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Xin Yan had 7,000 demon troops under him, which also meant that he had to refine a full 7,000 sets of battle equipment. The www.biquge.info of the Pavilion has to refine so many battle equipment, even if it is a powerful refining hall, it will take at least a month or two to complete.

If it was to be refined one by one, no matter how high the level of Xin Yan's refining weapons was, it would never be possible to complete the refining of these seven thousand sets of combat equipment in a short period of time.

Xin Yan decided to adopt the method of group refining to make war equipment for the cultivation of the seven thousand demons under his command.

The method of group refining is an extremely difficult and difficult method of refining, and the requirements for refiners are extremely high, in addition to having an extremely high level of refining, they must also have an extremely strong physique, a strong divine sense and profound spiritual power.

Xin Yan's cultivation is a fragment of gold refining, and he has always been a fellow practitioner of the three forces, whether it is spiritual power, divine consciousness, or physical power, it is far stronger than ordinary cultivators. Especially after he fused the infant body, his cultivation was even more rapid in his cultivation, and now his strength is comparable to that of a master at the level of Duxu.

The most important thing is that he has a pure and powerful natal true fire like the Divine Soul Flame, which can make him more handy when refining weapons, and greatly improve the efficiency of refining weapons.

In fact, Xin Yan had also tried to refine weapons with the method of group refining before, such as the twenty-four Cold Star Shining Moon Swords in the hands of the twenty-four maids under Nangong Yunshan, and the divine soldiers in the hands of the young men of Awen's Thunder Department, all of which he refined with the method of group refining.

At that time, he was only refining twenty or thirty magic weapons and divine weapons at the same time, and he didn't try to refine hundreds or thousands of artifacts at once.

However, just because you haven't tried it doesn't mean you can't do it.

With Xin Yan's current level of refining, it may not be difficult for him to refine hundreds or thousands of sixth- or seventh-grade magic weapons at the same time, but if it is only a fourth-grade or fifth-grade demon clan battle equipment, it is not difficult for him.

For Xin Yan, the biggest problem is the material.

And now most of the seven thousand demon army under his command are not high, and the grade of refining seven thousand battle equipment for them does not need to be too high, only the fourth or fifth grade is enough.

This also means that he needs a lot of fourth- and fifth-grade materials.

Xin Yan is a refining maniac, carrying a large number of various materials with him, however, with the improvement of his cultivation, the materials he uses when refining weapons are becoming more and more advanced, and now most of the materials he carries are sixth- and seventh-grade materials, and there are not many fourth- and fifth-grade materials.

Xin Yan pondered for a while, and then had a plan in his heart. He asked the aquatic life standing beside him, "I heard that there is a star iron deposit under the Heavenly Star Peak on the side of this star, can you accompany me to take a look?"

"Obey!" "Shui Sheng is a native of the Shenmu Forest, he is very familiar with the geography of the mountains and rivers of the Shenmu Forest, and the production of items, he led the way, and introduced to Xin Yan: "The star iron ore reserves under the Tianxing Peak are extremely large, and the grade is also very high, but unfortunately, this star iron ore vein is accompanied by extremely hard black crystal, it is not easy to mine, and it is even more difficult to separate, so this mineral deposit was abandoned later." Back then, in order to find materials for refining demon weapons, I also went to the mine to see it. ”

"Well, if the star iron vein and the black crystal are mixed together, it will not be easy to separate them! no wonder this deposit has to be abandoned. "Xin Yan is a master of refining, and he is familiar with the characteristics of various refining materials. Black quartz is an extremely hard ore, almost as hard as the finest dark iron, and even the sharpest magic weapon is difficult to cut through them. However, this material has an inherent weakness, that is, it cannot be refined and melted by fire, and when the fire reaches a certain level, it immediately turns into a useless pile of stone slag. The worst thing is that the stone slag produced by it will also seep into the other materials that are refined with it, and it is almost impossible to separate, so that other materials are also embarrassed and useful because of their impure properties.

It is precisely because of this physical property that the ore black crystal has become something that all refiners avoid. Generally speaking, any vein contains black crystal, then the vein has no mining value.

"My lord, this is the abandoned mine!" said to Xin Yan, pointing to the weedy, cobweb-strewn hole in front of him.

Xin Yan followed the aquatic point, and through the gap in the weeds, he saw a black hole leading to the depths of the earth. He nodded quietly and said to Shui Sheng: "You guard here, I'll go down and take a look!"

"Don't be an adult!" Shui Sheng was anxious when he heard this, and stopped him repeatedly: "This mine has been abandoned for many years, and no one knows if there are any monsters and monsters lurking in it, in case it ......"

When Xin Yan heard this, he laughed: "If there is a powerful monster here, when it sees us coming, it will already come out to fight with us, how can it hide inside?" Besides, even if there is a demon beast spirit in it, Xin Yan is not afraid, the blue-eyed toad is an earthy spirit beast, and with it exploring and leading the way in front, he is not afraid of danger at all.

Shui Sheng knew that Xin Yan had high skills and many means, but he was still not at ease, and said to Xin Yan: "In this case, let the little one explore the way for the adult in front." ”

Xin Yan waved his hand and said: "How can there be so much danger in such an abandoned mine? Besides, I have the help of foodies such as blue-eyed toads, so there will be no danger." You just wait on this, if Fu Lei has any news, you will reply to me as soon as possible. After saying that, he went into the mine under the protection of nirvana, green cow, little dragon girl, blue-eyed toad, fire crow, nine-turn golden lotus and other foodies.

