This small grass, which is no more than a foot tall, looks weak and windless, but it is really strange that the Heavenly Tribulation just now is so strong that it has not been destroyed. Although it grows under the thunder spirit wood and is sheltered by the thunder spirit wood, with its shape, it should be wiped out as long as a slight lightning arc is splashed.

The other plants and trees around Lei Lingmu have disappeared without a trace, and even the place name is scorched black, but this little grass is still vibrant, and even a new leaf has grown, which is really incredible.

"Could it be that this is also a thunder-attribute spirit grass, so it survived the heavenly thunder?" Li Muran naturally came up with such a thought, but after careful investigation, he couldn't sense that this spirit grass had any thunder-attribute aura. Besides, if this grass is a thunder attribute spirit grass, Xiao Lei will definitely find it and will not ignore it.

"It's not a thunder attribute spirit grass, what kind of spirit grass is it?" Although Li Muran was not proficient in the art of herbal alchemy, he had read a lot of classics, and most of the spirit grass elixirs could still be recognized, but he had never seen or recognized the small grass in front of him.

"If it is really as I guessed, it was because this grass has grown a new leaf because of the calamity just now, then the quality of this grass must be extremely high. Li Muran said secretly in his heart.

It is rumored that in the process of breeding or growing some treasures against the sky, it will indeed contain too strong and incredible power, guiding the feedback of the laws of heaven and earth—that is, the generation of heavenly tribulations. And it is necessary to survive the heavenly tribulation smoothly before the treasure can continue to grow, otherwise it will be wiped out, turned into the most basic energy, and returned to heaven and earth.

Ordinary spiritual herb elixir, even if it is a 10,000-year-old elixir, will not cause a heavenly tribulation, and only some rumored treasures with anti-heaven effects can attract a heavenly tribulation.

And this little grass just grew a new leaf, and it actually attracted the terrifying Spirit and Demon Double Tribulation, which shocked Li Muran.

Li Muran counted carefully, and including the newborn leaves, there were a total of seventy-nine leaves in this little grass. If every leaf that grows has to go through a heavenly tribulation, hasn't this little grass already experienced at least seventy-nine heavenly tribulations?

Li Muran was even more shocked. Because when the heavens and earths mentioned in the classics breed, they only experienced one or two heavenly tribulations at most, and this little grass actually had to go through so many heavenly tribulations, which showed that it was extraordinary.

There is only one reason - it should not be a thing in this realm at all! However, it appeared here by chance, so every time it grows, every time it gives birth to new leaves, it will attract the feedback of the laws of heaven and earth, and attract the catastrophe.

"This must be a strange treasure!" Li Muran was overjoyed, he wanted to dig up the grass away, but he still held back.

"This grass is still emerging with new leaves, obviously not fully ripe, it is a pity to pick it now!" Li Muran said secretly in his heart. In the world of cultivating immortals, there are many treasures that have the best effect when they are ripe, even if they are only a little bit not fully mature, the effect is often greatly reduced, and even contains strange poisons.

Li Muran took a closer look and found that at the top of the grass, there were two thin shoots, one large and one small. Presumably, this shoot can also grow into new leaves, which means that in time, this little grass should be able to grow eighty-one leaves.

Eighty-one is the number of the nine palaces, and it has an unusual meaning in the world of cultivating immortals. As far as cultivation is concerned, eighty-one week is a big week. Li Muran has reason to believe that when the eighty-one leaves are all grown, this little grass should also be mature.

It's just that how long it will take for two more leaves to grow, Li Muran can't estimate. Maybe it's a few years, maybe it's a few hundred years, maybe it's thousands of years, it's not necessarily. After all, the living habits of different spirit herbs and elixirs are too far apart to be predicted.

However, Li Muran could recognize the age of this thunder spirit tree next to the grass, and the thunder spirit wood was seven or eight thousand years old. If the age of the Lei Ling Wood and the grass is about the same, then the grass should also be seven or eight thousand years old, and on average, a new leaf will be born in about a hundred years. It will take two hundred years to grow two new leaves, which is not a long time, but it is not short.

"I don't know how long I'll be trapped in this sealed space, and I'm not in a hurry to dig up this grass. It's never too late to take it out before leaving. Li Muran thought so.

Although Li Muran didn't know the origin of this grass, he could first roughly tell whether it was a spirit grass or a magic grass. The method of judging is also very simple, that is, to see whether this grass is absorbing spiritual energy or demonic energy.

It's easier said than done. Because the process of absorbing the vitality of heaven and earth is very slow and steady, almost integrated with the surrounding environment, it is difficult to detect.

However, Li Muran's sensitivity to the vitality of heaven and earth was much higher than that of monks of the same rank. He sat beside the grass, closed his eyes and concentrated, luck "Nameless Formula" exercises, between breathing and breathing, carefully sensing the changes in the vitality of the surrounding heaven and earth.

This little grass has just germinated new leaves, and it has just experienced the Heavenly Tribulation, and it needs to replenish a large amount of Heaven and Earth Yuan Qi, so the speed at which it absorbs Heaven and Earth Yuan Qi is much faster than usual, which is also more conducive to Li Muran's induction and identification.

