The profession of a deep-sea miner is actually quite interesting and full of mushroom-picking fun, because it is difficult to predict what kind of mineral deposits you will encounter in the next moment.

Now, it is the thirtieth year of Duan Heng's roaming under the sea, he is complete, incarnated as a qualified deep-sea miner, along the ruins of Zhucheng all the way north, he does not remember how far he has come, but the harvest is absolutely abundant.

In the bottom of the endless sea, there are a lot of mineral deposits, especially black-scale iron ore, as long as the surface of the sea mud is dug out, then there is a ninety percent chance of finding black-scale iron ore.

And the quality is not bad.

Even that thick layer of sea mud is also quite valuable, if it is dug back, it can be used as fertilizer for the spiritual herb garden, the effect is quite good, and many trading houses in the immortal cultivation world are specialized in excavating and selling sea mud.

He had no interest in these sea mud duanheng at all, all he needed was black scale ore, and under normal circumstances, he had already quenched and purified it to Yulin Iron when he mined it.

This process consumes the energy of the immortals.

It's simple, there's nothing complicated.

Therefore, in the past thirty years, Duan Heng had accumulated at least five billion catties of Yulin Iron for himself, and such a huge amount could not be put in the Qiankun bag, so the only thing he could do was to pile it up into a mountain, a mountain peak under the sea.

During this period, Duan Heng also encountered those vicious thieves or robbers more than once, but without exception, he had his head cut off.

It wasn't until today that he could breathe a sigh of relief, as he could finally process the huge amount of Jade Lin Iron further.

This thing of Yulin Iron represents a stage, that is to say, it is the ultimate that ordinary immortal cultivators can achieve by refining with the qi of immortals.

If you want to continue refining, it will be much, much more complicated.

This is also why Duan Heng must accumulate five billion catties of Yulin iron. before you can continue to quench and purify.

In the next step, it can be purified and quenched into Yulin Refined Iron, which is already a spiritual material, which can be used to create magic weapons, ordinary spiritual weapons.

However, what Duan Heng needed to construct the second form of Dragon Yuan was dragon scale essence iron. That is to say, continue to quench the Yulin Refined Iron to get the Dragon Scale Iron, and then continue to quench the Dragon Scale Iron, and finally get the Dragon Scale Iron, if the Dragon Scale Refined Iron continues to be refined, you will get the legendary Dragon Scale Iron, but the legend is just a legend. Since Momen was banished, the Immortal Cultivation Realm, which had lost the most esoteric refining method, was on the bright side, and it was difficult for anyone to refine the dragon scale Xuantie.

This is a material that can cause some damage to scattered immortals and even earth immortals.

Duan Heng even speculated maliciously that perhaps this was one of the reasons why Momen was banished, and it was the means of the Nine Heavenly Emperors to control the force of the Immortal Cultivation Realm, just like the gun ban law on Earth.

Because if the immortals go to the fairy world. Naturally, there were better materials for refining weapons and spiritual weapons and even immortal weapons, so of course they couldn't look down on this kind of dragon scale Xuantie, which was not too cost-effective. But at the same time, he is extremely disgusted with this kind of material that can hurt himself and can be refined little by little by immortal cultivators, especially to limit those wild immortals with bad intentions.

Obviously, this kind of dragon scale black iron will become the favorite of those wild immortals, and with the skillful refining, they can even use the dragon scale black iron to refine a half-immortal weapon that is slightly inferior to the immortal weapon.

This is the biggest unstable factor in a harmonious society.

However, slander is slander, but Duan Heng does not dare to take it lightly.

The process of purifying Yulin iron to Yulin fine iron. In fact, it is the most basic refining method in the immortal cultivation world, in the era when the dethronement of the hundred schools did not happen, any immortal cultivator could master it, but now, it must be necessary for a county-level immortal cultivator to be eligible to get it from the gradually unlocked cultivation exercises. Of course, there are other ways to do this, but they are all illegal.

At this time, he roamed all over the world, first making sure that there were no wandering water demon thieves coveting him, and then he began to arrange.

Although he had never had experience in refining weapons, refining Yulin Refined Iron was really not very high-end, so after thinking about it for a while, he was already confident.

The first step is to open up a large enough space to separate the sea water with ice, after all, the conditions are limited, and it is impossible for him to find a land or island, five billion catties of jade lin iron, the amount is too much, and it can only be refined on the spot.

In the second step, instead of the spirit jade, the cold jade condensed by the cold and evil qi casually determined the eight directions of life, death, shock, injury, rest, Jing, Du, and Kai, of course, Duan Heng actually had no research on this Dao, but he knew that the root of this thing was to maintain balance.

Whether it is alchemy or refining, the door of life enters, the door of death comes out, the door of the scene is in the middle, and the rest is regulated by large and small fires, everything is to ensure stability and balance, just ask, if in the process of alchemy or refining, the temperature fluctuates up and down, who can stand Nima?

Of course, this is limited to alchemy and refining weapons, if it is a formation or a higher prohibition - Duan Heng feels that he is brainless to study that.

For example, at this moment, Duan Heng actually focused on the two directions, the door of life and the door of death, and everything else was dispensable.

And the third step, which is said to be the most important, needs to depict the corresponding prohibition on the spiritual jade, so as to form a void Ding furnace, the legend of the tall heaven is the treasure cover, the earth is the Ding furnace, that is the meaning, and only in the process of alchemy will a special Ding furnace be used, completely to block the emission of medicinal herbs.

This step took a lot of time, because those ghost drawing runes were too complicated, God knows how those guys came up with it in the first place, this is not as complicated as the Qinglong rune and the Xuanwu rune.