The mine cave is extremely narrow and long, the dark hole wall is glowing with a cold cyan light, Xin Yan is an expert in collecting ores, he knows at a glance that the black one is the black crystal, and the one with the cyan light is the star iron ore, and the grade of the black crystal and star iron ore here is not low, they are above the five grades.

Since there is a whole vein here, there must be more than four high-grade ore crystals in it, so he quickened his pace and followed the blue-eyed toad and other foodies towards the depths of the cave.

The blue-eyed toad is an earth-walking spirit animal, and it is no easier for it to travel underground, it runs fast in the labyrinth-like mine hole, and nirvana, green ox, little dragon girl, fire crow, nine-turn golden lotus and other foodies are also close behind.

"These foodies are running so happily, is there anything good in the cave?" Xin Yan saw that several foodies were all very excited, and wondered if the blue-eyed toad had found something good.

Thinking of this, he couldn't help but speed up his pace, and soon he came to a big hole, there were countless star iron ore crystals hanging on the top of the cave, like countless stars, flashing with a cold light, Xin Yan looked at it roughly, each piece was not lower than the top of the fifth grade, and there were also some sixth-grade ore crystals.

But to Xin Yan's surprise, the blue-eyed toad and other foodies didn't stop urging, and they also led Xin Yan to the depths of the mine one by one, and the deeper they went, the purer the quality of the Star Iron Ore was, and the higher the grade.

However, what made him feel a headache was that all the star iron ore in this vein was contained in black crystal, and if he didn't think of a way to separate the star iron ore from the black crystal, then these star iron ore could not be purified and utilized at all.

Probably because the star iron ore and black crystal are mixed together and cannot be separated, it is because even Nirvana, a foodie, is not interested in the star iron ore in this vein, otherwise, it would have already begun to feast.

"You must find a way to refine these star iron ores!" Xin Yan pointed his finger, and a wisp of divine power came out of his body and shot towards a protruding piece of ore.

"Dang!"

Hearing a clangling sound like metal impacting, a piece of ore was cut off and fell into Xin Yan's hand.

"It's so heavy!" Xin Yan checked it with his hand and found that this small piece of ore was surprisingly heavy. He pinched it with his fingers again, and found that the ore was unusually hard, and it was extremely difficult for him to crush it if he didn't use it.

"Well, if you talk about the hardness alone, it's almost as good as the sixth-grade Xuantie. Xin Yan quickly made an evaluation. In his opinion, even if he didn't refine it, simply grinding it into stone arrows and stone spears would pierce the ordinary five-grade shield armor.

However, he soon discovered that this ore also has a great weakness, that is, it is strong but not tough, brittle and easy to break. Moreover, this ore also has a fatal weakness, that is, if it is burned by flames above the fourth grade, it will immediately turn into a pile of stone slag.

"Could it be that this star iron ore and black crystal are mixed together, and it really can't be refined and separated?" Xin Yan also tried a lot of methods, trying to use flames to refine the star iron ore, but the results all failed without exception.

"Haha, you came here just to burn lime to play?" I don't know when the red demon ran out again, he looked at Xin Yan with gray hands and a depressed face, his face was full of schadenfreude. Since Xin Yan fused with the infant body, his ability has increased greatly, and even the Red Demon is no longer his opponent. Therefore, when he saw Xin Yan's deflated appearance, he was extremely happy.

"You dead ladyboy, don't make trouble for my brother!" Xin Yan glanced at the red demon, then grabbed a piece of ore weighing thousands of catties again and began to refine it. Having learned his lessons from the previous times, this time he chose the Icy Flame. As soon as his mind moved, a faint blue flame came out of his fingertips, and strangely, this flame came out, and the entire mine was instantly enveloped in cold.

"Heavenly Extreme Cold Flame! I can't imagine that this kid has actually refined such a powerful cold fire. The Red Demon couldn't help but be taken aback when he looked at the faint blue flame on his fingertips. The Heavenly Extreme Cold Flame is the most yin and cold flame, if a cultivator in the Dan Stage or the Yuan Infant Stage is contaminated with a wisp of it, it will be frozen into ice sculptures in an instant, and even their souls will be sealed by the Cold Flame, and they will never be able to escape. Even a master of the level of the Red Demon would never dare to touch it easily.

Under Xin Yan's manipulation, the dark blue Heavenly Pole Flame rose little by little, attached to the surface of the ore, like wisps of silk thread, refining the ore little by little.

"This kid's fire control technique seems to have grown again!" Even if he has always been picky like a red demon, he has to admit that Xin Yan's fire control technique is extremely mysterious, and it is difficult for even a fire control expert like him to do it.

Half an hour later, under the anxious gaze of the red demon, Xin Yan finally stopped, and the piece of ore that originally weighed thousands of catties had long since disappeared, replaced by a small pile of gray-white debris.

"Strange, what is the reason for this? It stands to reason that all minerals are either yang or yin, and if they cannot be refined by yang fire, then they must be refined with cold fire. But why can't they be refined? Could it be that they have missed something?" Xin Yanba pulled the lime in his hand, frowned, and pondered with a face.