When I met Master Pu Yuan again, I was still in a cave, but this time the cave was a little special, because as soon as Li Rui entered here, he immediately felt a scorching air rushing towards him. Even Li Rui saw that Pu Shi, who had always behaved like an ordinary person, suddenly changed his momentum at this time, and instantly it seemed to turn into a sharp knife, splitting those heat waves from the middle.

However, Li Rui now has two kinds of true fire in his body, and he is ready to absorb seven more kinds of flames in the future, so he is a serious fire cultivator, these scorching qi waves may not be accustomed to or even dangerous for ordinary people, or immortals of other attributes, but for Li Rui, it is definitely a holy land-like existence, because those fiery qi waves are the purest fire attribute aura.

"How can there be such a strong fire attribute aura here?" Li Rui exclaimed directly.

"There is a fire attribute spirit vein underground, and I pulled it out with a formation. Not only can you use the Earth Fire Refiner, but it is also easy to cultivate! After Master Pu Yuan saw Li Rui, he gave a rare explanation to Li Rui.

"Master Pu Yuan!" Li Rui only noticed Master Pu Yuan standing there at this time, and immediately put his hands together and bowed down to Master Pu Yuan.

"Okay, you only have three days to observe, and in these three days, I will refine a bell-shaped magic weapon that integrates attack and defense and a sword-shaped magic weapon. It's up to you how much you can learn! Master Pu Yuan explained again.

"Yes!" As soon as he heard the magic weapon that Master Pu Yuan wanted to refine, Li Rui immediately showed gratitude. Because he could clearly feel that although Master Pu Yuan said coldly, he was actually very thoughtful.

Among all the magic weapons. What magic weapon is the most difficult to refine? That is a special magic weapon that integrates offense and defense, and it can basically refine the magic weapon of offense and defense. Most of the magic weapons can be refined.

And what magic weapon do the immortals of the fairy world like the most? Li Rui definitely couldn't answer this question before, but through this big purchase in Fang City. Li Rui can say with great certainty that the sword-shaped magic weapon in the Heavenly Court is the most numerous and widely used.

And what Master Pu Yuan is going to refine now is exactly a bell-shaped magic weapon that integrates attack and defense, as well as a flying sword, which is obviously specifically cultivating Li Rui.

After feeling Master Pu Yuan's intentions, Li Rui immediately focused all his attention and paid attention to Master Pu Yuan's every move.

Seeing that Li Rui was also ready, Master Pu Yuan did not delay any longer and walked directly to the inside of the cave. There was a platform-like position there, and Master Pu Yuan sat straight on it, and then quickly played a few magic duels with both hands.

Then Li Rui saw that a bottomless hole suddenly appeared in the middle of the cave, and then a person tall, a swarthy furnace came out of the big hole.

Immediately after that, Master Pu Yuan waved his hand again, and suddenly a red flame rose from under the dark furnace ding, and this flame was so red that it made people feel unrealistic.

"Shhh This...... Is this the Nine Shadows True Fire? Seeing this unusually red flame, Li Rui couldn't help but gasp. Because he could see at a glance that this was one of the ten true fires in the fairy world, the Nine Shadows True Fire, a kind of flame that came from the depths of the earth.

Master Pu Yuan didn't pay attention to Li Rui's surprise, but concentrated on the Nine Shadows True Fire. After almost an hour of this, when the black furnace ding was burned by the Nine Shadows True Fire and the whole thing turned red, Master Pu Yuan flicked it towards the furnace ding with one hand. Immediately, the lid of the stove flew into the air.

Then Master Pu Yuan began to throw things into the furnace, which contained ores and bones. Even Li Rui saw Master Pu Yuan throw a ball of liquid into it.

Although Master Pu Yuan did not explain, any of his movements could be seen very clearly by Li Rui. Especially the materials he put in, Li Rui also knows them, because there is identification of materials in the inheritance of Master Puyuan.

A total of nine materials were put in, and according to these nine materials, Li Rui immediately knew that Master Pu Yuan was refining a Nine Heavens Divine Thunder Sword, which was a special attack magic weapon that could store the Nine Heavens Divine Thunder and release it to increase its power when attacking, such a magic weapon is generally only possessed by immortals above the Taiyi Golden Immortal level, because only immortals above the Taiyi Golden Immortal can enter the Nine Heavens Cloud Layer to collect the Nine Heavens Divine Thunder.

After all the materials are placed in the furnace, the lid suspended above the furnace is immediately closed, and the flame under the furnace is violently burned again.

Because of the shielding of the furnace ding, it is impossible to see the process of refining the weapon with his eyes, so Li Rui directly moved his mind, and his divine consciousness entered the furnace ding, carefully observing the changes of the nine materials in the furnace ding.

The changes in these materials, as well as the laws of fusion with each other, as well as the temperature at which the flames are used, etc., are all things that Li Rui has to carefully observe and learn, because these are the real keys to refining.

Li Rui's divine sense was still very strong, so with the help of his divine sense, the nine materials in the furnace ding melted, fused, and then slowly turned into the shape of a sword.

Li Rui knew that whether it was the smelting or fusion of the nine materials and the final molding, Master Pu Yuan's divine sense was operating, and when the sword was formed, Master Pu Yuan's hands changed more and more quickly.

At this time, Li Rui's attention was focused on Master Pu Yuan, because now the way Master Pu Yuan's hands were changing was actually drawing a formation, and then he used his mind to punch the formation he had drawn in the air into the sword that was slowly taking shape.

The classification of immortal weapons and pills is somewhat similar, and the more general ones can be divided into upper, middle and lower levels, which are subdivided into nine grades, and the division of these nine grades is actually based on the formation that the magic weapon can hold. In units of nine, for every additional nine formations, the level of the magic weapon will rise by one grade.

For example, there are twenty-seven formations contained in low-level third-grade immortal weapons, forty-five formations in middle-level fifth-grade immortal weapons, and eighty-one formations drawn inside the top-level nine-grade immortal weapons.

"Nine Paths...... Eighteen...... Four or five ......! Li Rui watched Master Pu Yuan's every move intently, and at the same time, he secretly counted the formations drawn by Master Pu Yuan in his heart.

The first forty-five formations, Master Pu Yuan drew very easily, which showed that it was not difficult for Master Pu Yuan to refine intermediate immortal weapons, only when the formation was drawn to more than fifty, Master Pu Yuan's speed began to slow down. Especially when he broke through to the sixty-third realm, that is to say, the magic weapon in front of him had entered the ranks of high-level magic weapons, Master Pu Yuan's forehead was already full of sweat, and his face also showed a look of exhaustion.

"Sixty-six...... Sixty-Seven...... Come on! There are only five formations left...... No, there are only four formations left to reach the high-grade eight-rank immortal weapon. At this time, Li Rui was also extremely nervous, and even he ignored that he was learning art now. (To be continued.) )