Bu Wentian took Li Muran and the Thousand Illusion Fairy and flew to the depths of the Valley of Ten Thousand Souls.

The sky was getting darker, and the surrounding gloomy aura was getting heavier and heavier, and even the dense forest stone valley below him gave people an eerie feeling.

Not long after, the group came to the vicinity of a piece of ruins.

This ruin is a huge deep pit, in a very regular circle, about ten miles in diameter, about 100 zhang deep. Among the ruins, there are countless dark red gravel, and some of the rubble surface still has some incomplete magic patterns.

But these are not the most terrifying, Li Muran and others saw at a glance that among the ruins, there were huge humanoid bones scattered everywhere, some only had a head, and some were a tibia, and countless bones were chaotically piled up in this deep pit, hidden in the rocks.

"What kind of place is this?" Li Muran frowned, and the Thousand Illusion Fairy also frowned slightly, and couldn't bear to look at it more.

"This is the ruins of the Blood Sacrifice Array. Bu Wentian said: "More than 10,000 years ago, the army of the Blood Demon Clan invaded here on a large scale and exterminated the Troll Clan monks here, these bones were all Troll Clan monks who were brutally murdered at that time, after they were killed, their bodies were placed in the Blood Demon Clan's special blood sacrifice array, and then with the help of the power of the formation, the blood pill needed by the Blood Demon Clan was refined. ”

"In the Valley of Ten Thousand Souls, there are at least hundreds of ruins like this Blood Sacrifice Array, and there are thousands of bones in each of them! Now that the Blood Sacrifice Array has also been abandoned, these Blood Sacrifice Formations have also been destroyed. But the bones, some of which were reduced to ashes, and some of which remained in the pit, were left unheeded. ”

Bu Wentian continued: "Probably because the yin qi of this bone pit is particularly dignified, it is easy to attract the gathering of yin beasts. In the lower part of the world, two fourth-order Yin Beasts were found hiding in the cave here. ”

Li Muran nodded: "Then ask Bu Daoyou to lead the way." ”

The two of them immediately followed Bu Wentian and flew into the huge pit.

In the huge pit, the rancid smell is high to the sky, and the wind is gusting, and ordinary monks will naturally avoid this place. If the Yin Beast is hiding here, it will be difficult to be detected. However, if it is a monk who is familiar with the habits of the Yin Beast, he will not let this place go, and will definitely search carefully.

Li Muran and the Thousand Illusion Fairy frowned, if it weren't for the fact that they were going to get the best Yin God Pill, they didn't want to come to this kind of place.

Bu Wentian soon led them to the entrance of the cave, which was about a zhang Xu Fangyuan, which was covered by a pile of rubble, and it was not easy to find.

Li Muran and the others were all high-level monks, and they didn't need to remove these chaotic stones at all, they each turned into a stream of demonic light, and flashed directly into the cave from the gap in the chaotic stones.

The yin qi in the cave is even worse, making the monk's divine thoughts difficult and far, and this cave is very deep, Li Muran and the others cannot directly use their divine thoughts to probe the end of the cave.

The group cautiously walked to the depths of the cave, deeper and deeper into the ground, and the yin qi around them became heavier and heavier, and the stone walls around the cave were wet and damp.

Li Muran's heart sank, it stands to reason that in this damp and dark environment, thick moss will grow on the stone walls, but the stone walls here are actually wet and smooth rocks, and no moss grows.

Li Muran was about to ask, but Bu Wentian seemed to see Li Muran's doubts, and explained: "The yin qi here is very strange, which can cut off vitality, so there are no other creatures in the cave except for yin beasts, and even weeds with very tenacious vitality cannot grow." Therefore, the two Daoists should also be careful, although it doesn't matter much to a high-level cultivator like me if I inhale a small amount of Yin Qi, but if I stay here for too long, I'm afraid it will also be bad for my body!"

Li Muran nodded, his physical body was strong and extremely vigorous, so he was not too afraid of this yin qi, but the physical body of the Thousand Illusion Fairy was average, so she sacrificed a layer of faint black flame to protect her body and prevent the yin wind from invading her body.

Bu Wentian also took out a fist-sized pearl-shaped treasure and stimulated a milky white halo to protect himself from the Yin Wind.

The three of them continued to explore the depths of the cave, and the depths of the cave became wider and wider, and it was simply a cave.

Suddenly, a fierce yin wind swept towards the three of them, and where the yin wind passed, Li Muran only felt the pain on the surface of his body like a knife, but no blood flowed out; the black flame of the Thousand Illusion Fairy's body protection was almost extinguished at once; as for the white halo on Bu Wentian's body, it also became dim all of a sudden.

"It's a high-level Yin Beast, no doubt!" Bu Wentian exclaimed, and he hurriedly blessed his mana to stabilize the protective halo on his body.

"In this environment, the high-level Yin Beasts are shadowless and formless, like a wisp of Yin wind, the monk's naked eye can't see them, and the divine mind can't lock on to them, so it's very difficult to catch!" Bu Wentian continued, "So, I'm going to try to lure them out of the nest, and then use a special method to make them manifest, so that we can have a chance to kill them." ”

As he spoke, Bu Wentian took out a palm-sized gray jade compass from his arms, and there was a small white point of light on the compass, which was flickering constantly.

