"Is it because of the evil spirit, or because it was soaked in demonic energy in ancient times?"

To deal with this situation, the Yama Sect also has a method.

Zhang Yan stopped lowering his breath and was preparing to add the function of filtering aura to the formation. Suddenly, when he came into contact with the filthy aura that he had absorbed into his body, the blue spark representing the assistant system swayed up and down, and suddenly became active.

With a crisp sound of "ding", the interface automatically popped up, and a line of text popped up: "I found that the host is in a polluted area, do you turn on the filtering function?"

"Turn on!" Zhang Yan didn't think about it, and shouted in his heart.

The blue spark jumped happily, the air around him rippled and flickered, and the invisible force field spread out, supporting a barrier around him.

Filtered by a qualitative and invisible barrier, pure and pure aura flows into the body.

Zhang Yan was excited.

The amount is almost not decayed, and it is no different from directly absorbing the aura gathered by the formation just now!

The Mountain Sect also has a corresponding formation to filter out the demonic energy and evil qi in the aura. However, just like desalination with semi-permeable membranes, the speed of water is far less than that of natural flow.

Using the methods of the Jieshan Sect, and even most of the sects he knew, in the current environment, the speed at which the "clean" aura was released after filtering was at least twice as slow as the speed at which the aura was gathered by the formation!

Sitting in the filtering formation to regulate pranayama is equivalent to reducing the concentration of aura around the body by half! Moreover, the formation is inconvenient to move, it is too inconvenient, and the combined effect is reduced by more than one percent!

Zhang Yan got up, jumped and moved, and flew slightly. The invisible barrier around his body is like a shadow, filtering out pure aura for him all the time and replenishing it into his body.

"Little assistant, if there are toxins in the air, can your filtration function work?"

The handwriting on the panel changed after a few moments: "Non-demonic energy polluted area, turn on the filtration function, consume a little emotional energy every minute." ”

"You just want to absorb demonic energy, right? No wonder you're so active today!" Since binding this system called Immortal Cultivation Assistant, Zhang Yan has done a lot of tests according to modern software functions. The assistant system has always shown the characteristics of being mechanical, inactive, and low in intelligence, and often does not know what to ask and does not respond to Zhang Yan's questions.

This time, he took the initiative to remind him to see the other side of the system.

The night passed, even if the true yuan was replenished, Zhang Yan still turned on the filtering function, and the demonic qi and evil qi that were still absorbed and filtered out by the system were still absorbed. It's a pity that the new changes he hoped to see, the little assistant, have never appeared.

The sun is shining, and the primeval forest in the deep mountains is a deep green in the sun.

A hundred paces ahead, the white mist was like a white wall, separating the forest on both sides.

As the sun rises and the heat intensifies, the thin mist of water that has gathered at night and in the morning has long since dissipated in this woodland, but it is still standing still. The haze of the same color as the white gauze increases very rapidly from the thinness of the edges to the thickness of the inside.

With the eyesight of the four people, they could only see the scenery less than ten feet on the edge of the white mist. Looking inside, the vision is blurred.

"Let's go, go up and have a look!" Situ Erya beckoned, and the three of them followed Edgeworth's ascend.

The light of the four magic weapons quickly turned into four small dots of different colors high in the sky.

The sky is high and the clouds are light.

Harnessing the sword light, stopping in the sky and looking down, the majestic long mountain stretches like a snake, clinging to the ground, hundreds of kilometers long.

It is said to be one mountain, but in fact it contains two mountains and a large river.

The river bank is sandwiched between two mountains, and the long mountain range rises and falls, along the bank, as if two long causeways lock the river water in the middle of the rolling waves. It is like a river that flows through the years, cutting the mountains in half.

The water from the upstream Liuhua River area flows in from the northwest and leaves from the southeast, turning into the Kunsang River that irrigates the plains of Sankun and Sangqing.

For the two countries downstream, the river is extremely important.

Originally, it was supposed to be a scene where the mountains were green and the water was like a silver belt, but it was suddenly interrupted in the depths of Changshan. In the middle, the mountains and rivers are covered by clouds and mist scattered in the mountains, and the scenery below cannot be seen.

"No wonder the monks of the Five Sects have not discovered it for so many years, if I hadn't known in advance, I would have thought that this cloud was naturally generated. Zhang Yan said secretly in his heart.

Smoke and clouds.

The large expanse of clouds under the feet of the four of them naturally flowed according to the mountain, looking like a natural formation. It is about 100 miles long, only 30 or 40 miles wide, and it is embedded in the mountains, and it is the same as several other clouds and mist.

Zhang Yan looked left and right, except for the slightly larger area, he couldn't see any difference between this cloud and fog and several other naturally accumulated clouds and mist in the mountain.

"This is the first layer of protection outside the Poison Dragon Stream. Situ Erya pointed to his feet and smiled gently: "Although it only has the power to trap people, there is no mortal threat to the monks. However, because it naturally contains the power of 'concealing the sky and covering the sea', it is not so easy to find the entrance to the second layer inside!"

"Young Master Wuma and the two junior brothers, are you interested in competing again to see who finds the breakthrough of the first layer of maze first?"

"Hahaha, the senior brother is interested, and the younger brother will naturally accompany him!"

"Hehe, you are free! Anyway, it can't be me who loses!"

Wang Shiyuan took the lead, and Wu Ma Letian's arrogant voice sounded closely, and the three of them looked at Zhang Yan together.

