After leaving Chu Wuye, Lu Xuan simply didn't even return to his residence, said goodbye to his senior brothers, prepared food, clothes and other affairs, and went directly down the mountain while it was dark and touched in the direction of Dilung Mountain.

There are still remnants of the magic talisman that Shi Niang gave him, and they are all stored in the Qiankun bag. After using two Shenxing talismans in a row, Lu Xuan had already come to the edge of the Earth Lung Mountain, which was dozens of miles away.

Dilung Mountain is located in the south of Changmen, among the three branches of the Lingyun Sect, it covers the widest area, the most secluded scenery, and it is also a blessed land that can almost be compared with Tianmen Peak. Although it is not as standout as Tianmen Peak, towering into the clouds, but the Dilung Mountain is a whole mountain range, surrounded by mountains and peaks, plus the two big rivers of Shaoyin and Shaoyang go from west to east, like two jade belts wrapped in a splendid world.

The mountain borrows the water potential, and the water borrows the mountain potential, compared with the Changmen Tianmen Peak, it is another paradise.

At this time, the sky was still moonlit and starry, Lu Xuan stood on the top of a high mountain and looked into the distance, and saw two large rivers several miles wide rolling away from west to east, as if two giant dragons surrounded the Earth Lung Mountain, and the water at the foot of the mountain was surging, and a layer of thick water vapor was like a mist.

Sure enough, it is worthy of the lungs of the earth, and the name is well deserved.

It's a pity that this beautiful place is the same as Nagato.

Lu Xuan sighed for a moment, and then plunged into the dense jungle. Sneaking forward, a moment later they were at the foot of the Lungs Mountain.

Looking up, although it was still late at night, there were dotted lights everywhere on the mountain, and many pavilions and pavilions were faint, but they were more prosperous than Nagato.

Lu Xuan didn't look too much, but quietly followed the Shaoyin River and touched the southwest direction of Dilung Mountain.

According to the notes of the predecessors, the entrance to the underground river should be at the bottom of a toad-shaped boulder in the southwest of the Lung Mountain. It's just that although this Lung Mountain is not as majestic as Tianmen Peak, it is also dozens of miles in radius, and only the general direction is naturally not so easy to find a place. Lu Xuan searched for the three poles of the sun from the middle of the night, and finally found a huge rock four or five feet high in the dense jungle, shaped like a toad.

It had obviously been a place that no one had been here for a long time, and the rocks were covered with a thick layer of moss, and all around were covered with vines, and there was a cold, damp smell of it.

Lu Xuan tried to peel off the vines and moss, and found that a narrow hole was revealed in the belly of the "toad". The entrance to the cave looked like an ordinary crack to the eye, but when you looked inside, you could see that it was extremely deep, with a faint rumbling sound of water and damp water vapor rushing in your face.

There is no doubt that there is an underground river down there.

This is it.

Lu Xuan suddenly breathed a sigh of relief, it seemed that the travelogue of the predecessors was not faked, since the toad-shaped rocks and underground rivers existed, then the fire vein was obviously real. Without hesitation, he lowered his head and burrowed into the crevice, and after walking through the cat's waist for a long time, he felt that the cave was like a twist and turn, all the way to the ground. I don't know how long it took, the cave became much more open, and Lu Xuan's eyes had already adapted to the darkness at this time, so he quickened his pace and ran down.

In the dark, Lu Xuan estimated that he had walked down for at least ten miles, and the roar of the river in his ears became more and more deafening, and the water vapor was already so abundant that it was unimaginable, and it was not much better than the Xuanfu Forbidden Land.

When he arrived here, Lu Xuan couldn't wait to see this underground water vein.

Having practiced the true recipe of the Jade Pond since childhood, Lu Xuan has a natural affinity for places with plenty of moisture.

I don't know how long it took, Lu Xuan suddenly felt that his eyes suddenly opened up, and even though he felt a wet and cold wind whistling in front of him, he couldn't help but shiver. He looked around, but he could only see darkness, only that he should have come to an unusually open space, and there was a sound of waves not far in front of him, and there was an underground river, which should be close at hand.

Lu Xuan took a deep breath, gathered his true qi and eyes, and saw that his eyes emitted a faint glow, and he quickly saw everything in front of him.

It was a huge underground cavern, a hundred feet high, several miles wide at its widest point, and the rock walls of the cave were rocky and covered with bronze moss. Just a few dozen zhang away in front of Lu Xuan, there was indeed a wide and majestic river, rolling away along the cave from west to east. The river was tumbling and splashing like ice crystals, like a silver dragon roaring away, with an inexplicable coercion.

According to the notes of the predecessors, Lu Xuan knew that this underground river was only an underground tributary of the Shaoyin River, and from then on, five or six miles to the east, this underground river would converge with the underground tributaries of the Shaoyang River, and there was the best place for him to cultivate the true trick of the Jade Pool.

Along the riverside tidal flats, Lu Xuan groped all the way west, and after a while, he heard a tsunami-like sound of mountains and mountains.

When he arrived, Lu Xuan was overjoyed, stepped up his pace, and arrived at a more open space in a blink of an eye.