Suddenly, the point of light shifted its position, and at the same time, a sharp wind blade transformed by an invisible yin wind swept towards the three of them.

This time, the three of them had already prepared, and each of them sacrificed their supernatural power to protect their bodies, but it didn't have much impact.

"This Xuan Yin Disk can sense the position of the Yin Beast at close range. Bu Wentian said, "Nearby, there is a high-level Yin Beast. I'll lure it out soon!"

The three of them slowly retreated towards the entrance, and the Yin Beast followed them, rolling up bursts of invisible Yin Wind from time to time.

However, when the three of them were about to reach the entrance of the cave, the point of light turned by the Yin beast actually disappeared on the Xuanyin disk, and they did not continue to chase after it.

"This Yin Beast is not fooled!" Li Muran frowned and said, "It seems that we have to use the second plan, which is to block the Yin Beast in a closed corner, and then try to kill it." ”

"This ......" Bu Wentian hesitated a little, he said worriedly: "It is true that there are monks who have used this method to hunt and kill Yin Beasts, and they have also succeeded, but there should be more than one Yin Beast in this lair, if I go deep into it, it may summon its companions to join us, and then we will have to fight with Yin Beasts in the depths of the cave, I am afraid it will be very dangerous." ”

Li Muran smiled slightly and said, "It's indeed a bit dangerous. In this way, Bu Daoyou might as well stay at the entrance of this cave and set up a formation to prevent those Yin beasts from escaping from the entrance of the cave. And how about my husband and I go into the cave and drive those yin beasts out?"

"Of course I don't have an opinion in Xia!" Bu Wentian said: "Originally, I just said it later, and when dealing with the Yin Beast, I was just assisting from the side. Since the two Daoists have the courage to go deep into the lair, please take care. ”

Li Muran and the Thousand Illusion Fairy agreed, and then flew towards the depths of the cave.

They also each took out a Xuanyin disk, which was a special magic weapon purchased in the Fang Market, and could only sense the breath of the Yin Beast at a very close range.

After coming to the place where they had encountered the Yin Beast, the two of them felt a gust of Yin Wind coming, and the Yin Beast was indeed still here.

"That guy isn't here, it's more convenient for me to make a move!" Li Muran said.

"That's right, against the ethereal and ethereal special existence of the Yin Beast, ordinary spells, supernatural powers, and sword treasures have no obvious effect, and they must be used with very restrained means to effectively kill them!" said the Thousand Illusion Fairy.

"Yin beasts are the most yin and dark things, the so-called yin and yang are mutually restrained, so use the magic power of the yang to the light to deal with them!"

After that, the Thousand Illusion Fairy suddenly opened his mouth and squirted, and a slender wisp of seven-colored spiritual fire sprayed somewhere.

In an instant, the spiritual fire turned into a raging sea of fire, filling all the caves not far away.

In the sea of fire, a terrible and sharp cry came out, and a unicorn of the size of a zhang could be faintly seen struggling in the sea of fire.

"This is the Yin Beast!" Li Muran said: "The seven-colored spiritual fire of the phantom glass is originally a very high-quality spiritual flame, and it is the divine power of the Yang and the Light, and it is the most restrained to deal with this kind of yin and evil thing!"

Sure enough, in a moment, the body of the yin beast was swallowed by the seven-colored spiritual fire, and in the sea of fire, a fist-sized gray bead was revealed.

"This is the Yin God Bead!" The Thousand Illusion Fairy immediately put away the seven-colored spiritual fire and withdrew the gray translucent bead into her sleeve.

A difficult fourth-order yin beast is equivalent to the cultivation of the early stage of the demon body, in this special environment, because of the strange supernatural powers, it is often difficult for most demon god late-stage cultivators to deal with. However, in front of Li Muran and the Thousand Illusion Fairy, this kind of feminine flaw is too obvious, and it is still vulnerable.

"According to Nabu Daoyou, there should be at least one fourth-order Yin Beast here. I'll look for it later. Li Muran said.

The two of them continued to explore deeper into the cave.

In the depths of the cave, the yin qi became thicker, and the light disappeared completely.

Even the illuminating treasures such as the moonstone and the night pearl sacrificed by the two of them disappeared immediately after a few breaths.

"Whew!" In the darkness, an invisible strong wind struck the two of them, and Li Muran hurriedly blocked in front of the Thousand Illusion Fairy, relying on his strong body, and forcibly took this strong wind.

The sharp wind blade caught in the strong wind cut his skin, and it hurt to cut, but there was no wound left.

The Thousand Illusion Fairy looked at the Xuanyin Disk in his hand, and there were no points of light on it at all.

"Oops, the Yin Qi here is too heavy, and the Xuanyin Disk can't capture the specific location of the Yin Beast. The Thousand Illusion Fairy frowned slightly.

"It doesn't matter," Li Muran smiled slightly: "Although the naked eye, divine thoughts, and treasures can't capture them, their whereabouts can't escape my third divine gaze!"

After that, Li Muran's eyes closed slightly, and an inch-long crack suddenly opened on his forehead, and the crack opened, revealing a pitch-black third eye.

In this dark and lightless environment, this third divine eye, known as the dark pupil, can see the surrounding scenery clearly!