The Earth Fire Department is dozens of feet underground, and the building above it is a palace.

The outside of the palace was covered with a layer of magic light, and colorful runes loomed one after another, flashing Chu He's eyes: there were propylene fire runes, and Gengjin runes...... I don't know how many runes are in this protective array.

Before he got close to the palace, Zhang He used the token to punch out the identification magic light, and let the magic circle open the formation door. Chu He is the role of the token given by Zhang He yesterday in Zhilu Dao: it turned out that it still had the function of passing, and he thought it was useless, so he lost it in the storage ring and did not touch it.

Listening to Zhang He, the access authority of the token is also high and low. Like your own, you can only use it alone, and if you bring one more person, it will provoke a magic circle attack. He solemnly asked Chu He to remember this.

The deacon's token can bring one more person in, and more than one person can't.

After passing through the passage of more than ten zhang behind the formation gate, he had to use the token to play two or three magic lights along the way.

At the gate of the palace, there were two disciples of the Innate Realm guarding them, and when they saw Zhang He coming over, they all leaned over to greet him.

After introducing Chu He to each other, it was time to enter the palace.

Before he even entered it, there was a strong smell of medicine. The light fragrance of Qingling grass, the fishy smell of Jiuhuang, and the smell of Yiyang leaves similar to the fragrance of tea...... It became a flavor that is difficult to describe.

When Chu He saw everything in front of him, he couldn't help but marvel.

The palace is very high, more than ten zhang high. There are rows of neat tall sandalwood shelves inside, and each layer is arranged with a talisman array, and all kinds of medicinal herbs are placed in the talisman array, and some disciples are busy in it.

Along the way, Zhang He explained to Chu He what he saw: This is the storage place of medicinal herbs in the Earth Fire Department. The rune arrays in each sandalwood frame are different, and each has its own effect and purpose, which can maintain or enhance the quality of the herb.

At the end of the palace, there was a hole of more than a few zhang, and a white jade step more than a zhang wide rotated down, and from time to time there were disciples coming and going in a hurry.

The more he walked down the jade steps, the scorching aura he felt was stronger, and there was also the smell of sulfur, all of which was not much worse than the fire veins that Chu He had explored before. This shows that the power of the underground fire vein is much stronger.

At the end of the jade steps is a wide passage that slopes downward, and above the passage is inlaid with night pearls, emitting a faint white light. Although the night pearl emits a white light, there is a faint layer of red light in the passage, which should be a scene that can only be presented when the fire spirit is abundant.

On both sides of the passage are stone houses with only doorways, but the doors are sealed by stone doors, and there are talisman prohibitions on them. There are more than 20 stone houses carved out of the rock formation, and there are steps at the end of the passage, so I don't know what the scene is underneath.

Zhang He acted as a guide at this time, explaining the situation of the Earth Fire Department in detail: The Earth Fire Department was divided into two floors, each with more than 20 Dan rooms.

The firepower of the upper layer is suitable for refining eighth- and ninth-grade pills, while the lower layer is suitable for refining sixth- and seventh-grade elixirs.

Obviously, with the cultivation of the Chu River, he could only stay at the upper layer first, and it was still close to the white jade steps.

What Zhang He gave to Chu He was the key plate of the No. 26 stone house of the second class, which happened to be in the first two rooms of the sort. It should be the two rooms with the weakest power of earth fire, and the more you go down the ramp, the stronger the power of earth fire that can be used in the Dan room.

Thousands of high-rise buildings rise from the ground, as long as the cultivation is enhanced in the future, this will naturally have the opportunity to move inside. Zhang He thought that Chu He would have some pimples in his heart, so he encouraged endlessly. He was a little optimistic about this junior disciple, of course, he hoped that he could quickly grow into an alchemy expert.

Although it has its own independent Dan room, the task completed is not light. A new disciple like Chu He also delivered three hundred top-grade Yiqi Pills to it every day. After completing the quest, for the rest of the time, the Dan Room user can use the Earth Fire to refine their own elixir. ...,

Chu He secretly counted it himself: if the technique is skillful, there are more than 20 to 30 pills in one furnace. With the help of earth and fire, the burden of using the spirit yuan will be much lighter, even if it takes about an hour each time, then refining three hundred, it will take nine or ten hours to complete it. Perhaps this time decreases as proficiency increases.

In other words, if the user of the Dan Room does not take a break, he can use the Dan Room to serve himself for about two hours. At this time, if you can bake more than fifty or sixty top-grade Qi Pills, you can earn more than five or six hundred low-grade spirit stones when you sell them back to Aokitang, which doesn't seem to be a very good treatment.

Thinking of this, Chu He's mind floated up the sweatshop of his previous life, and compared with the two, it seemed that they were really a little similar.

The task of 300 top-grade Yiqi Pills is to use the additional conditions of the No. 26 to No. 9 stone houses, which can also be converted into 100 lower-grade Peiyuan Pills. And No. 8 to No. 1 are medium-grade Pei Yuan Dan.

After listening to what Zhang He said, Chu He couldn't wait, that is, he wanted to start refining the high-grade Yiqi Pill.

Zhang He saw that he was so anxious, and he also had the heart to point out on the side, and he was accompanying him as an audience.

As soon as you open the door of the stone house and enter, the hotter air rushes into your face, giving people the illusion of scorched hair in a trance.

Inside is a few zhang square area, there is a ventilation setting, and you don't feel stuffy.

The inside of the stone house is very monotonous, all around it is empty, only a circle of strange cyan wood is paved in the middle, and the wood is densely wood-based runes, even if there is no spirit element drive, all the runes are very smart, and there should be a rune array in a series.

In the middle of the wooden circle is a small circle of red stones, on which the fire rune is imprinted, and the red stone is built into a fire outlet.

At first glance, the middle arrangement is like a big trap and a small circle, and there is a circle inside the small circle.

There is a round-bellied three-legged iron tripod pressed on the top of the fire outlet, and the light red earth fire sprang up from the fire outlet from time to time with one or two wisps of it, and collected the bottom talisman of the iron tripod.

Zhang He is indispensable for a detailed explanation.

Cyan wood is a green wood that grows in the depths of the North Sea, which is very rich in the atmosphere of green wood, and it is better to carry the wood rune array.

The Crimson Stone is a flame stone, which can be blessed by the rune array to release the power of the fire element when needed, and can absorb the earth fire element when it is not used in ordinary times.

This ring is a ring that uses the principle of wood to make fire, and it is transformed and superimposed layer by layer, which can instantly add powerful firepower and can be maintained for a period of time.

Originally, the firepower generated by the earth fire and the medium-grade Xuantie Ding was enough to refine the lower-grade Pei Yuan Dan!

Through the magic circle of the stone house, a disciple soon sent ten materials.

Although the disciple sent the materials and retreated as soon as possible, Chu He could clearly see his look of envy.