"Huh!" Li Muran suddenly opened his eyes in shock, he sensed it several times, and found that this grass was completely inselective about the surrounding heaven and earth vitality - in other words, whether it was demonic energy or spiritual energy, the grass was absorbing it.

"Could it be that this grass is also a dual cultivation of spirit and demon?" Li Muran muttered in surprise. Judging from the spirit and demon double heavenly thunder that appeared before, this statement is not unreasonable.

However, it is also a dual cultivation of spirit and demon, and the thunder spirit wood beside Xiaocao is half green and half gray, obviously unable to fuse the two qi of spirit and demon, but separate from each other. This is also the same as Li Muran's original dual cultivation of spirit and demon, he can only use demonic energy to stimulate demonic skills and use spiritual energy to perform spiritual methods, which cannot be confused.

However, this little grass was completely natural, and on the surface, it was impossible to see the boundary between spirit and demon. Li Muran couldn't help but wonder, could this grass be able to fuse the two qi of spirit and demon?

If this is the case, it is definitely a treasure against the sky! No wonder it has to go through one catastrophe after another in the process of growth!

Li Muran's heart was pounding, the two qi of spirit and demon have always been mutually exclusive, even the masters of the Mahayana period of the spirit realm cannot fuse these two heaven and earth vitality. If this grass has the magical effect of fusing the two qi of spirit and demon, it will definitely be of great use.

Li Muran took out a stack of talismans and laid layers of hidden talismans around the grass, making it difficult for the nearby demon beasts to discover the grass.

He had already made up his mind to practice here for a period of time, on the one hand, to help Xiao Lei hit the bottleneck of the Yuan Shen Stage, and on the other hand, to quietly wait for the grass to mature.

Previously, Li Muran had absorbed a large amount of sword qi and divine thought power sealed by Master Xuanguang, and his cultivation had reached the level of the peak of the middle stage of the Yuan Shen. At the same time, his divine thoughts grew a little. There is also the 10,000-year-old ice spirit obtained from the Evil Spirit Valley Eating Dream Realm Ye Shuang, which is also a great supplement for cultivating divine thoughts, but Li Muran has never been willing to completely refine this treasure, because his divine thoughts have been cultivated to the extreme, even if he refines the 10,000-year ice spirit, the effect will not be too significant.

Now that he has obtained the last three layers of the Taixu Sutra, there is a lot of room for the improvement of his divine thoughts. After careful consideration, Li Muran decided not to hit the bottleneck of the exercises for the time being, but to practice the fourth layer of the exercises of the Taixu Sutra.

The stronger the divine mind, the easier it will be to break through the bottleneck. Moreover, the conditions for him to cultivate the "Taixu Sutra" have already been completed, but he can't cultivate because he has never had exercises.

Li Muran carefully sorted out the exercises of the "Taixu Sutra" in his thoughts, and recited the fourth mantra three times from beginning to end, and pondered it carefully.

He spent half a month of exercises, and after he basically comprehended the theme of the fourth-layer exercises of the "Taixu Sutra", he began to cultivate.

The divine thought turned into wisps of clear spring and swam in Li Muran's body. However, Li Muran had just been running for a small week according to the fourth-layer exercises, and suddenly his face changed and he looked up.

I saw that above the dense forest, a cloud of spirit clouds gathered again, and the spirit clouds kept rolling, which was the sign of cloud calamity!

"Oops, I encountered another catastrophe!" Li Muran smiled bitterly. This is not the catastrophe of the mysterious grass, but the catastrophe caused by himself.

He once encountered a heavenly tribulation when he was cultivating the Hinayana of the first layer of the Taixu Sutra and the second layer of the exercises. Because the Taixu Sutra is a little too powerful for the Nether Monks, it causes a heavenly tribulation.

Unexpectedly, when he arrived in the spirit world, he had just begun to cultivate the fourth-layer exercises, and there was actually a heavenly tribulation, so from this point of view, in the spirit world, the "Taixu Sutra" also belongs to an extremely powerful anti-heaven exercise!

The little thunder, which was originally turned into a thunder egg and was motionless, sensed that the master was about to have a heavenly calamity, and unexpectedly broke out of the "shell", and it spread its wings and flew away, directly submerging into the calamity clouds.

"Boom!" A golden thunderbolt slashed down and landed on top of Li Muran's head.

Li Muran had already prepared, and the golden jade clothes on his body instantly inspired countless gorgeous spiritual runes, piled up layer by layer on top of him, protecting his whole body.

At the same time, Li Muran even turned his divine thoughts into a shield, and in an instant, he formed a shield transformed by a phantom, blocking the golden thunder.

"Smack!" Jin Lei directly pierced through layer after layer of spiritual light runes, shattering these runes. Immediately, Jin Lei smashed the phantom shield again, and then landed on Li Muran.

Li Muran's whole body was shocked, and after a period of soreness and pain, he relied on his powerful body to dissolve the residual power of this golden thunder.

Although this thunder is powerful, fortunately, there is only one. The clouds dispersed, and thunder flew out of the clouds.

Li Muran's means are extraordinary, and he has Xiao Lei to help, so it is not a problem to resist this golden thunder!

Xiao Lei also absorbed a lot of the power of heavenly thunder because of this, and its breath became more violent.

"Xiao Lei is finally going to officially start his advancement!" Li Muran's heart moved.