Su Chen spent three years to break through the small bottleneck in the middle stage of Jindan, and did not use elixirs such as "Mysterious Spirit Fruit" to impact the bottleneck, but relied on his own years of accumulation to break through this small threshold.

He found that after using the Mysterious Spirit Fruit many times, it would have an "anti-drug reaction" like taking the same elixir for a long time, and the more he ate, the more the effect of the elixir would decline. It is necessary to change the type of elixir frequently to avoid antimicrobial reactions.

Now that he is in the middle stage of the Golden Pill, the effect of taking this spirit fruit again is already the same as an ordinary third-order Great Yuan Qi Pill, which is not as good as before. Therefore, he also tried to avoid taking the Mystic Spirit Fruit again.

...

Su Chen was in the Multiple Mountain Immortal City where the Lingdao Alliance was located, and the "Su Clan's Danqi Pavilion" had been in seclusion for nearly three years.

Seeing that the triennial discussion meeting was about to be held in a few months, the fairy city became more and more lively. Many Jindan monks rushed to the Duoshan Immortal City in advance, made friends from all walks of life, and prepared to participate in this new session of the Daoist Conference.

Su Chen is looking forward to this, and he should be able to meet Anu in the future, as well as Wu Qiao and Old Master Lu, these old friends.

However, there are still months to spare.

Su Chen thought that he had reached the realm of the first level of refining master, and if he had achieved a little success in alchemy, he should also refine a few top-grade offensive and defensive magic weapons for his human body.

Attacking magic weapons do not have good materials for the time being, so they cannot be refined.

But defensive magic weapon, he thought of a good thing, and he had enough raw materials to use.

"Mithril Materials!"

"The most powerful spell-repelling material in the Divine Immortal Cultivation Realm, after any armor is added with Mithril, it can be significantly enhanced to resist all kinds of spells. ”

"If it can be refined into a set of Mithril armor, it will greatly weaken the killing effect of the enemy's spells, and it will be difficult to hurt by water and fire, and ten thousand laws will not invade!"

Thinking of this, Su Chen couldn't help but feel excited.

He rummaged through his storage bag and found five hundred pounds of Mithril ore.

As early as when he was in the foundation realm, he had these Mithril Ore, but this thing was too rare and rare in the Immortal Cultivation Realm, even a few catties of Mithril Ore would attract salivation, and he had kept it unused, and he didn't dare to take it out and entrust others to refine it.

Now that he has mastered the alchemy technique, he can completely refine it by himself, without the need for a dummy. In addition, he is already a Jindan monk, and he needs such a top-level spell defense armor, so it is time to take it out and refine it.

There are two processes in the refining of Mithril, one is "purification" and the other is "smelting".

The first step of the refining process is to "purify" the raw ore.

There is a lot of slag in the raw ore, which cannot be used directly. Any ore must first go through the first process of "purification". The stone and all kinds of scum in the mine are removed, and pure ore is refined. Otherwise, the attributes are messy, the quality is low, and it can't be used at all.

The higher the purity, the higher the grade.

The first-order lower-grade dark iron and the first-order high-grade dark iron are both extracts of thousand-year-old dark iron, but the purity is different, and the price is a few grades different.

The most common refining techniques, "high-temperature fire and water invasion", are unable to refine and purify these Mithril ores. When Mithril Ore encounters various auras such as water and fire, it will force them to avoid it automatically.

However, this problem has long been solved by Su Chen with a special method.

He used a large group of Mithril Spirit Devouring Flying Ants to build the foundation realm, and ate the five hundred catties of Mithril Raw Ore, and then they pulled out the separated and purified Mithril camels. Rubbing away a thick layer of scum on the outside, a small particle of Mithril that had shrunk more than ten times was revealed.

This was repeated dozens of times, constantly improving the purity of Mithril, and finally became dozens of catties of high-purity Mithril. The quality is as high as the fourth order, and it belongs to the Yuanying level refining material.

Each of these small particles of Mithril with strong magical properties exudes a mysterious and brilliant Mithril light. It is extremely pure and has a very soft texture, which can be shaped at will.

Su Chen didn't know what kind of refining technique his purification method of using the Spirit Devouring Flying Ant belonged to.

He searched through almost all the refining classics he could find, and there was no record of the purification of minerals by the Soul Devouring Flying Ants. Obviously, it's either an undiscovered technique or a secret one.

