Looking at this strange object, Gu Feng couldn't help but ask, "What is this?"

"This treasure is amazing, I call it 'Dan Qi Recycling Horn'!"

Ouyang Xue said with a bit of smugness in her eyes.

"Dan Gas Recycling ......"

Gu Feng was a little foggy.

Not to mention Gu Feng, even if it is an old fish, I have never heard of such a treasure.

And Gu Feng looked at it, this treasure item level was only a quasi-immortal treasure, and it was not a real treasure at all, and his brows immediately furrowed slightly.

Because of the contribution value of 100,000, you can exchange for a thousand immortal stones, basically the most ordinary first-order immortal treasure on the market is one thousand immortal stones.

"That Gu Feng, don't look at this thing as a quasi-immortal treasure, but for an alchemist, it is priceless, this thing can absorb the exhaust gas generated by the failure of alchemy, so that the waste gas generated after your alchemy will not pollute the surrounding heaven and earth immortal qi!"

Ouyang Xue spoke.

"That's it?"

Gu Feng frowned slightly.

"Ah, this should be the only one!"

Ouyang Xue hesitated and spoke.

"You haven't used this thing before, have you, used me as a test subject?"

Gu Feng looked at Ouyang Xue's appearance and spoke.

"Gu Feng, it's not that I don't want to use it, it's that my Yin Actress doesn't have an alchemy master at all, I refined this thing, I originally wanted to sell it to the seven Dan Dao masters in my Spirit Ginseng Star District, not to mention those few Dan Dao masters, even those alchemy apprentices can't afford to buy, so I keep smashing it in my hands!"

Ouyang Xue reluctantly spoke.

“......”

Gu Feng was speechless for a while, feeling that Ouyang Xue was fooling himself with a waste product that no one wanted.

"Elder Gu Feng, you believe me, this thing must be useful, if it is useless, I will compensate you with other things in the future!"

Ouyang Xue's eyes were full of pleading.

"For now!"

Gu Feng was helpless, and he could also see that this Ouyang Xue was really poor.

Although the resources in her hands are not enough, most of the refined treasures are quasi-immortal treasures, but at a glance, Gu Feng has hundreds of semi-finished products and finished treasures piled up in this house, obviously these hundreds of treasures are all quite strange, and they have not been sold, how many resources does she have to consume.

"Haha, Elder Gu Feng, you are really a good person, if you want to create any treasure in the future, as long as you have enough materials, just come to me!"

Ouyang Xue smiled and spoke.

Gu Feng then left and returned to his cave.

"Before alchemy, you must first familiarize yourself with the knowledge of plants and trees!"

Gu Feng muttered to himself, and then in his mind, dozens of classics that the old fish gave to Gu Feng appeared.

After a day and a night of sorting, Gu Feng found that on these different herbal books, there are many herbs introduced, all of which are duplicated, but even so, there are 10 million types of herbs recorded in these classics.

At that time, Pisces Immortal Venerable was the master of an immortal domain, and he had unimaginable resources, for Dan Dao, although Pisces Immortal Venerable was not good at it, he also attached great importance to it, so he collected so many classics.

And in the sorting of these herbs, Gu Feng found a pattern again.

It is a high-level herb, which naturally evolves from a low-level herb.

Some are low-level herbs that have been transformed over the years, some are cultivated in a special environment, and some are mixed cultivation and metamorphosis of several herbs.

In general, these high-level herbs are all made from low-level herbs.

After another day and a night, Gu Feng summed up a million basic herbs!

The remaining nine million herbs were all transformed from these million low-level herbs.

For example, first-order herbs, light fire grass.

If it grows naturally for thousands of years without dying, it can transform into a second-order herb, Yeyan Grass.

And if this light fire grass is placed in a place where yin qi is pervasive, it is possible to transform into a second-order herb, yin fire grass.

And how to plant this light fire grass and daffodil grass together, you can transform into a second-order herb, twin water fire grass.

......

In this way, these second-order herbs that have been transformed can also be transformed into third-order herbs in different ways.

And this million kinds, first-order herbs, can be said to be the basis of all the herbs that Gu Feng knows here.

"As long as I memorize these million basic herbs, and slowly derive them based on these herbs, I can completely control these ten million herbs as quickly as possible!"

In Gu Feng's eyes, the light flickered.

Immediately, Gu Feng began to learn about this million basic herbs.

"This sword bull flower, how does it seem to be somewhat similar to the Tieyun flower I have seen in the Nether, but it contains immortal energy......"

Under Gu Feng's understanding, he found that most of these herbs actually had the same aura as the ordinary herbs he had seen in the Nether.

After slowly exploring, Gu Feng found that many of these immortal flowers and wonderful grasses in the starry sky were evolved from ordinary herbs in the Nether, just like the immortal path cultivators were all cultivated from martial arts martial artists.

This time, a large part of Gu Feng's pressure was relieved.

When he was in the Netherworld, Gu Feng studied herbs very deeply, and now more than half of these million basic herbs have a sense of déjà vu, so it is easier to learn like this.

And alchemy, Gu Feng naturally will not stop, he will do it with two purposes, Gu Feng can do this when he is very young.

So, while in my mind, learn these first-order herbs.

Here, Gu Feng once again gave birth to the second order of the herbs he bought, and then took out the demon refining furnace, the extreme yang fire ignited, and then continued to refine the Water Spirit Yun Yuan Dan.

Gu Feng has never been obsessed with alchemy, and the reason why he wants to do alchemy is because he wants to practice faster.

Now that he was comprehending herbs and alchemy, Gu Feng felt that his cultivation was steadily improving, and once he learned alchemy, he could swallow a large amount of auxiliary pills in the future, and his cultivation speed would be faster.

"That's right!"

Gu Feng thought and took out the horn that was connected to the black box underneath.

This thing was named 'Dan Qi Recycling Horn' by Ouyang Xue, and Gu Feng also wanted to see if this thing was useful.

"Boom!"

After a stick of incense, there was no accident, Gu Feng failed to refine the pill again.

Bursts of black smoke flew out of the Dan furnace.

In the past, these smokes would be deposited in the cave, affecting the air circulation, and even making the immortal qi in the cave become impure, which made Gu Feng very distressed.

And Gu Feng waited for a while, and found that this horn didn't seem to be useful, so he couldn't help frowning slightly.

"Wait, this thing is a quasi-immortal treasure after all, and it can't run on its own, so I need to use immortal power to urge it!"

Gu Feng thought, bent his fingers, and smashed a piece of immortal power into the black box under the speaker.