"What does Senior Brother Zhang mean?"

"Let's compare!" Zhang Yan shrugged his shoulders and spread his hands and said, "I'm the same as the young master of Wuma, I think the person who loses can't be me!"

"Okay! Whoever discovers a way to break through the first layer of maze first, don't trespass without permission!" Situ Erya explained a few words, agreeing on a way to communicate with each other. The four figures, turning into gold, silver, black, and purple four rays of light, rushed into the smoke and cloud barrier from four directions.

The surroundings are foggy, and you can't see your fingers.

Zhang Yan is not familiar with the two demons who used "concealing the sky and covering the sea, yin and yang to invert the flag", laying down a formation, and covering the landscape. I can only write it down in my mind, and the sand table made by Situ Erya yesterday shows the way forward.

"According to the sand table, shrouded in the formation, the fog covers this area of fifty kilometers long and more than ten kilometers wide, there should be a total of nine peaks, four in the south and five in the north. With my flying speed, I should have met a mountain peak in this small area, but why ......"

He originally planned to use a mountain peak in the southwest as a coordinate, and if he found the peak, he would naturally be able to find the river and approach the poisonous dragon stream.

Even if he deliberately controlled his speed and flew carefully, Zhang Yan's distance per hour should be about ten kilometers per hour. But up to now, two hours after entering the battle, he has not found any peaks.

A little impatient in his heart, Zhang Yan flew high.

Through the thick clouds and mist, the eyes are clear, and the mood is suddenly relaxed.

Standing outside the clouds and mist, the straight-line distance between this place and his entry point was less than a kilometer, and it was very far from the impression that he had already flown dozens of kilometers.

"I'm afraid this maze is not that simple!"

Just as he was looking around, more than ten kilometers away under his feet, a sea of clouds surged, and the purple and red intertwined sword light leaped out and rose into the sky.

"Senior Brother Zhang!" As soon as he saw Zhang Yan, Wang Shiyuan immediately shouted: "This ghost maze, it's really not simple!"

"Didn't it mean that there were elders in Shuiyun Mountain who had explored this formation, did Senior Brother Wang know the details?"

Wang Shiyuan explained: "The person in charge of exploring this formation is Liang Mucheng Liang, who is under the door of Uncle Taishi Yi Yao, although he has not yet become a Dancheng, he is also a famous person on the list of Chengdan in this mountain. This kind of realm that is not easy or difficult is usually left in the door to test the disciples. If it was just for that flag, wouldn't Uncle Liang have taken it a long time ago?"

"But since it's a test, how can we tell us everything?"

Wang Shiyuan's tone was quite angry.

The two chatted for a few words, and then split up into the fog.

Second.

The third time.

......

10th time!

Every time Zhang Yan left the fog range, he would meet his companions who had also risen high into the air like him. Sometimes it's Wang Shiyuan, sometimes it's Situ Erya.

Leaving the fog area more and more often, the time interval getting shorter and shorter.

Zhang Yan's heart became more and more anxious.

By the time he flew out of the misty area for the twelfth time and rose high into the sky, it was already completely dark.

Below the starry sky, two sword lights froze. Wang Shiyuan and Situ Erya were both there, hovering in the air, as if waiting for him.

As soon as he saw Zhang Yan appear, Situ Erya stopped him and immediately asked, "Senior Brother Zhang, have you seen Wuma Lotte all day today?"

"No!" Zhang Yan replied, shaking his head.

"I came out of the fog and rested nine times, and Senior Brother Wang came out fifteen times. Among them, I met Brother Zhang once, met Brother Wang once, met Brother Zhang and Brother Wang alone, and once the three of us flew out of the misty area at the same time. But when I talked to Senior Brother Wang just now, I realized that we hadn't met Wuma Lotte once. ”

The three of them waited for a long time, but they didn't see Wu Ma Lotte appear.

Wang Shiyuan couldn't hold his breath and said, "Could it be that he found the entrance to the second layer of the formation and went down by himself?"

"No!" Situ Erya shook his head, "It's been a day since the Poison Sect learned the news of the Poison Dragon Stream, and the elders of this sect have also greeted the Poison Sect...... I'm more inclined to have accidents!"

"What kind of greeting? This is a proper arrangement for the big guys, leaving it for the junior disciples to fight monsters and upgrade, and take treasures by the way!" Combined with Wang Shiyuan's tone revealed earlier, Zhang Yan understood in his heart, and did not say it directly, but just asked: "What kind of accident will it be?"

"The supernatural power of concealing the sky and covering the sea and the yin and yang inverted flag is related to space, but I am afraid that this first layer of maze is not as simple as I thought before. If it's not that there is anything strange in the fog, then there is also a possibility that Wu Ma Lotte touched the breakthrough of the first layer and fell directly into the second layer, without a chance to pass on the news. ”

After tossing in the mist formation for a day, Situ Erya knew that he had made a mistake in his judgment of this formation earlier, and said: "It must be that there is something strange in this outermost fog, speaking of the poisonous dragon stream formation, Uncle Liang is secretive and weird. If it is said that he concealed some news in order to increase the difficulty and temper the junior disciples, it is indeed very possible. Do it according to Uncle Liang's temperament!"

"But in this case, Wu Ma Lotte should not be in danger!"

Situ Erya shook his hand and shot out two pieces of runic paper folded into a triangle, shooting at Zhang and Wang respectively.