The Qinglong rune and the Xuanwu rune, if you look at it literally, are very simple, and the most difficult thing is whether the power and will contained in them can be matched and accepted, which is completely metaphysical.

But what Duan Heng wants to learn at this moment is simply an endlessly strengthened version of the C language, do you say that you are just a ban that represents the flame, using hundreds of lines and patterns to intersperse back and forth, densely entangled, and then madly stirring three times?

On top of that, such a complex thing had to be multiplied by a factor of ten, and then it could not be mistakenly carved on a piece of spirit jade the size of a fingernail. At the same time, it is also necessary to ensure that the fairy spirit or evil qi flowing from each line cannot be more or less!

This cliff is deliberate.

After trying for a long time, Duan Heng still decided to give up, not because he couldn't afford to play this kind of difficult acrobatics, but because he found that even if he succeeded in doing it, such a piece of spirit jade could be used dozens of times at most. Then it had to be re-portrayed.

Normally, Duan Heng might have this kind of leisure, but now he is facing a full five billion catties of Yulin Iron.

Therefore, Duan Heng began to be lazy, because any refining method did not exist in the first place, and if others could come up with a way, then he could also come up with a method that suited him.

Of course, Duan Heng would never tell those experienced refining masters who had an extremely high refining level. He took out an extreme sky-splitting cold qi and used it to cheat.

That's right, refining tools don't necessarily need flames, and when any kind of power reaches the extreme, it has the effect of easily changing the properties of objects.

Although, there will certainly be a little after-effect of this.

But who cares, Duan Heng is not refining that extremely exquisite spirit weapon magic weapon now, he is refining a full five billion catties of Yulin Iron.

Then naturally the stupid and black way is the most suitable.

Now that it's decided. It's simple, and you don't need any preparation. Duan Heng directly took out a piece of Heavenly Frost Jade that he had traded during the Heaven and Earth Great Sacrifice before, and then used the Howling Moon Sword to break through its prohibition and throw it directly on the mountain peak formed by five billion catties of jade lin.

Almost at the same time, a terrifying cold air burst out in an instant, and all the jade lin iron brushes were shrouded in white ice, and the surrounding sea water was also frozen at the same time.

As for Duan Heng himself. It was even more frozen in it, however, this was different from the last time when it was close to the Heaven Splitting Chill, and this time there was only one Heaven Splitting Chill.

So although it was terrifying, Duan Heng could bear it.

After ten breaths. He had already quickly broken free, and he didn't care what kind of freak that five billion catties of Yulin Iron had become, he himself desperately absorbed the remnants of the Heaven-Splitting Cold Qi.

After more than ten days, Duan Heng exhaled softly, this sky-splitting cold qi, he only absorbed about one in three hundred, but this was already very good.

Originally, he thought that it would be good if he could absorb 1 in 500, and this time he seemed to have earned it.

When Duan Heng's gaze looked back at the mountain formed by the jade lin, as expected, the peak, which was originally at least a few hundred zhang high, had now shrunk to the size of a seven-story building.

"Hehe, hot expansion and cold contraction! This principle is simply universal in all directions. Duan Heng teased in a good mood.

However, of course, things will not be so simple, but the result is worthy of affirmation, after these five billion catties of jade lin iron are refined by the alternative 'refining' of splitting the sky and cold qi, there will definitely be a change.

Slowly stepping forward, Duan Heng carefully looked at it for a long time, and finally nodded, as expected, this kind of jade lin iron has completely turned into another unknown material after being destroyed by the cold air of splitting the sky, not dragon scale essence iron, let alone dragon scale black iron, but it seems to be some kind of crystal, all solidified together, the color is green jade, and there seems to be wisps of white cold mist circulating in it, which is very beautiful.

Taking out the Xiaoyue Sword, Duan Heng first slashed it to confirm the hardness and flexibility, but the result surprised him, because the Xiaoyue Sword was actually slashed on the spring and was bounced back, and then, the sword was stained with a layer of frost.

"I'll go, what's this good thing?"

After Duan Heng was stunned for a moment, he immediately became ecstatic, who would have thought that the cold air of splitting the sky and the jade lin iron could actually produce such an unexpected effect, the jade lin iron has completely lost the attributes of hardness and sharpness, and instead of it, it is unimaginably flexible, such an effect has no advantage in dealing with sharp attacks like the ancient sword, but the direct attack of any weapon, or that kind of boulder bombardment, slashing or something, is an excellent defense.

His Long Yuan, doesn't he need such a treasure?

Well, wait, if he remembers correctly, among the sacrifices requested by those immortals in the immortal realm during the Heaven and Earth Great Sacrifice, Yulin Iron and Dragon Scale Iron are the big heads, right?

Tsk, this is definitely a pleasant surprise!

Even this secret seems to be strictly controlled by those immortals, at least Luo Qingli and Luo Yunrong don't know, otherwise they won't fail to tell themselves, because he has the matter of splitting the sky and cold qi, both of them know.

So now it seems that there are a lot of things that can be dug deep here!

For example, the ratio of Splitting Sky Cold Qi to Yulin Iron?

Even others similar to the Purple Flame Heavenly Fire, the Mysterious Immortal Qi, these, maybe they can also test out some weirdness.

It seems that he will need to collect the list of sacrifices that the immortals have always needed in the future.

However, the top priority is that he still wants to see if this unknown material can be used in his second form of Long Yuan? Once it can be perfectly absorbed by Long Yuan, haha, then his future life will be immediately guaranteed. (To be continued.) )