There was no money, Qin Xuan felt the pain of having no money for the first time, Qin Xuan still had to buy some spirit stones, and a low-grade spirit stone cost 100 taels of gold.

Qin Xuan wandered around Donghua City all morning, and finally changed to Tongshang Qianzhuang to exchange for six lower-grade spirit stones, and returned to Huashan Sword Sect.

I want to find a place for alchemy, and then go to Senior Brother Shi and ask.

Senior Brother Shi said in surprise: "Senior Brother Qin is planning to refine the pill, you go to the Alchemy Peak to rent the Alchemy Land Fire Room, this is the map, you take my letter, but since the Alchemy Room is not my peak, you need five lower grade spirit stones a day!"

Qin Xuan: "It's okay, I'm just trying alchemy"

Senior Brother Shi: "Okay"

After adjusting for a few hours, Qin Xuan brought all the medicinal materials and came towards the Alchemy Peak!

Qin Xuan arrived at the door of Lian Dan's room with Senior Brother Shi's letter, and an old man asked, "What are you doing?"

"In the next, Qin Xuan, the door of the refining weapon peak, wants to borrow the earth fire for use, and in the next is planning to refine some pills, so I hope to arrange a ground fire room with more stable and milder firepower, please bother!"

Before he came, Qin Xuan had inquired with Senior Brother Shi about the general situation of the Earth Fire Land, and knew that this place arranged people to use the Earth Fire by room, so he said this.

"This is easy to do, and I will arrange it for my junior brother immediately! It's just that this fee is ......," the old man said with some embarrassment.

Qin Xuan smiled slightly when he heard this, and as soon as he stretched out his hand, he took out 5 lower grade spirit stones, handed them to the old man, and said slowly in his mouth:

"How many spirit stones should be paid, of course they will be delivered according to the standard!"

"Hehe, hee, okay, I'll arrange it for my junior brother!" The old man saw that Qin Xuan had given five low-grade spirit stones, and his heart suddenly burst into joy.

He immediately led Qin Xuan to the huge multicolored stone gate, and took out a red arrow-shaped item from his bosom and aimed it at the stone gate.

The red light on the red arrow flashed, and a ray of glow flew out from it, hitting the door accurately, and immediately making the colorful streamer turn rapidly. As a result, after a few loud "creaks" and "creaks", the stone door slowly rose, revealing a black passage behind the door. This passage is a few feet high and square in shape.

"Senior brother, after this Fire Cloud Dao, it is a room with earth fire, let's go over now!" the old man squeezed out a few smiles and said to Qin Xuan.

"Hmm!" Qin Xuan nodded noncommittally, and walked into the passage first.

"Although this tungsten stone is not a rare thing, it is not an ordinary material in the world. It was possible to find so many at once, and use them as bricks and stones to build passages and houses, and it took a lot of effort to get it from the first county lord of Huoyun County at a great price. However, with the strange characteristics of tungsten stone's high temperature resistance and not being afraid of earth fire smelting, this land of earth fire has never had any major accidents since it was opened!" the old man said with a bit of a jog as he led the way in front.

Qin Xuan was very interested when he heard this, and he couldn't help but touch it with his hand on the black stone wall on one side, and the result was slippery and cold!

"Where is this tungsten stone produced? It is really strange that it can resist earth fire, which is three points more powerful than real fire. Qin Xuan said with a rare opening in agreement, and asked casually.

"Well, I heard that although it is not too rare, it is not from my Huoyun County, it is from Tungsten Gold County!" the old man explained.

In this way, Qin Xuan followed behind the old man, and in the blink of an eye, he passed through two other stone doors that were also tall, and finally walked out of the tungsten stone passage and appeared in a large rotunda.

This hall is also made of tungsten stone, but the diameter is forty or fifty zhang, and the height is more than ten zhang, which is really huge and shocking! Around the hall, red stone doors of the same size are evenly distributed, and there are more than 30 rooms.

At this time, there was no one in the hall, only the old man and Qin Xuan, who had just arrived.

After Qin Xuan looked at it curiously, when the old man saw this, he immediately took out a white jade plaque and pasted it on the door, and the white stone door opened automatically. Then, the old man and Qin Xuan entered the house.

This house is a square building, the area is average, only seven or eight zhang in size, but in the center of the house there is a round dun with a width of a zhang, and there is a fist-sized gourd hanging on each of the four walls, and there is an emerald green futon in the corner of the wall not far away.

Yuandun is also made of dock stone, and is very flat, only half a foot high. But on the outside of Yuandun, there are eight fiery red miniature dragon heads, which are lifelike. Moreover, the mouth of the dragon's head is slightly raised, which is just aimed at the sky above the center of Yuandun, and the spitting posture is very realistic.

After seeing the situation in the house clearly, Qin Xuan was slightly surprised, but before he could ask, the old man had already walked to the vicinity of Yuandun and took the initiative to explain to Qin Xuan.

"Senior brother, this is the earth fire mouth of this house, and the earth fire needed for alchemy is spewed out from these eight dragon heads. And according to the need, the size and height of the flame can also be adjusted by itself, and the specific driving method is engraved on the outer wall of the stone pier. The old man pointed to Yuandun's explanation.

But then he pointed to the four gourds on the wall and said:

"These gourds are filled with Martian sand, which can temporarily strengthen the power of the earth fire, if the junior brother feels that the temperature of the earth fire is not enough, he can use this to temporarily increase the power, but it will not last too long. In addition, you can put away this jade plaque by yourself. As soon as the door was closed, it was cut off from the outside world. Unless it is the joint efforts of several monks of the Yudan Period, no one will be able to enter from the outside, so although the junior disciple can rest assured, no one will disturb him!"

When Qin Xuan heard this, he was secretly happy in his heart, such a completely closed environment was exactly what he needed, and his face couldn't help but show a little joy!

At this time, the old man saw that the explanation was almost over, so he said goodbye and left.

The process of refining the elixir is very complicated, first of all, the spirit grass must be refined into Dan Qi, and then in the continuous boiling of the fire, it is gradually condensed into Dan liquid, Dan dust, and Dan pills, and finally after the "gathering of spirits", every link in the middle is crucial, and the slightest carelessness will affect the quality of the final Dan.

There are nine kinds of elixir, which are divided into five qualities: green, white, red, purple and gold, that is to say, the same elixir, the higher the quality, the rarer and more precious, and the price is doubled.

Generally, it is considered a success to be able to refine Qingdan, while Bai and Chidan prove that the alchemist's attainments are very profound, and Zidan and Jindan are simply unavoidable and perfect.

However, on top of the golden pill, under a very small probability, or through special techniques, several elixirs beyond the conventional grade will be obtained, which are divided into flawless, creation and natural selection.

But when it comes to simplicity, it's hard to do!