At night, Rubai did not go back to the house to meditate, but went to Yizhi Pavilion to check the record of Thunder Leaf.

Before this, he had never heard of this strange spirit grass bathed in thunder, and today he heard Yao Lao mention it, in addition to worrying about whether Jun Mianchen could successfully pick the thunder leaves, Rubai himself was actually very interested in this kind of heaven and earth exotic grass.

"Thunder Leaf...... Born at the beginning of the Tribulation, withered at the end of the Tribulation...... Leaves have no roots, no return to mountains and rivers...... Only the heavens and the earth ......"

Rubai silently read the sporadic records about Thunder Leaf in the sect, and the strange light in his eyes became thicker and thicker.

For the record of Thunder Leaf, the Medicine Immortal Sect of Nuoda only has this few words, and this book of different records is very old, if it weren't for Rubai to come to read it, this record of different records would have been covered with thick dust.

And the sporadic records, I don't know which generation of the ancestors of the Medicine Immortal Sect recorded, there is no description of the medicinal properties, pharmacology and general description of the Thunder Leaf in the record, so how did the Medicine Elder know that the alien grass at the top of the Nine Heavens of the Nirvana Realm is the Thunder Leaf?

Mountains and rivers of no return...... Only heaven and earth!

Such as white eyes and dew, these eight words, what a big breath!

If this thunder leaf really only exists when the heaven and earth are thunder punished, then why does the thunder leaf in the Nirvana Realm survive for a long time?

Rubai sat up straight, slowly closed the alien record in his hand, and thought about the secret between this thunder leaf and the Nirvana Realm in his mind.

I'm afraid that if Yao Lao hadn't mentioned it today, he would never have had such a strong curiosity about the Nirvana Realm.

Nirvana, he has naturally been to the white realm.

It can be said that within the Nirvana realm, there is an independent small world, but that small world is strange and abnormal, not only growing a lot of rare and exotic grasses, but even some herbs and trees that the medicine elder can't name also exists.

And the top of the Nine Heavens mentioned by Yao Lao is a wonder in the Nirvana Realm, which is a mountain range composed of nine incomparably tall peaks, located in the center of the Nirvana Realm.

At the top of a large mountain range with nine peaks, it is called the Top of the Nine Heavens.

With Rubai's cultivation, he did not rashly climb to the top of the mountain, so Rubai was not impressed by the top of the Nine Heavens, but when Rubai's primordial spirit traveled in the Nirvana Realm, he would occasionally hear thunder rolling from the top of the Nine Heavens to spread all over the eight directions.

Yao Lao said that there was a thunder leaf there, and at this time, it was difficult to distinguish the true from the false, so he could only half-believe it, and wait for Jun Mianchen to explore it.

However, the Thunder Leaf, which even a powerhouse like Yao Lao could not pick, could he really pick it with Jun Mianchen, who had the source of thunder, alone......

This night, Rubai didn't meditate, his mind kept imagining the appearance of the thunder leaf bathing the sky and thunder at the top of the nine heavens, and he believed that if Jun Mianchen heard this difficult task, he would definitely agree.

Because if he had the source of thunder, he would definitely climb to the top of the nine heavens of the Nirvana Realm, and have a glimpse of this 'no return to mountains and rivers, only heaven and earth'!

......

In the Lingmu Hall, Jun Mianchen was the same as Rubai, and he also did not meditate and practice.

It's just that Rubai is fascinated by the Thunder Leaf, while Jun Mianchen is busy in the Bottle Realm.

In the Bottle Realm, a hundred spirit grasses were planted by Jun Mianchen, and after these few months of growth, those undisturbed spirit grasses all grew luxuriantly, making Jun Mianchen happy.

But at the same time, Jun Mianchen is also worried about the defects in the bottle realm!

Previously, Jun Mianchen had already discovered that the appearance of the world in the Bottle Realm required a large amount of spiritual energy to maintain, and as these spiritual grasses grew more and more luxuriant, more and more world spiritual energy was absorbed every day.

As a result, although there is no little guy in the Bottle Realm to exhale aura, the degree of aura consumption in this realm itself is increasing day by day.

Those strange landscapes in the Bottle Realm could no longer be seen far, far away at this time, some of the water flows dried up, and some of the mountains were smoothed out, all because the concentration of spiritual energy was decreasing every day.

Jun Mianchen stood in the middle of the bottle, looking at this world of his own, and a deep sense of powerlessness came to his heart.

In fact, for a long time, Jun Mianchen has also been paying out of his own pocket, and the more than 40 million high-grade spirit stones exchanged for the auction of Su Yu's body have been put into the bottle realm little by little to maintain the stability of the world.

But this is not a way after all, there will always be a day when the money will run out, and the more than 40 million high-grade spirit stones have been invested in almost 10 million at this moment.

Every day, a large number of high-grade spirit stones were thrown into the Bottle Realm, making Jun Mianchen's heart drip blood!

"A cure must be found...... Even if there is no cure, we must find a substitute for the spirit stone......"

Jun Mianchen had a sad face, sitting in front of the spiritual grass field in the Bottle Realm, muttering to himself.

In fact, Jun Mianchen had already discovered that the effect of this bottle of the Middle Realm on the absorption of spiritual energy did not seem to have a high conversion rate of spiritual energy produced by spiritual stones.

In other words, if you use a magic weapon to transform the aura, you will transform more aura than a spirit stone of the same value.

Therefore, it is an extremely luxurious method to maintain the stability of the Bottle Realm all the time, after all, its conversion rate is too low......