Next, the second step in refining the Mithril artifact is to "melt" it into a tool.

Mithril has the property of repelling, but the texture is too soft and not strong enough to resist the slash of the sword. Mithril and other hard "gold and iron materials" must be melted together in order to act as a magic weapon.

Of course, there is an easier way, which is to apply a layer of Mithril coating to the surface of the artifact, which is much less difficult and can also enhance the artifact's refuting properties.

It is important to make sure that the Mithril coating is not damaged, as it will fail.

Immortal cultivators often damage magic weapons. So this method is tricky, but it's not reliable.

The best way to do this is to melt pure Mithril and gold and iron into one and refine it into an armor artifact. Even if it is damaged, it will not reduce its healing effect.

However, ordinary refining techniques such as blazing flames obviously did not have any effect.

Su Chen tried to use a special ice burning technique to create dozens of ten-zhang Xiaoice crystals, gathering many solar true fires to smelt.

The power of the true fire condensed by each ten-zhang ice crystal was focused on one point, and the firepower was comparable to the full force of a late-stage Jindan monk.

And as many as dozens or hundreds of giant ice crystals, such a fierce Sun True Fire, focused on a square inch in size, its power was even comparable to the Samadhi True Fire of a Yuan Infant Cultivator, and even a intact fourth-order defensive armor magic weapon would be burned through in an instant.

Su Chen was surprised to find that the high-temperature beams condensed by the sun's true fire shone on the pure Mithril, and a slight protective film was actually formed on their surfaces, which still could not melt it.

Mithril can even dispel high-temperature beams, which is shocking and incredible.

...

Su Chen thought hard for a long time, and tried to use many refining methods recorded in the refining classics, but he still didn't think of any way to smelt these pure Mithril.

He had to go to Tianbao Zhai and ask the refining master Wei Lao for advice.

Wei Lao is a refining master who has been famous in the multi-mountain immortal city for hundreds of years, and he has a lot of experience. Although he is extremely low-key, he has opened a Tianbao Zhai Refining Pavilion but rarely accepts orders, but his alchemy skills are recognized as second to none, and he is a top-level refining master in the entire East China Sea Immortal Cultivation Realm, and is highly respected by many Jindan monks.

"Mithril?"

When Wei Lao heard this, he couldn't help but be taken aback.

He knew that Su Chen had recently lived in seclusion in Immortal City, specializing in the art of refining weapons.

Su Chen was a big customer of Tianbao Zhai, and he had entrusted him to refine many top-grade magic weapons, including a fourth-order top-grade blood coral war halberd.

Wei Lao was strict-mouthed, so naturally he would not mention this matter to outsiders.

But it doesn't mean that he doesn't hear what is going on outside the window, he has also heard that there is a Great Demon King of Baibu in the East China Sea Demon Realm. It is said that a fourth-order blood coral halberd in his hand once fought in and out of the Demon Emperor Palace, and cut off the heads of several Jin Danjiao cultivators, and his strength was extremely powerful.

The Blood Coral Battle Halberd with a grade of up to the fourth order, I'm afraid it's just one thing in the world.

Wei Lao also didn't know why this superb blood halberd ordered by Su Chen fell into the hands of the Great Demon King of Baibu.

He also felt quite mysterious about the "identity" of Su Chen, the Jindan monk of the Penglai Immortal Sect, but he never asked.

In the past few years, Su Chen has studied alchemy in seclusion, and he occasionally points out Su Chen, a "junior refiner".

He didn't expect that Su Chen would be interested in Mithril materials.

"Mithril material, this is the pinnacle of refining. 'Mithril, Mithril, Mithril, and Misty Iron' can be called the four most difficult refining materials, with completely different attributes, but they are all extreme.

Mithril is an ingredient that can occasionally be obtained in the deep trenches of the East China Sea, but in extremely rare quantities. With only a small amount of Mithril added to a magic weapon, it can greatly increase the magic attribute by two or three percent. Do you have Mithril?"

Wei Lao Dao.

Su Chen couldn't help but explain and smiled, "I found a little Mithril in the bitter cold plateau in the north, in the mine. So he thought about it and used it to refine it into a magic weapon. ”

Wei Lao was surprised when he heard this. "The raw Mithril ore found on the northern plateau of Middle-earth? ”