"Poof!-"

The oncoming sparks were extremely fast, directly hitting Yun Zhan's body, and countless dazzling sparks burst out in an instant.

Yun Zhan's skin was also scorched black, and he only felt as if countless needles had pierced his body, making him a little painful, and the scorching fire qi passed through the skin, deeply into the meridians, flesh, and bones, and these fire qi were like countless sharp swords, constantly passing through Yun Zhan's body.

"Po! po!"

Four more sparks rose at the same time, attacking in four directions, hitting Yun Zhan in an instant, and the fire qi attached to it also drilled into Yun Zhan's body.

"It hurts!" Yun Zhan only felt that the fire in his body was like an earthworm, shuttling between his meridians, flesh and blood, and bones, and every time he passed, Yun Zhan felt like he was being scraped his bones, which made him a little painful.

"However......" Just when Yun Zhan wanted to give up, Yun Zhan found that these fires also brought him great benefits at the same time, and every time the fires passed, although they would make Yun Zhan miserable, they also took away the impurities in his body.

If people eat grains and grains, they will have three disasters and nine diseases, this is because the body is mixed with too many impurities, and the sword cultivation of the acquired realm is to eliminate the impurities in the body as much as possible through cultivation and strengthen the strength of the body, so it will first refine the flesh and blood and then the bones.

And Yang Dingtian also said that he would use Yun Zhan's body as a sword to refine, and use Tianyi Divine Fire to forge his body, and the first step in casting a sword is to remove the impurities of raw materials, and Yun Zhan is now being used as a raw material, and constantly removing impurities from his body with divine fire.

Thinking about this, Yun Zhan immediately sat down cross-legged, and let the sparks from the escape of Tianyi Divine Fire collide with him, not dodging or dodging, but the fire qi drilled into his body, not only making him extremely painful, although the impurities in his body were removed, but after all, he was flesh and blood, and this divine fire was like a knife, which not only took away the impurities in his body, but also destroyed his physical body at the same time.

Yun Zhan gritted his teeth and endured the pain, while silently using his magic skills to repair his body, otherwise he would not wait for the impurities in his body to be removed, and his own flesh and blood would already be blurred!

In this way, Yun Zhan sat cross-legged on the fire lotus transformed by Tianyi Divine Fire, allowing the Divine Fire to continuously temper his physical body, while repairing the damage with magic skills.

In a trance, I don't know how long time has passed, it seems to be a short day, and it seems that a long year has passed.

During this period of time, Yun Zhan's physical body has undergone amazing changes, after taking the fire dragon flower given to him by Situ Dashao, he has already reached the peak of the six heavens of the day after tomorrow, and his flesh and blood have been refined to the fullest, and he is only one step away from reaching the level of bone refining.

And now, under the tempering of Tianyi Divine Fire, as the impurities in his body are removed step by step, his strength has also risen, and he has directly stepped into the range of the Seventh Heaven of the Day After Tomorrow.

If you can see through Yun Zhan's body, you can find that Yun Zhan's blood at this time is like a rainbow, his flesh is like steel, and his bones all over his body seem to be made of white jade, crystal clear and transparent, and the breath exuded from his body is probably not much better than the wild beasts that have always been known for their strong physique.

"Bang!-"

It wasn't until Yun Zhan's physical body reached such a level that the fire lotus transformed into a divine fire that day turned into a flame again after a crisp sound of the glass version, and returned to the Nine Heavens Divine Fire held in Yang Dingtian's hand.

"This Divine Fire Forging Body is really powerful!" Sensing the changes in himself, Yun Zhan was also surprised, feeling that his physical body at this time, I am afraid that in the acquired realm, no one can beat it, and only the innate powerhouse who has condensed the innate sword qi must be the strongest among them to be able to suppress him from the physical aspect.

In particular, he noticed that his strength was moving forward again, and jumped to the seventh heaven of the day after tomorrow, and he could clearly feel that the golden sharp qi in his meridians was also refined more pure, and the golden sharp qi was also a kind of sword essence, and Yang Dingtian used the method of forging swords to temper the physical body for cloud warfare, and the golden sharp qi would naturally be tempered with it.

"Boy, how much have you comprehended?" Yang Dingtian's voice came.

At this time, Yang Dingtian was much weaker than before, and the remnant soul had become more blurred, obviously as he said, as time went by, his remnant soul became weaker and weaker, I am afraid that it would not be long before it would ......

"The seniors manipulated the Divine Fire, and tempered the juniors a total of 1,796 times!" Yang Dingtian used the Divine Fire to forge his body, which brought him great benefits, and he also respected him a lot with Yun Zhan's title.

I only heard Yun Zhan continue: "Among them, the seniors tempered the juniors nine hundred and eighty-four times with tough methods, removed most of the impurities in the flesh for the juniors, and then tempered the juniors eight hundred and twelve times with feminine techniques, consolidating the flesh for the juniors!"

Yun Zhan even counted how many times Yang Dingtian manipulated Tianyi Divine Fire and tempered himself in what way, which shows that when he was forged by the Divine Fire, although he endured unimaginable pain for ordinary people, he still comprehended the sword-forging method that Yang Dingtian used on him.

However, Yun Zhan felt so attentively, after Yang Dingtian heard it, he frowned, obviously not very satisfied with what Yun Zhan said.

"But these are just differences in technique!" only listened to Yun Zhan's words, and continued: "According to the younger generation, the real sword forging method mentioned by the predecessors can be summed up in one sentence, that is, 'a hundred refinements can become steel'!"

"Oh!?" Hearing this, Yang Dingtian's eyes lit up.

Yun Zhan said seriously: "As the predecessors said before, the real sword-casting technique does not rely on the use of sword patterns, nor does it require the high-end of the sword-casting materials, if it is really attentive, it is an ordinary piece of mortal iron, after hundreds of tempering, removing impurities, it can still cast a peerless sword!"

When Yang Dingtian heard this, he immediately showed a relieved expression, and nodded: "Very good! But in less than a day, you can comprehend the truth of this, which is very rare!"

In fact, the truth of 100 refining into steel is very simple to say, but how many people can really do it!

This is why those swordsmiths will spend a lot of effort to study the sword pattern in order to improve the quality of the sword, but these are some tricks after all.

Even if it is the most precious divine gold material, it is still difficult to guarantee that it will not be mixed with some impurities, and it needs to be continuously tempered before it can be removed, but this process is too time-consuming and labor-intensive.

Although this method seems to be able to forge a sword, or even a holy sword, in the shortest possible time, it is absolutely impossible to forge a divine sword!

Because the material that completely removes impurities cannot last long after all!