Qingxu Dao Chang found Lu Changan and said a little embarrassed, "Master, we have set up a spirit gathering array around this forbidden demon cave, and there is only one formation eye left at this time, can you please borrow that spirit bead and use it as an array eye?"

When the previous contract was successful, when the Seven Star Array was successful, Qingxu Daoist and Su Qianmo returned the spirit bead and the cloud swallowing bead to Lu Changan, so the spirit bead was still in Lu Changan's hands at this time.

And this Spirit Gathering Array laid out by Tianyan Sect actually has a formation eye, but with such a large Spirit Gathering Array, their ordinary array eye is obviously not as good as the spirit bead in Lu Changan's hand, so the Qingxu Dao Leader will think about whether he can borrow Lu Changan's spirit bead for the time being.

I wanted to mention this matter to Lu Changan when I was in the main peak before, but everything was too busy before the battle, and I was busy until now before I got out of my body and mentioned it to Lu Changan, until I was about to open the big array, I remembered to come to Lu Changan to borrow the spirit bead.

Lu Changan naturally had no problem when he heard that the Qingxu Daoist wanted to use the spirit bead, and he directly took out the spirit bead, but he was a little puzzled by the spirit gathering array in the Qingxu Daoist's mouth, so he stretched out his hand and handed the milky white spirit bead to the Qingxu Daoist and asked suspiciously, "What spirit gathering array?"

The Spirit Gathering Array is actually the most basic formation that cultivators have learned, and Lu Changan has naturally heard of it, but this formation is generally used to increase the concentration of spiritual energy around him when cultivating or breaking through, and the range of use is very small, so what Lu Changan is puzzled about is what can this Spirit Gathering Array be used for at this time?

"Oh, yes. "Qingxu Dao Leader has been busy recently, and he has forgotten that Lu Changan didn't know about the formation at all, so he took the beads and hurriedly explained to Lu Changan, "Previously, our Elders Council had been thinking about how to get rid of the suppressive effect of the Forbidden Demon Cave and the Nine Turns Heavenly Demon Tower's geographical location on us. ”

"But after thinking about it for a long time, I couldn't think of any good way, and finally I had a whim to make this simplest formation more or bigger, so we have been trying it for the past few days. And because there are too many formations, the spiritual power gathered is a little messy, and it requires a lot of array eyes, which is even more inconvenient to control, and it requires many disciples to be left behind to control the formation, so we finally studied changing this spirit gathering array and setting up a larger formation. ”

Qingxu Daoist said, feeling that it might be too late in time, so he made a gesture of invitation to Lu Changan as he spoke, signaling that he could take a look at this large spirit gathering array by the way. Lu Changan naturally understood the meaning of the Qingxu Dao Chief, so he followed the Qingxu Dao Chief to the place where the array eyes were placed.

"Large Spirit Gathering Array, then the materials consumed by this should be larger, right?" Lu Changan had also heard of larger or smaller formations before, but compared to normal formations, the amount of formation base required would inevitably change, and the control of this amount was particularly difficult and important.

As the name suggests, the Spirit Gathering Array is to gather the spiritual energy to the location of the formation, because a normal Spirit Gathering Array is enough to gather the spiritual energy of a hundred meters around the body, so if the design of the large Spirit Gathering Array is not properly related, then there is no difference between it and the normal Spirit Gathering Array except for the amount of materials used in the formation base, and there is no difference in other places.

The layout of the formation is not because the bigger you are, the more aura you absorb, and the smaller you are, the less you absorb. Although the Spirit Gathering Array is the simplest formation, but to make it bigger, it is necessary to enhance the power, and the difficulty of it can still be imagined, otherwise anyone can make a large-scale Spirit Gathering Formation, then those sects will directly build their own sects on the Spirit Gathering Array, and they can absorb the rich spiritual energy every day when they practice?

Lu Changan could guess how many difficulties and failures he had experienced just by listening to what the Void Dao Chief said. The most important thing is not these failures and difficulties, but the pressure. Because you are about to face the demons, this formation may be the only effective way to compete fairly against the demons.

And how difficult it must be to study something in such a short period of time that so many predecessors have not done.

Qingxu Dao Chang nodded, not denying it. This large-scale Spirit Gathering Array had indeed consumed a lot of material resources that had been passed down from the Tianyan Sect for so many years. And they can only do this with the strength of the whole sect now.

"But it's only theoretically possible, and the real effect will have to wait for the formation to be known. Qingxu Dao Leader said with some nervousness, "Because I wasn't sure if this Spirit Gathering Array could be used before, I haven't told the disciples in the sect yet." ”

Lu Changan nodded in understanding, after all, if he said it in advance to the end but failed to successfully complete the Spirit Gathering Array, it would have a great impact on morale. Besides, if you put a battle eye in this place and try it before, you will let the demons know what you do.

If the demon clan knew that the Tianyan Sect had set up such a formation at their doorstep, no matter what the purpose, they would do everything possible to destroy it first. It's like the Demon Clan's God-Inviting Formation set up in Tianyan Sect, if Lu Chang'an and they had known about the Demon Clan's actions, let alone the God-Inviting Array, even if it was an ordinary non-lethal maze, they would have to destroy it first.

And even if the experiments in other places have been successful before, whether the demonic qi is strong here or not can succeed is another way, and it is better not to tell the disciples of the Tianyan Sect for the time being.

Lu Changan followed the Qingxu Daoist to the top of the Forbidden Demon Cave, and the reason why the Forbidden Demon Cave was called a cave was because he was in the mountains of the entire back mountain of Tianyan Sect.

There is a grotto on the wall of the back mountain, and when you enter it, you will see the Forbidden Demon Cave, and when you come out, you will be the Tianyan Sect. But this cave is not an ordinary cave, the eight immortals opened up a void in the mountain when they sealed it together, which means that the hinterland of this mountain has its own world, and the entrance of the cave is just a door to enter this world.

Therefore, Lu Changan and the others came to the top of the Forbidden Demon Cave, but in fact, it was only on the top of the back mountain, and the eye of the Spirit Gathering Array was also built here. When he came to the place where the eye of the formation was, Lu Changan could feel the difference between this place and other places.

Inspired by the Demon Clan's Divine Invitation Array, the setting of the Spirit Gathering Array of Tianyan Sect was also modeled after the method of the Spirit Gathering Array, but this Spirit Gathering Array was not as simple as a simple array within a formation. It's a formation within a formation, and there are three layers of formations to synthesize this one formation.

Because the formation is set on the outside of the Forbidden Demon Cave, it is uncertain whether it can penetrate into the Forbidden Demon Cave, so the second layer of the formation is set into a formation with penetration and tracking, and the most central formation is a small operating formation.

In fact, there is another reason why the Qingxu Dao Chief asked Lu Changan to borrow the spirit bead, that is, if the entire formation cannot operate normally, this innermost formation will drive the absorption of the power of the spirit bead to be sent into the formation, so it can be said to be a double insurance.