Senior Brother Wen smiled bitterly and shook his head, "I wanted to go in and get a hundred-pound thunder stone, but I was almost killed by lightning. I didn't expect that Junior Brother Su, you could actually get such a big piece."

"Senior brother, is there anything I should pay attention to when refining weapons?" Su Xiaofan's heart moved and he asked for advice.

“The first thing is to purify it!”

Senior Brother Wen didn't hide his secrets, and said: "You must first purify Thunder Gold from this Heavenly Thunder Stone. Remember, the purer the Thunder Gold you extract, the better!

I heard that the thunder stone can also purify a metal called thunder gold essence, but it is very rare. It is estimated that only a few hundred grams of it can be extracted from a thousand pounds. Please try to see if you can refine it."

"So the weapon-refining material our ancestor mentioned was thunder gold?"

Hearing Senior Brother Wen's words, Su Xiaofan had already realized in his heart that it seemed that he had done something extra to repair the system and purified the Thunder Gold Essence in one step.

"Then there's integration."

Wen Wenming looked at the backpack behind Su Xiaofan and said: "After you refine the thunder bamboo and thunder gold of that day, you must let the two be completely integrated before you can refine the rough embryo. There is a flying sword mold in the weapon refining room. You

You can choose the style.”

"Okay, senior brother, I will pay attention."

Su Xiaofan nodded. The steps that Senior Brother Wen mentioned later were all learned by Su Xiaofan in the weapon refining technique. He just had to act according to his own script.

"Without further delay, Junior Brother Su, please go over now."

Wen Wenming stood up, took out a porcelain bottle and handed it to Su Xiaofan, saying: "I don't know how long it will take for junior brother to refine it. This is my little wish..."

"Brother, what is this?" Su Xiaofan took the porcelain bottle and looked at Wen Wen with some confusion.

"It's the Bigu Pill refined by the sect. One pill can fill your stomach for three days. There are ten pills in it, which is enough for Junior Brother for thirty days."

Wen Wenming thought for a moment and took out a jade bottle from his body. "Give this Yuan-Building Pill to Junior Brother. If you run out of true energy when refining the weapon, a Yuan-Building Pill can restore 30% of your true energy. There are three

"

"Thank you, senior brother!"

Su Xiaofan was not polite and took the jade bottle over. One Yuan-Building Pill can restore 30% of one's cultivation level. This Yuan-Building Pill may be more useful in a fight.

Of the two elixirs, Bigu Pill and Buyuan Dan, Buyuan Dan is obviously more valuable. It can be seen from the containers containing the elixirs that one is made of porcelain and the other is made of jade.

"I'll send my junior brother there."

Wen Wenming showed his favor and immediately led the way to the weapon refining room with Su Xiaofan.

Su Xiaofan picked up the Sky Thunder Stone and followed behind. He originally thought that the weapon refining room was in this small building, but it was beyond his expectation.

After walking about fifty meters and arriving at the innermost room, a large iron door more than three meters high appeared in front of the two of them.

Civilization opened the iron door, and a cold wind suddenly blew out. Outside the iron door, there was a cave.

Perhaps it was because it was at the foot of the glacier. Except for the feet, the cave walls were covered with ice, and the temperature was at least twenty degrees below zero.

With a reminder to be careful of slippery roads, Wenming walked in first.

"Senior brother, is the weapon refining room underground?"

Su Xiaofan followed behind. Although the pace of the two of them was not very fast, they should have walked 700 to 800 meters in three minutes.

Moreover, Su Xiaofan discovered that the terrain gradually went downwards. After walking out for seven or eight hundred meters, he felt that he should be thirty or forty meters underground.

This grotto has traces of artificial excavation. It is very spacious and well ventilated. I didn't feel any stuffiness after entering.

"Yes, you have to get closer to the ground fire to draw it out,"

Wenming nodded and said: "It's a pity that this is not an active volcano. The power of the ground fire it draws is limited, and there are only three fire outlets. Fortunately, it is enough for us."

Leading Su Xiaofan, the two of them walked for about seven or eight minutes. The slope of the road became more and more obvious. Su Xiaofan felt that they were at least a hundred meters underground at this moment.

"Junior brother is young and is really good at cultivation."

Wen Wenming looked back and saw that Su Xiaofan was holding a boulder weighing nearly a thousand kilograms and walked so far without blushing and his heart beating, which showed that his cultivation was very solid.

"Senior brother has become a Yin Shen, so he is worth learning from."

Su Xiaofan smiled and complimented Senior Brother Wen. The only Yin Shen cultivator he had ever seen so far was Senior Brother Wen in front of him.

Of course, there might have been Yin Shen cultivators present on the day of joining the sect, but Su Xiaofan didn't notice it at the time.

"arrive!"

After arriving at a huge space, Wenming stopped and said: "No one is using the three refining rooms now. Junior brother can choose the one in the middle. The earth fire in that place is the most powerful."

"Okay, thank you, senior brother."

Su Xiaofan nodded and observed the space.

This space is about ten meters high and about thirty meters wide. It should have been opened manually. The grotto reaches the end here. The three large stone doors represent three refining rooms.

"Junior brother can put down the Dragon Breaking Stone when he is refining weapons, so that even if there are foreign enemies, he will not be disturbed."

Wen Wenming smiled and said: "Actually, you can let it go or not. Senior brother, I will protect you outside."

"Thank you, senior brother. I'll go then." Su Xiaofan saluted Wen Wenming and pushed open the stone door in the middle with the Sky Thunder Stone.

The stone door seemed to be three or four meters high, but Su Xiaofan felt very relaxed when he opened it.

After entering, Su Xiaofan closed the door with his backhand and lowered a huge door latch above. This should be the so-called Dragon-Breaking Stone.

The area of ​​the refining room is not small, it is fifty or sixty square meters, and there is a bed outside the door, which should be used for resting when people are sleepy.

I don't know how the ventilation was done, but in this almost airtight place, Su Xiaofan couldn't feel a trace of stuffiness.

In the middle of the refining room, there were many tools, including hammers and electric saws, as well as some molds, which Su Xiaofan guessed were used to make flying swords.

Near the back of the refining room, there is a stone platform raised above the ground like the mouth of a well.

The stone platform is round in shape and one meter high. There are several operating levers on the sides of the stone platform, and on the top of the stone platform, the large stove is suspended corresponding to the stone platform.

There was a table next to the stone platform, and a tablet computer was placed on the table. Su Xiaofan walked over and turned on the computer to read it.

"Is this using modernization to refine weapons?"

After seven or eight minutes, Su Xiaofan put down the tablet. There were instructions on how to operate the underground fire outlet and how to use the steel-making furnace.

"This earth fire is indeed extraordinary. No wonder they spent so much energy creating these refining rooms."

Su Xiaofan learned from the tablet that the maximum temperature of earth fire can reach 6,000 degrees Celsius, but it only takes 1,500 to 6,000 degrees Celsius to melt steel.

It can be said that earth fire can melt almost all metal materials and extract their essence.

Moreover, this ground fire outlet is also designed extremely cleverly, so that the high temperature will only act on the smelting furnace above, without making the temperature in the smelting room too high.

"Okay, let's be a steel worker."

Su Xiaofan came to the middle of the room and picked up the big hammer. He had to break the Sky Thunder Stone into pieces before putting it into the smelting furnace.
Chapter completed!