The first thing Zhang Yuanhao did when he got the jade slip in his hands was to soak his spiritual sense into it, and deeply remember the Dan Fang in his sea of knowledge.

In fact, he now has at least a thousand kinds of pills in his mind, these are all pills in Dan Yuanzi's memory, and as soon as his spiritual sense is refined by Zhang Yuanhao, it will naturally become his memory.

While the spiritual sense was probing the Dan Fang in the jade slip, Zhang Yuanhao's brows were also deeply furrowed.

This elixir is a little difficult to refine!

Zhang Yuanhao can be sure that Dan Yuanzi has not come into contact with this Dan Fang, because in the memory fragment of his Dan Realm, Zhang Yuanhao could not find the slightest relevant matter. In other words, Dan Yuanzi had never refined the Ancient Zhuji Dan.

Therefore, Zhang Yuanhao must also study and refine this pill by himself.

It's not easy!

According to Yu Jian's description, the ancient Zhuji Dan is a human-level second-grade elixir, and the difficulty is much higher than that of the current Zhuji Dan.

The current one Zhuji Dan and the three Vice-Pills are just Bao Dan, even if they are all added together, they are not even worth the price of a spiritual material, how can they compare to the Gu Zhuji Dan that requires three spiritual materials for the main medicine alone.

The first-grade spiritual material of the human level is solid Peiyuan grass, the first-grade spiritual material of the human level is three-star purple leaf orchid, and the third-grade spiritual material of the human level cleanses the dust flower.

There are countless other treasures and medicines, so I won't list them one by one.

The materials on Zhang Yuanhao's body couldn't even make up one-tenth of the auxiliary medicines, let alone make up a medicinal material for refining the ancient Zhuji Dan. It's just a dream.

"You have to find a way to gather a few more materials!" Zhang Yuanhao frowned with some distress.

Through Dan Yuanzi's memory, I learned that there was a medicine garden in the Yimu Palace, but he didn't cultivate enough now and couldn't enter it.

But if there are no materials, how can you do alchemy?

Zhang Yuanhao was pacing in the palace with a sad face, and suddenly a spiritual light flashed in his mind, and he couldn't help but laugh.

Speaking of medicinal materials, the last thing he lacks is this, because he has the assistance of a mysterious wooden box, as long as there are enough spirit stones, most of the medicinal materials should be able to catalyze it.

And the seeds, Yimu Xinggong also has them, all of them are stacked in the medicine preparation warehouse, and the most important thing is that the strength of its array seal is weaker than that of Dandao Yujian's array seal, and Zhang Yuanhao can easily crack it.

"Fortunately, I have enough high-grade spirit stones on my body!"

Coupled with the top-grade spirit stones on Fang He's body, Zhang Yuanhao had more than two hundred top-grade spirit stones on his body at this moment, which was enough to mature two hundred spiritual materials. Suddenly, Zhang Yuanhao couldn't help but feel a little grateful to the mysterious woman he met in the black burning city.

......

It was easy to find a large number of seeds needed to refine the Gu Zhuji Dan in the medicine preparation warehouse, and Zhang Yuanhao directly took ten copies of each of them, and then used them first, and if they were not enough, they could get them again.

It took three or four days for Zhang Yuanhao to finish ripening all one of the materials, and after thinking about it, Zhang Yuanhao was still ready to wait for the three materials to ripen before trying to refine the Dan again, after all, he had never refined the Gu Zhuji Dan, and the certainty of success with only one material was not very large.

Several days passed, and Zhang Yuanhao finally finished ripening the three materials, and immediately prepared to open the furnace for alchemy.

This time it was a spirit pill to be refined, which was no better than a low-grade elixir, so Zhang Yuanhao was going to use a high-grade spirit stone as fuel, which could stimulate a spirit stone flame of more than 8,000 degrees, and this temperature was completely enough to refine an ordinary human-level spirit pill.

As soon as the flame of the eight thousand degrees of spirit stone ignited, an extremely hot aura permeated dozens of zhang, if it wasn't for Zhang Yuanhao's cooling array in advance, then his robe would have been ignited by the high temperature at this moment.

With a slap of the Dan furnace, the lid of the tripod was shaken high, and Zhang Yuanhao immediately put a few medicinal herbs into it, and then closed the lid of the tripod.

Unlike the refining of low-grade pills, refining Bao Dan and even Spirit Pills requires taking into account the principle that a variety of medicinal materials are mutually reinforcing, so there is also a sequence of condensing pills, which is often extremely difficult for many Dan masters to control.

As soon as the spiritual sense moved, several ordinary medicinal herbs had already been dissociated, and several clusters of medicinal liquids of different colors floated in the Dan furnace, wrapped in Zhang Yuanhao's spiritual sense, and heated carefully.

When—

After a while, Zhang Yuanhao shook open the lid again, threw in a few herbs, and then reapplied the plan, dissociated it, and obtained a few more balls of medicinal liquid. The cycle went back and forth several times before Zhang Yuanhao finished dissociating most of the excipients in turn.

A fine layer of sweat appeared on his forehead. At this moment, in the Dan furnace, Zhang Yuanhao's spiritual sense had already been divided into forty or fifty parts, trying his best to control the temperature of each mass of medicinal liquid.

"Hey!"

Zhang Yuanhao roared in his heart, his spiritual sense moved slightly, and several masses of medicinal liquid that had reached boiling mixed together in an instant, producing a reaction. In an instant, forty or fifty portions of liquid medicine were mixed into a dozen or so servants.

Taking out a purple flower with a little star from the storage ring, Zhang Yuanhao glanced at it cautiously, and then threw it into the Dan furnace.

Next is a hurdle.

He's going to dissolve a spiritual plant!

Unlike the dissociation process of ordinary herbs or precious materials, the dissociation of spiritual materials depends on external objects, and if only spiritual dissociation is used, the best effect cannot be achieved, which will greatly affect the purity of Cheng Dan.

The most common way to dissociate spiritual materials is to use a special dissociation magic weapon, but Zhang Yuanhao doesn't have this kind of thing on him, so he can only use a method that is almost completely eliminated at the moment.

That is quenching dissociation.

This is a great test of the alchemist's ability to control the spiritual sense, because if he is not careful, the fireworks will burn the spiritual materials to ashes.

A pure white spirit stone flame like cow's milk was picked up by Zhang Yuanhao and thrown into the Dan furnace. With the entry of the spiritual flame, a heat wave suddenly spread, and Zhang Yuanhao hurriedly isolated many medicinal liquids, only to let the three-star purple leaf orchid slowly approach the pure white fireworks in the Dan furnace.

Just an inch closer to the spiritual flame, the spiritual material had already begun to melt, turning into a viscous purple liquid.

This is the time!

Zhang Yuanhao's eyes narrowed, and the medicinal liquid turned into spiritual materials shot into the spiritual flame in an instant, staying for about a tenth of a breath, and Zhang Yuanhao controlled the medicinal liquid to fly out again.

Quenching is to burn in a flame far beyond the boiling point of the liquid medicine in a very short period of time, and the spiritual sense must control the liquid medicine to thin layer by layer in this very short time, and instantly burn the impurities in it clean, without damaging the essence of the liquid medicine, which is a great test for the alchemist's spiritual sense control.

It's done!

As Zhang Yuanhao's mind moved, the pure white spiritual flame in the Dan furnace was extinguished in an instant, and the dark purple liquid was controlled by Zhang Yuanhao and floated less than three inches from the bottom of the Dan furnace.