Yin Ning, who was suddenly surprised, began to enter a state of madness, dancing for a while, crying with joy for a while, panicking for a while, sobbing for a while, and laughing at the sky for a while......

Yin Ning, who was embarrassed by herself, tossed for more than half an hour before she gradually regained her composure and began to regain her keen thinking ability.

"First of all, I must not let anyone know that this skull has such a ability to defy the sky, and I must not tell anyone, not even my parents, this secret can only be known by me, and this thing can only be kept by me. ”

Yin Ning, who knew that the husband was innocent and guilty, after calming down, the first thing he thought of was not how to use the skull's anti-heaven ability to seek his own well-being, but how to protect the secret of hiding the skull, and even his loved one Yin Ning did not intend to share it with him.

Although it seems extremely ruthless to want to do this way, it is extremely wise, to spend the belly of a gentleman with the heart of a villain, it is one of the necessary skills to survive in the cultivation realm of the weak and the strong, and Yin Ning can learn without a teacher, but it is very unexpected.

"Look at the clouds released by the skeleton just now, let the vision of the lower grade spirit stone change into a medium grade spirit stone, although it is not big, but it is definitely not small, if you let the lower grade spirit stone advance to the middle grade spirit stone in the future, it should still be in the practice secret room with a guardian prohibition and a more secret. ”

After thinking about some secrecy measures again, Yin Ning finally couldn't hold back his still surging heart, and held up the medium-grade spirit stone in front of his eyes, looking at this blue and watery small spar, feeling the amazing water attribute aura coming out of it, Yin Ning suddenly grinned, overjoyed but at the same time said in disbelief.

"It can actually make the lower grade spirit stone advance to the middle grade spirit stone, the middle grade spirit stone is a scarce thing in the immortal cultivation world!"

In the world of cultivating immortals, among all kinds of resources, mineral resources such as unsuspected spirit stones are the most scarce, after all, most of the elixirs and other things can be regenerated. An elixir with thousand-year-old medicinal power, in the medicine garden opened up in the land of the top spiritual veins, after careful care and cultivation, may only take a few decades to be cultivated.

However, spiritual stones and other mineral treasures are almost non-renewable, even if they can be conceived theoretically, but the time it takes is calculated in 100,000 million years, and although cultivating immortals can prolong their lives, the highest realm cultivators in this realm can live for about two or three thousand years at most, and the time in their lives may be far less than a medium-grade spirit stone to conceive and grow.

All the heavenly and earthly treasures in the immortal cultivation world are all after the beginning of chaos, after millions of years, tens of millions of years, or even hundreds of millions of years of breeding and precipitation, it is used up one point less, one less than the same, and even those high-level heavenly materials and earth treasures that are slowly conceived and have a small amount have begun to become extinct, making many methods of refining treasures handed down from ancient times useless, and many sects that inherit the way of refining weapons have gradually begun to decline and decay, and even disappear directly.

Although the spirit stone does not belong to the Heavenly Materials and Earth Treasures, as long as the exchange ratio between its various grades can clearly reflect how bad the lack of high-grade Heavenly Materials and Earth Treasures in the cultivation realm is now.

In the legendary flood era, about seven or eight lower-grade spirit stones can be exchanged for a medium-grade spirit stone, in the ancient times hundreds of millions of years ago, about twenty lower-grade spirit stones can be exchanged for a medium-grade spirit stone, in the Middle Ages fifty or sixty million years ago, seventy or eighty lower-grade spirit stones can be exchanged for a medium-grade spirit stone, and in the ancient times tens of millions of years ago, more than a hundred lower-grade spirit stones can be exchanged for a medium-grade spirit stone.

From the exchange ratio of the middle and lower grade spirit stones, it can be concluded that those mineral deposits in the immortal cultivation world are really used less and less, and low-grade mineral deposits like the lower grade spirit stones, because of the rapid gestation, the value increase is not high, but the middle and high-grade mineral deposits like the middle grade spirit stones that take tens of thousands of years to breed are because of their scarcity, so the value has been soaring.