This is a huge cave with no top, a radius of several miles, not far ahead, another underground river rolls in, two underground rivers converge here, collide, as if two silver dragons angrily tear together, and finally the two silver dragons merge into one, into a larger and majestic dragon, roaring towards the dark depths of the east. At the confluence of the two long rivers, there is a rocky platform like a hill, the river water hits thousands of piles of snow at the foot of the rock, and the rolling snow-white waves wrap the huge rock platform, and from a distance, it looks like a huge jade with ice and jade.

This is it.

Lu Xuan didn't need to deliberately comprehend it at all, he could sense that the aura of the water system here was simply more than he imagined.

Although the water system aura of the Xuanfu forbidden land is sufficient, there are still traces of artificial axes and chisels, but here, the essence of the two long rivers of less yang and less yin converge here, yin and yang are united, and they return to chaos.

Lu Xuan was overjoyed, and first flew and jumped onto the rock platform.

The top of this platform has been washed flat and smooth, with a radius of dozens of zhang, and this is the place where the three rivers meet, and the water vapor is the most abundant, so it is the first choice for refining the Xuanfu Spirit Gathering Array. Lu Xuan hovered on the rock for a moment, feeling very satisfied, but he didn't rush to refine the formation, but raised his head and walked around.

According to the notes of the predecessors, the place where the three rivers converge is the entrance to the underground fire vein.

However, there are no fingers to be seen here, although Lu Xuan is not an ordinary person, but he can't find any clues quickly. He was about to go to the river to look carefully, when he suddenly heard a loud snort, and immediately saw that under the rock wall in the north, suddenly a blazing tongue of fire rose into the air, and the tongue of fire erupted dozens of feet high, with a strong sulfur smell, like the fire of the Nine Shadows Yellow Spring, to burn this piece of heaven and earth.

The tongue of fire swallowed for a moment, then vanished, and the cold water vapor around it quickly dispelled the heat and sulfur as if nothing had happened.

Fire Vein!?

Lu Xuandeng's eyes widened, but he still stood on the rock and did not make a rash move.

The fire vein was obviously still under this underground water vein, but Lu Xuan didn't expect that the fire vein to be so fierce.

Where the tongue of fire spouts, there should be a crack that can go directly to the place where the underground fire veins are, but Lu Xuan is not the incorruptible body of King Kong, if he is halfway to catch up with the comeback of the tongue of fire, he is afraid that his kung fu will be wiped out in the blink of an eye.

After thinking about it for a while, Lu Xuan gave up the idea of exploring the fire vein, and wanted to see the frequency of the fire tongue before making a plan.

After waiting for a long time, the tongue of fire did not appear again, and Lu Xuan simply began to prepare for refining the Xuan Fu Gathering Spirit Array.

Cultivation is not something that can be achieved overnight, and shaping immortal bones is a long way, Lu Xuan has time to find out the temper of the underground fire vein, and if he is not completely sure, he must not risk his life.

Compared with the first refining array, Lu Xuan was already proficient, he took out the rune paper and pen, unfolded Yu Bu, and began to refine the Xuanfu Gathering Spirit Array. Compared with the last time, Lu Xuan at this time was more at ease, the means of refining the formation were more proficient, and the quality of each talisman was the best of the high-grade spirit runes, and it was conceivable that when this second Xuan Fu Gathering Spirit Array was completed, the effect would inevitably exceed that of the one in front of the Guanyun Grass Hall.

While refining the formation, Lu Xuan always paid attention to the movement under the rock wall in the north. In the past two days, he has basically figured out the temper of the tongue of fire, and every other hour, the tongue of fire will make a comeback, not for a long time, not short, very regular. This made Lu Xuan feel a little relieved, and when he had refined the Xuanfu Gathering Spirit Array, he planned to test it to see if this underground fire vein could be used by himself.

This time the formation was refined, and Lu Xuan was completed in five days.

When he drew talismans in the void and opened the formation, Dao flames suddenly rose on the rock platform, and thousands of shimmering starlight runes were deeply imprinted on the hard rock surface, and the surging waves washed the formation, as if a white cloud surrounded the bright starry sky, such a scene was simply beautiful.

Lu Xuan couldn't put it down, and carefully looked at his masterpiece for a long time, and then he condensed and realized.

At that moment, the mysterious feeling came as scheduled. Lu Xuan's divine consciousness accompanied by the power of the formation seemed to give birth to countless tentacles, piercing through the thick rock formations of the Earth Lung Mountain. He could feel the endless innate aura filling all around, especially beside him, the water system aura of the two great rivers of less yin and less yang was even more abundant to the extreme. Lu Xuan could feel that a large amount of spiritual energy was swarming like a long cloud, and in the blink of an eye, it seemed that a heavy rain had fallen in the center of the formation, and countless condensed innate spiritual qi condensed into a mass was frozen in mid-air, crystal clear, as if the stars were twinkling.

Sure enough, the effect of this Xuanfu Spirit Gathering Array was at least thirty percent stronger than the previous one.

Lu Xuan was overjoyed, and hurriedly sat down cross-legged and carried the true recipe of the jade pool.