorizing this ancient formation.

Using the ancient formation method to confirm the 'current formation method', Erqing felt that he benefited a lot.

As for why ordinary Dharma eyes couldn't see through these ancient formations used to conceal aura, this was actually not surprising. Even if it is the 'Present Formation', the kind of magic array used to conceal the aura, it is actually difficult to penetrate it with ordinary magic eyes, otherwise, what is the hidden power?

In addition, the power of the Dharma Eye is also closely related to one's own cultivation. If the person who set up the formation is not cultivated enough, then even if he sets up a hidden array, it will be easy for people to easily see through it.

Obviously, the people who arranged this ancient formation had much higher mana cultivation than Er Qing and Da Bai. If it weren't for Erqing's vertical eyes, which could see through the essence of all things, it would be difficult to find this place.

Yes, the Jiao Demon King had never discovered this place at the beginning, and Erqing was not surprised at all now.

As for Xiao Nezha, the guy's attention was not on this at all.

Although Erqing also used his eyebrows to investigate this cold pool at the beginning, because Xiao Nezha was urging him tightly at that time, he didn't take a closer look, so he missed it.

Compared with the beginning, now his cultivation has risen greatly, and the vertical eyes between his eyebrows have also grown a lot. Coupled with some doubts in his heart, after a closer look, he finally found the clue.

For a long time, Erqing entered the battle with Dabai.

It wasn't long before the two of them appeared in an underground cavern.

Shake your head and look around, the diameter of the cave is dozens of zhang wide, the stalactites are staggered, such as the halberd arrangement, like the sword hangs high, densely packed. The blue light is clear and quiet, and the cold air lingers to the bone.

Although the caves are naturally generated, there are also traces of man-made beings.

This is not surprising, seeing the ancient formation outside, you can know that there have been monks here who have stopped.

There is a stone room in the cave, a stone bed in the room, a stone futon, and nothing else. Outside, there is a cold pool, the width of the pool is only three feet, and it is cast by bluestone.

There is a little clear spring in the pool, and the cold air is like smoke and fog.

Da Bai's eyes were attracted by those few clear springs.

Because of those few clear springs, like living creatures, there is no wind and automatic, like elves dancing and jubilant in the water, like whispering and singing. The feeling is like a dream, and it is difficult to distinguish the real from the fake.

Let Dabai take it for a while!

And Erqing's gaze was on the three-foot cold pool cast by bluestone.

The surface of the three-foot cold pool was crawling with countless inscriptions.

Those inscriptions were very similar to the runes in the Ancient Formation and the Ancient Runes. Erqing found many such inscriptions in the collection of the Dragon Palace in the East China Sea.

After a long time, Da Bai came back to his senses, "Senior brother, this water is the essence of the innate water element?"

In her opinion, only the innate essence of the water element can give birth to spiritual intelligence, just like the spirit in the water, can sing in such a whisper, can be like life, and dance without wind.

Xu Dabai's voice disturbed them. Therefore, the clear spring in the cold pool instantly returned to calm, like a pool of stagnant water, but it was clear and transparent.

Erqing shook his head, touched his chin, and said, "Amazing! I don't know who the original owner of this grotto is? This is the water of Taiyin, not the essence of Shuiyuan. ”

The qi of Taiyin is actually the same as the 'qi of yin' in the two qi of yin and yang.

Erqing, who has been baptized by yin and yang, can naturally see through the few clear springs in this cold pool at a glance.

Er Qing was just impressed by the means of the people who laid down this array.

If you look closely, in the entire cave, in addition to the array of hidden aura, there is also a large array.

This array was centered on the cold pool, or the eye of the array, and stretched in all directions, just covering the place where the qi of a leyline flowed.

The energy of the leyline, or the dragon vein.

And this leyline seems to lead to Huaguo Mountain.

Huaguo Mountain is known as the place where 'the dragon of the three islands and the ancestral veins of the ten continents' converges. And this leyline should be one of the ten ancestral veins.

And this array was to intercept part of the Extreme Yin Qi from one of the ten ancestral veins.

That part of the extreme yin qi gathers here, and in this cold pool, it gathers qi and turns water.

It is precisely because of these inferences that Er Qing feels that the person who sets up this formation is really a big deal.

And the clear spring in this cold pool may be called the 'yin spring'.

Of course, there is a difference between this 'Yin Spring' and the 'Yin Spring' in the Netherlands.

The 'Yin Spring' in the Netherlands, although it is said to be extremely yin, has a rotten aura, but to the living, it is a poisonous thing, which will corrode the vitality of the living.

And this 'yin spring' is beneficial and harmless to the living.

Of course, the premise is that the exercises and physique that this person cultivates cannot be without water attributes.

However, this kind of problem is not a problem for monks in the Five Qi Dynasty Yuan realm. It's just because the monks of this realm need to practice all five attribute mana.

But the one who can really get great benefits here is a monk like Erqing who knows how to refine yin and yang. For him, this yin spring is a great tonic.

Of course, if the little dragon girl was here, it was estimated that she would pounce directly.

Er Qing told Da Bai his guess as he took out a jade bottle and put the clear spring in the cold pool into the bottle. Then carefully observe this 'Yin Interception Great Array'.

Dabai walked to the stone chamber, hoping to find a clue in it, and see if he could guess the owner of the room.

However, unfortunately, in the stone room, there is nothing except the stone bed and the stone futon.

And how can you deduce who the original owner of this room is?

The only thing that is certain is that the original owner of this room should be a cultivator who knows the two qi of yin and yang very well, and may even be a person who practices the exercises of the Taiyin one vein.

Maybe it's some immortal god in the sky, or it's a disciple of a certain immortal god.

Like the Taiyin Star Monarch in the Nine Yao Star Monarchs, what he cultivates is the immortal method of the Taiyin lineage.