In the era where Yin Ning lived, the exchange ratio of lower-grade spirit stones and middle-grade spirit stones had reached an astonishing six or seven hundred to one, and it was conceivable that other minerals and real heavenly treasures that were rarer than middle-grade spirit stones must have been scarce to the extent that it was difficult to find priceless gold in the market.

"I have the ability to improve the quality of the spirit stone, but how can I use the medium-grade spirit stone in exchange for magic weapons and pills that can greatly improve my strength? ”

Yin Ning soon fell into the trouble of happiness, and was worried about how to use spirit stones, which is also a big miracle in the world of cultivating immortals, there will be monks who are worried because they have too many spirit stones and the quality is too high, if they are known by Yin Ning's outer doors who are lacking spirit stones, they will definitely beat Yin Ning who is in the blessing and does not know the blessing to death.

But Yin Ning's happy troubles are indeed real, and once they are not handled well, they are likely to cause Yin Ning to be killed.

Even if a great cult of cultivation like the Corpse Nightmare Sect has a sphere of influence covering a quarter of the entire Zhaoyou Country, and it also occupies five small countries adjacent to the Zhaoyou Country, controlling more than 10 million miles of land, but the Corpse Nightmare Sect has less than fifty large and small medium-grade spirit stone mines, and the number of medium-grade spirit stones produced every year is only fifty or sixty thousand.

After these medium-grade spirit stones were distributed to the peripheral garrison members and the Xiuzhen family attached to the Corpse Nightmare Sect, only about half of them might actually be transported back to the main altar of the Corpse Nightmare Sect, and then they were divided by those ancestors and elders, and what could really flow into the hands of the disciples was actually a very small amount, and most of them were used as rewards and rewards, given to those talented inner disciples and core disciples, and it was generally difficult for the outer disciples to see the middle-grade spirit stones.

Although Yin Ning didn't know much about the preciousness of the medium-grade spirit stones, he was keen-minded, and from the amazing exchange ratio between the middle-grade spirit stones and the low-grade spirit stones, he had already understood that the middle-grade spirit stones were rare things, and he had to be careful with them, and came up with a foolproof way to make himself use the medium-grade spirit stones without attracting the attention of others.

"By the way, I'll change my face, and then go to the Fang Market outside the sect and use up the medium-grade spirit stones, won't I be unaware?"

After Yin Ning held the medium-grade spirit stone and thought hard for a long time, he finally came up with a method that seemed to him to be the most feasible and safest.

On the way back to Kuzhu Peak from Jiyunfang City, Yin Ning had already discovered from his conversation with Lu Xingcai and Chu Rong that all the markets in the land of Zongmen Mountain Gate were actually the property of the various Xiuzhen families attached to the Corpse Nightmare Sect, and they were inextricably linked with the Corpse Nightmare Sect.

Yin Ning estimated that as long as he used the medium-grade spirit stone in these markets, he would definitely be noticed by these forces, and conduct a detailed investigation of him, an outer disciple who did not have any strong background, but could take out the medium-grade spirit stone, and then the secret of the skull would be exposed, and Yin Ning himself would definitely not end well, either killed or imprisoned.

And those markets outside the sect are different, although they may also be controlled by a certain Xiuzhen family or a certain force in the dark, as the head snake, they are also well-informed, but it is impossible to reach the point of penetrating into the corpse nightmare sect, to use medium-grade spirit stones in these fang markets, and after purchasing the things they need, they will immediately return to the sect, and then, wait for those who have the intention to track down to find out to no avail, after the limelight, Yin Ning can repeat the old tricks, choose a new fang market, make another big purchase, and then hide in the corpse nightmare sect, so that the people who track down and inquire have nothing to do。

