When Styx was a child, he also heard that Styx Night said that such a spar grew in the Valley of Ten Thousand Demons, but the Demon Soul Sect also had a clear rule that the children of the sect were not allowed to destroy this spar until it was absolutely necessary. Not to mention bringing it back, the Stygian Moon has never even seen its true face.

"I think it's unlikely that I want to bring the rainbow demon spar back, the rainbow demon spar is used to absorb the demon qi of the Ten Thousand Demon Valley to grow, if you forcibly bring it back, I'm afraid that the spar will lose its original strength. What's more, the cold pool of the Ten Thousand Demon Valley is extremely deep, and we don't know the specific size and weight of the spar, so we really have to take it out of the bottom of the pool, so let's go and see it and then think about it in the long run!"

"But the idiot only gave you three days, I'm afraid it's too late!"

"I have my own way to explain where I am stupid, if I guess correctly, he will definitely come to me tonight, let me appease him first, and the two of us will go to the Valley of Ten Thousand Demons early tomorrow morning to see the rainbow demon crystal. ”

Sure enough, just as the Stygian Moon thought, the Idiot appeared directly in his room late at night, and at that time, the Stygian Moon was just about to sleep, and saw the Idiot suddenly appear, fortunately he was already prepared in his heart, otherwise he would really be frightened.

"Can you not show up next time...... You don't look at your appearance, an old man with a white body suddenly appears in front of you, it's easy to scare people to death!"

"Would the famous demon god still be afraid of an old man?

Shenyue told the idiot what she thought, and the idiot smiled softly and said, "Then I'll give you three days, I'll come to you after you deal with the guard, as for the reduction of the exercises, you don't have to worry too much, I think the woman next to you can help you quickly practice the exercises." ”

The meaning of the idiot is very clear, what he said is Mo Yuqing. Mo Yuqing's own Heartthirst Technique is strong, and she has a guardian beast, so it is not very difficult to help the Stygian Moon cultivate.

Early in the morning of the second day, the Stygian Moon left the Demon Soul Sect for Mo Yuqing, and they came to the Valley of Ten Thousand Demons in half a day. Styx Moon hadn't been here for a long time, and some of the demon beasts in captivity here were only enough to satisfy the other ordinary disciples of the Demon Soul Sect to take them as guards, and the worst in his body was also a rare demon beast.

Because no one has come here to hunt demon beasts for a long time, there is now a thick layer of demonic qi floating in the sky over the entire valley, and the plants and some small demon beasts in the valley are growing very fast.

Stygian Moon and Mo Yuqing walked in the forest, and the demonic energy emitted from the two of them caused some small demon beasts on the periphery of the Ten Thousand Demon Valley to flee one after another, and they also walked towards the depths of the forest without fear.

There were some large 10,000-year-old demon beasts around them, but as soon as they were about to get close to the Stygian Moon, they fled in a panic as if they saw the Grim Reaper, and all this was not because of how powerful the Stygian Moon Technique was, but because there was a red demonic qi floating behind Mo Yuqing, which was deliberately emitted by her, and it was also unique to the Guardian Divine Beast.

They walked through the dense jungle and came to the center of the Valley of Ten Thousand Demons, which was under a mountain, and the cold pool they were looking for was inside this mountain.

The cold pool was formed older than the Valley of Ten Thousand Demons, and the mountain has only one entrance to enter the interior of the mountain, while the entrance to the cave is at the top of the mountain.

Styx Moon and Mo Yuqing did not stop, they came to the top of the mountain non-stop, and found this entrance to the cold pool in the huge stone forest on the east side of the mountaintop.

They walked cautiously inside, it was not very dark, but the space was very narrow, and the road was always downhill and very steep.

Styx Moon walked in front of Mo Yuqing, and the road in the cave became wider and wider, and now two people could stand side by side.

"Do you feel it?" Mo Yuqing asked Styx in a low voice.

"Hmm...... This demonic qi is slowly getting stronger, I estimate that this is only now on the mountainside, if you go to the cold pool at the bottom of the mountain, the demonic qi is likely to be heavier than the two of us. ”

"Be careful, it's not a good thing that the demonic qi is too heavy! our own demonic qi collides with the spar, if the hedron demonic qi is not strong, it is very likely to be devoured!"

Mo Yuqing was worried that the demonic qi of the two of them would be absorbed by the spar, and if they couldn't suppress the spar, it would be quite dangerous, not only their own demonic qi, but also the protection in their bodies.

Because they walked slowly, and they didn't know how many hours had passed, they finally saw the red glow coming from the end of the passage.

Walking out of the passage, a very pure waterhole appeared in front of them, and the stone wall directly above the waterhole hung countless pale pink crystals, and there was no other way here, only a circle of messy boulders around the waterhole.

There were bursts of demonic energy exuding from the waterhole, and when he came into contact with this demonic energy, he felt that his bones were cold, and the dark moon couldn't help but shiver.

Through the glass-like water of the pool, you can clearly see a blood-red crystal sleeping at the bottom of the pool, which is not large, just like a person's arm inserted in the sand and stone at the bottom of the pool.

The heads of those pink crystals fishing in the sky above the cold pool exuded black demonic energy, and these demonic qi were directly absorbed by the rainbow demon crystals under the cold pool.

Shenyue was just about to walk into the cold pool to take a closer look at this spar, but Mo Yuqing hurriedly called out to him: "Wait......"

"What's wrong?"

"Look at these slightly lighter colored spars on the top of their heads, I think the other side of them must be exposed on the cliff outside the mountain, in order to absorb the demonic qi emitted by various demon beasts in the Ten Thousand Demon Valley, if we forcibly take this spar away, it will not be able to absorb the demonic qi, and it will soon lose its original effect and become a 'dead' spare!"

"Dead hedrons?"

"Well, it's an ordinary spar, and it doesn't have a container that can be used to seal the soultooth shark at all! I think it has to absorb demonic energy to feed itself at all times, and it seems that we can't take it away!"

"How's that good?"

Mo Yuqing observed the surrounding environment and said firmly: "Fortunately, this place is secluded enough, and people who don't have a passion for the practice can't enter or stay here for a long time." Looks like we need to seal the Soultooth Shark in this place!"

"What? The seal is here?"

"Hmm...... Sealed under this cold pool, you can just use this spar to absorb the demonic qi, which can last for 10,000 years!But now there is a very critical problem, after you withdraw the soul tooth shark, the heartthirsty technique will be lowered to the sixth layer realm, so your demonic qi is bound to weaken a lot, I am afraid that your body will not be able to resist the demonic qi emitted by the rainbow demon spar at that time, and will be devoured. ”

"What you said is not a good method, but you don't need to worry about the lack of demonic energy after my exercises are reduced, and it will be eaten back! Although the loss of the Soul Tooth Shark will reduce the exercises and lose a large amount of demonic energy, there are still several other rare guards in my body, and these guards are enough to support my exercises and emit more demonic energy, so it is not much of a problem to deal with this crystal!"