But Jun Mianchen doesn't have too many treasures on his body now, except for spirit stones, let alone magic weapons, in this otherworldly continent where magic weapons are scarce, if you want to find magic weapons, except for the large-scale auction of Xianmu Pavilion, no one will sell them at all!

That's it...... Jun Myanchen was worried...... I sat down until the next morning.

On this day, Rubai came to Jun Mianchen's cave house early.

And Jun Mianchen had just come out of the Bottle Realm, and when he heard that Rubai was taking him to comprehend the Soul Separation Technique, this news almost didn't make Jun Mianchen jump up excitedly!

What do you really want...... After returning to the Medicine Immortal Sect yesterday, he had just planned the important matters in the near future, and he had listed the study of the Soul Leaving Technique and entering the Nirvana Realm as the top priority.

No, it's only the second day, and I haven't taken the initiative to mention it, Rubai has already talked about it, which really makes Jun Mianchen very happy.

Unexpectedly, Jun Mianchen originally thought that this soul separation recipe would be directly entered into his soul for study, just like Ling Yuchuan gave him the Clear Heart Insight Method at that time.

However, this is not how it happened...... After Rubai came to find Jun Mianchen, he didn't say a word, and took Jun Mianchen through the back mountain until he came to a place similar to a high tower.

According to Rubai, the comprehension of the Soul Separation Recipe requires entering this tower to comprehend, and the degree of comprehension of each person is different, so there is no specific method and classics for this Soul Separation Technique, and at the same time, the effect of each person's study is also different.

This tower is behind the back mountain, Jun Mianchen has never been to it before, and at this time, staring at this pagoda, Jun Mianchen suddenly has a feeling when he faced the first floor in Taiyi Gate in the Western Regions.

It's just that this tower is not as grand as the first floor, and from a distance, it seems to be more like a small spiritual monument.

Jun Mianchen's eyes were strange, and under the guidance of Rubai, he walked into this tower.

As Jun Mianchen's figure disappeared, Rubai stood silently in place, and after a long silence, Rubai gently closed his eyes and meditated cross-legged in the same place.

On the other hand, Jun Mianchen, the moment he stepped into the tower with curiosity, his whole person seemed to be lost, lost in a vast Dao Palace.

The reason why this is a Dao Palace is because the space in front of you seems to be a huge palace, and all the walls of the palace are formed by various incomprehensible golden Dao scriptures.

The size of this palace made Jun Mianchen feel in a trance that he was just like an ant, and the whole person stood in the corner of one of the Dao Palace walls and looked up, but he couldn't see the top of this Dao wall.

It's too big...... This is Jun Mianchen's intuitive feeling.

If you want to learn the Soul Separation Technique from this place? Rubai didn't explain the specific method, could it be that he let himself comprehend these Taoist scriptures?

Jun Mianchen's face was embarrassed, and while looking at the Taoist wall around him, he slowly walked forward.

I don't know how long I walked, Jun Mianchen looked at it, and he hadn't even completely walked through a piece of Taoist wall around him!

And in the far away place where the head could not be seen, Jun Mianchen could vaguely make out that there was a piece of golden light flashing, but he didn't know what was at the end of the ......

"That's too big, isn't it...... I'm not even an ant here...... I haven't walked through this single piece of Dao Sutra wall for so long, how many years will it take to walk through the entire Dao Palace?"

Jun Mianchen's face was embarrassed, the Taoist scripture wall around him was composed of many golden scriptures, and he couldn't understand it.

And the space here is simply ridiculously large, according to Jun Mianchen's thinking, if a giant thousands of times larger than himself is here, I am afraid that he will not be able to cross a piece of Taoist wall in a single step.

Is this really the place to learn about the Soul Escape?

Jun Mianchen didn't believe Rubai, but this situation made Jun Mianchen have some retreat for the first time.

In this space, it seems that time and space have become infinitely huge, and I am as insignificant as a speck of dust, not to mention the secret of soul separation, and I don't even know when I will be able to go out.

Jun Mianchen walked in the Dao Palace step by step, and the golden Dao Jing wall around him felt like it would never be able to go over, spreading infinitely...... Stretching ......

......

"How's it going, did the kid go in?"

I don't know what time it was, Rubai gently opened his eyes, and beside him, the figure of Yao Lao was already standing there quietly.

Rubai stood up and bowed to Yao Lao.

"It's been a day and a night. ”

Yao Lao nodded, staring at the tower in front of him, his eyes seemed to have a look of remembrance.

After a moment of silence, Yao Lao turned around and looked at Rubai.

"After you left, the old man went back and thought about it, don't let Jun Mianchen go to the top of the Nine Heavens to pick the thunder leaf. ”

As if his eyes were strange, he did not speak.

I saw Yao Lao pacing slowly for a few steps, his hands behind his back, looking at the tower in front of him and speaking in a deep voice.

"What a good seedling, if there are any irresistible factors in the Nirvana realm, it is the fault of the old man, although the thunder leaf is good, but the top of the nine heavens is probably not as simple as imagined, the old man was curious for a while, went to the top of the nine heavens to take a look, and found that in addition to the thunder leaf, he also found a strange place, so that the old man has been unforgettable for so many years. ”

Yao Lao's deep voice suddenly shrank his pupils.

What does Yao Lao mean? There is another weirdness at the top of the nine skies? What is it?

Rubai took two steps forward, side by side with Yao Lao, his eyes full of curiosity.

"Yao Lao, what did you find at the top of the Nine Heavens?"

After being silent for a long time, Yao Lao slowly turned around, staring at Rubai with a pair of eyes.

"At the top of the Nine Heavens, there is a skeleton. ”