But Yin Ning also knows that there are hidden dangers in this method, for example, if he is too greedy, too carried away, and uses too many medium-grade spirit stones, those forces who notice him will definitely not hesitate to buy people from the Corpse Nightmare Sect to probe him, so how many medium-grade spirit stones are used at one time, how many items are purchased, and how not to attract attention as much as possible, this degree Yin Ning must be grasped well, and the best place to choose is to be as remote and small as possible, because that means that the forces behind it must not be a great force, anyway, the things that Yin Ning wants to buy now are all things used by monks in the Qi refining period, not rare and rare treasures, most of these small markets can provide。

After thinking about it for a while, Yin Ning took out a jade slip from the storage bag, which was borrowed from Lu Xingcai by Yin Ning in order to increase his knowledge before parting, and there was a huge map in it, marking the location of some markets and hunting spots within nearly a thousand miles outside the Tibetan Cuo Mountain Range.

Although Lu Xingcai is a poor monk, the map jade slip he has is not a high-end product, the map is only marked with green dots with place names written on large and small, and the introduction information displayed is not very detailed when he points to these green dots with his divine sense, but it is very good for Yin Ning now, it is an urgently needed thing, after looking back and forth on the map four or five times, Yin Ning finally chose an inconspicuous Fang City called Muyuefang City as his target place.

"This Muyuefang City is less than four hundred miles away from the Tibetan Cuo Mountain Range, although the flight speed of my imperial weapon is slow, but it will definitely be able to arrive within two days, but the key is not the problem of speed, but the question of whether it can be safely arrived and returned, after all, after three hundred miles out of the mountain gate, there is no more patrol by the guardian team, and the probability of encountering some murderous and over-the-top evil cultivators will be greatly increased, I heard Senior Brother Lu say, and even some evil cultivators are specially guarding those roads that must be passed, waiting for the outer disciples of the Rabbit Corpse Sect. ”

Thinking of this, Yin Ning's heart was instantly filled with indignation, and he began to curse his sect loudly in the center of his mouth.

The Corpse Sect implements the cultivation model of survival of the fittest and encouragement of struggle among the outer disciples, but not only within the sect, but also outside the sect, the Corpse Sect encourages the outer disciples to fight with the outside monks, and also encourages the outside monks to find trouble with their own outer disciples, the most direct way is that the Corpse Nightmare Sect will never retaliate against those monks who kill their own outer disciples, as long as those monks are not stupid enough to spread the news of how they killed the outer disciples of the Corpse Nightmare Sect everywhere, take out those seized tokens and other things to show off everywhere, and maliciously provoke the Corpse Sect, then the Corpse Nightmare Sect will not issue an order to kill, and send the masters of the sect to hunt down and kill these monks who killed their own disciples。

Over time, some bold cultivators also regarded the outer disciples of the Corpse Nightmare Sect as fat sheep, and many of them even began to lurk outside the Corpse Sect, specifically attacking and killing those outer disciples they thought they could defeat, and some even relocated their own cave mansions, and devoted themselves to hunting and killing the outer disciples of the Corpse Sect as if they were their own careers.

As long as these evil cultivators are cautious and do not provoke those outer disciples who have backstage and relatives and friends who will avenge their hatred, then as long as the evil cultivators deal with it cleanly after killing people and seizing treasures, and do not ostentatiously pass through the market, then they will never be punished and hunted down by the Corpse Sect.

But after all, the Corpse Nightmare Sect is a great sect of the Demon Dao, even among the outer disciples, it is also Crouching Tiger, Hidden Dragon, capable people, and there are many outstanding people among the outer disciples who have tempered their courage, improved their strength, and become inner disciples, or even core disciples.

But Yin Ning thinks that he is not such a fierce man now, and if he wants to save his life in Muyuefang City this time, he must be carefully prepared.

After figuring it all out and having a preliminary plan in his belly, Yin Ning silently put all the items into the storage bag, then picked up the black crystal skeleton that had been restored to its original state, re-entered the practice secret room, and closed the stone door tightly.