My talisman pen is omnipotent. How should you deal with it?

Five days later, Chu Ci finally arrived near the mysterious cave.

More than three years have passed since I last left this place, but the formation arranged outside the cave still stands quietly in its original place, silently guarding the cave like a loyal guard.

Chu Ci carefully inserted his spiritual sense into the place, and after a careful investigation, he confirmed that no one else had been here since he left last time.

For the sake of caution, Chu Ci did not enter the cave immediately. He took out the remaining 12 divine eyes from his arms and inserted them into the ground one by one at the four directions of the cave, namely the southeast, northwest and northeast, and at a distance of a thousand miles from each direction.

In this way, any disturbance within a thousand miles, even the slightest change, would be difficult to escape Chu Ci's perception range.

After coming back again, Chu Ci took Peng Qi into the mysterious cave.

The interior of the cave had changed a lot from before. When he left, it was just a pile of ruins left by the self-explosion of the bright-horned deer. The only things left in the entire cave were the circular formation emitting blue light and the remaining roots of the vine.

But now, a few sparse green plants have quietly poked their heads out from various corners of the cave. Not only that, even the originally bare and withered vines seem to have sprouted some tender green buds.

Lan Yixin was only knocked unconscious by the aftermath of the last fierce battle with Chen Yun, and did not suffer any serious internal injuries. After taking a few pills from Chu Ci, she has recovered.

Chu Ci set up a Jue Xiang Formation in a corner of the cave, and at the same time gave Lan Yixin a water-attributed foundation-building pill.

Since the last time, Lan Yixin has deeply realized that her own cultivation is still shallow and she might even become a burden to Chu Ci. Now seeing this foundation-building pill, she is extremely happy and excited, and vows not to come out until she succeeds in building the foundation.

After Lan Yixin entered the Juexiang Formation, Chu Ci took out a martial arts technique, a thousand magic crystals and ten bottles of corpse evil air and handed them to Peng Qi.

"Fellow Daoist Peng, I dare not speak rashly about the methods of practicing the Way of Corpse. You still need to comprehend and explore the mysteries on your own. Here are some items that I hope can help you. If you have any other needs, please feel free to speak up. I will take care of everything."

Peng Qi was quite decisive. After accepting these things, he quietly walked to a corner of the cave, sat down, and began to practice with all his heart.

Next, Chu Ci focused his attention on the strange blue circle array in the center of the cave. It was impossible to break this array with his current knowledge and ability. However, Fang Cheng had previously given him a set of array diagrams specifically used to break various arrays.

It seems that whether or not one can solve the blue circle formation in front of him depends on this formation diagram.

Chu Ci carefully unfolded the formation diagram given by Fang Cheng, looked at the densely packed lines and symbols on it, and immersed himself in the study of the formation diagram, completely forgetting himself.

After three days of research, Chu Ci finally had a deeper understanding of this formation diagram. He found that the principle of this formation was the mutual restraint and mutual generation of the five elements. Theoretically, it could break any formation in the world.

However, in order to activate this formation, one must use medium-grade or higher spirit stones. The quality and quantity of the spirit stones depend on the power of the formation.

Chu Ci happened to have some mid-grade spirit stones in his hand, which were the spoils he had previously divided up from Old Ancestor Wu Long.

Now everything is ready, only the east wind is missing. As long as we can successfully refine the formation flag, we can start trying to break the formation.

Time flies, and two months passed quickly. During this period, Chu Ci worked hard, following the instructions of the formation diagram, and refined all the formation flags one by one. Then, he inserted the twenty-four formation flags into the designated positions one by one, tightly surrounding the blue circle formation.

According to the explanation of the formation diagram, the more powerful the formation to be broken is, the more spirit stones will be consumed.

Chu Ci followed the method in the diagram and began to put spirit stones into a special container. One, two, three... As more and more spirit stones were put in, the number gradually accumulated to more than a thousand. At this time, the originally calm formation began to tremble slightly.

Three full days passed quietly, and there were only a few mid-grade spirit stones left in Chu Ci's hands. With a crisp sound, the unbreakable blue circle formation instantly collapsed and shattered.

With this crisp sound, the small spring hidden in the formation finally revealed its true appearance. The spring was only the size of a finger, and no one knew how many years it had been flowing here silently.

When the formation was broken, an unimaginably rich spiritual energy gushed out. Just taking a few breaths made people feel extremely refreshed.

Due to the infiltration of spring water over the years, the land around the spring is wet.

Chu Ci took out a small bowl and placed it next to the spring. Because the spring water flowed slowly, it took half an incense stick of time to fill half the bowl.

Chu Ci placed the small bowl in front of his eyes and looked at it carefully. He saw that the liquid in the bowl was light blue and exuded bursts of spiritual energy.

Chu Ci had also read some records about spiritual springs, and most of them were drinkable. However, Chu Ci did not dare to drink it directly. Instead, he summoned the ghost stone monkey and placed half a bowl of spiritual spring in front of it.

The stone monkey sniffed with its little nose, picked up the bowl and drank. As soon as its mouth touched the liquid, its eyes suddenly widened and then it drank it all in one gulp.

After drinking half a bowl of the spiritual spring water, it seemed still unsatisfied. It looked at the small spring again, pounced on the ground, put its mouth to the spring and began to suck big gulps, until Chu Ci pulled it away.

After drinking the spring water, the Ghost Stone Monkey became very excited. It first burped with satisfaction, and then jumped up and down in the cave. In order to make it easier to observe, Chu Ci did not put it into the spirit beast bag, but let it move freely.

The next step is to test whether the spring water has any special effects in growing spiritual herbs.

According to Chu Ci's speculation, the reason why there were so many spiritual herbs in this mysterious cave before must have a lot to do with this spiritual spring. The spiritual spring was sealed in the formation and could affect the surrounding plants. Now that the seal has been lifted, the effect will definitely be greatly improved.

He first took out a few spiritual fruit cores and planted them on the ground, then poured spiritual spring water on them. No matter how magical the thing was, it would not be possible for it to take effect so quickly. While waiting, Chu Ci began to refine the Zi Hai He Chong Formation.

Three days later, the Ghost Stone Monkey changed. It was no longer as excited as before, but a little listless, even drowsy, and it could hardly open its eyes.

Chu Ci simply let it sleep in the corner of the cave, which also made it easier to observe the stone monkey.

About half a month later, Chu Ci had finished refining the two sets of formations. The spiritual fruit cores that had been planted some time ago also responded, and several seedlings more than three inches long grew out.

Chu Ci had planted 12 spiritual fruit cores before. Logically, the germination rate of these fruit cores should be about half after planting, but this time it was different. All 12 saplings grew, and they seemed to be much thicker than those planted before.