The lava at the center of the earth is the closest to the star source.

A star source is the source of a planet's aura.

Today's earth has entered an era of the end of the law, the aura of heaven and earth has dried up, but it has not died, and there is still a weak aura between heaven and earth, so the source of the earth's aura must have not dried up, but only entered a sunset stage.

But the closer you get to the source of the aura, the richer the aura of heaven and earth you feel.

However, the source of spiritual energy on any planet has the natural formation protection of this planet, natural power, earth, fire, thunder, wind, etc., for example, the lava in the center of the earth is a natural power that blocks outsiders from approaching, and ordinary innate powerhouses dare not enter.

And this is just the periphery of the lava in the center of the earth, the deeper it goes, the more dangerous it is, all kinds of dangers, the strong people above the Jindan Yuanying realm will be disillusioned, unless they have the strength of the virtual realm, otherwise they can't get close to the source of spiritual energy.

Moreover, only the strong who have entered the Dao realm can directly shatter a planet and extract the source of the spiritual energy of a planet with their heads and feet.

Now Jiang Feng and his party can only be on the periphery of the lava, this temperature is just the highest temperature they can bear, even if they are ten or twenty meters deep, they will be melted, if they want to go deep into the center of the earth and enter the vicinity of the source of spiritual energy, it is simply impossible.

But even so, the aura here is much richer than on the ground.

Therefore, although Jiang Feng consumed a huge amount, it only took less than three hours to recover as before, and the aura here was even more pure, and he felt that the spiritual power in his body had been cultivated a lot.

Although there is still a bit of a distance to enter the eighth layer of Qi training.

But cultivating here is indeed the best, but unfortunately, this is not a place where ordinary people can stay for a long time, even if they have the protection of the Nine Dragons Alchemy Array now, they will not be able to survive here in the lava for a long time.

When Jiang Feng's cultivation was restored, soon, his second furnace of elixir began to be refined.

But in the end, it still failed when it was Rongdan.

There are two reasons for this, the first is that his cultivation is not enough, and alchemy is best to have cultivation above the foundation, so many alchemy apprentices can only work in the realm of qi training, identify medicinal materials, and understand the various medicinal powers of medicinal materials, but cannot independently alchemy, because above the foundation realm, spiritual power can maintain the needs of alchemy, and now his spiritual power is very insufficient, unable to maintain the changes in refining mudras, and unable to keep up with the changes in the smelting of pills.

And the second point is that his alchemy technique is a bit handy, the former Tai Nongzi is only a great master of Lingzhi after all, even if he has some attainments in alchemy, but for alchemy, he has not been able to be familiar with the depths of the soul, this body has no alchemy instinct at all, so he must have time to familiarize himself.

A day later.

Jiang Feng recovered again, he gritted his teeth, and began the refining of the third furnace of Zhuji Dan.

Jiang Feng knew that he only had five chances, because it took him so long, or Dongfang left to prepare, and he could only gather enough medicinal materials for the Five Furnaces to build the foundation pill from the channels of the ancient martial arts world.

The medicinal materials needed for Zhuji Dan are not very precious, most of them are first-grade elixirs, and some of the main medicines are second-grade elixirs, but this is the earth, the earth of the end of the Dharma era, even in the ancient martial arts world, there are not many medicinal materials that can be gathered.

If he failed five times, then this time he would have completely failed in refining Tsukidan.

"Failed again!"

The third alchemy Jiang Feng was very careful and worked hard, but he still failed.

When condensing the pill, an unexpected mistake in his technique finally caused the flame to go out, and the pill failed to condense, and the medicinal power dissipated in an instant, leaving less than thirty percent, unable to become a pill, and turned into a waste pill again.

"I don't believe it, I'm the sect master of the Immortal Immortal Sect, and I can't even refine the Zhuji Dan!"

Jiang Feng's heart was red and ruthless, he directly swallowed two ginseng pills, and then meditated for half an hour, his spirit and spirit returned to his peak, and while the iron was hot, he immediately began to refine the fourth furnace of pills.

"Master, why don't you take a break!"

Dongfang Li looked at Jiang Feng, who was a little crazy, and cautiously advised.

"No!"

Jiang Feng's eyes were red, looking at the golden flames that were burning, and he said confidently: "I will definitely succeed!"

The refining of the elixir in the fourth furnace began.

The first step is to refine the medicinal power, after the previous three exercises, this time it is much more perfect than before, and the medicinal power is much purified.

The second part is to smelt the medicinal power.

He pinched the seal with both hands, and the flames of the Nine Dragons Dan Furnace were golden and bright, constantly smelting all kinds of medicinal powers, smelting them together.

"Twenty percent!"

"Forty percent!"

"Fifty percent!"

Jiang Feng didn't dare to be greedy, for him, even if it was just a low-grade Zhuji Dan, as long as he could refine it, he would already be very lucky.

He began to condense Dan.

"Condensation!"

He let out a low roar, his hands changed his handprints, and the golden flames changed in seven colors, as if a flame hand had condensed all the medicinal power in the palm of his hand, and five thumb-sized pills gradually emerged.

"It worked!"

Jiang Feng's eyes burst with a glint of joy.

I really didn't expect that in the past, he was not so happy when he refined more than six or seven grades of pills, but he was so happy when he refined the Zhuji Dan of only three grades, is this the so-called sense of achievement?

"Success?"

Dongfang Li's eyes widened, he swallowed a mouthful of saliva, looking at the five pills, his eyes were burning.

His innate sense of touch could sense the powerful medicinal power in these five pills.

If he eats it, he may be able to break through the long-coveted half-step Grandmaster realm.

"Snort!"

Kurono Lang, who had become a big fat snake because he had eaten too many waste pills and had indigestion next to him, was crawling with joy, and at this time he also stared at the snake's eyes, looking at these five pills, and instinctively had a feeling that he would eat these five pills at all costs.

"Quick, put it away, don't let the medicinal power dissipate!" Jiang Feng let out a low sigh.

"Good!"

After all, Dongfang Li is a congenital powerhouse, and he has endured the heart-wrenching pain caused by the madness for decades, and his will is extremely strong, and he quickly came to his senses, and quickly took out five small porcelain bottles and filled the elixir.

"It's finally a success!"

Jiang Feng wiped the cold sweat from his forehead and said a little breathlessly.

This time the alchemy is too expensive.

It's not just the spiritual power in his body, it's more his spiritual power, and the tension every moment makes him a little dizzy.

"There's another stove!"

Jiang Feng calmed down this time, he meditated in the lava in the center of the earth for three days, restoring his spirit and spirit to its peak state, before starting the refining of the fifth furnace of Zhuji Dan.

With his previous success, this time he is not only more confident and proficient, but also has the courage to do his best.

"Thousand Refining Fire Seal" he broke out to the twelfth refining.

These first-grade and second-grade elixirs were purified by him to an extreme.

And in the second step, smelting medicinal power, he was more careful and bold.

"Thirty percent!"

"Fifty percent!"

"Sixty percent!"

"Seventy percent!"

He wanted Dan to become a medium-grade product, so he smelted more than seventy percent of the medicinal power in one go, but fortunately he succeeded.

But at this time, the spiritual power in his body began to dry up.

However, he had already prepared, and directly ate a ginseng pill, and a steady stream of ginseng medicinal power entered his body to replenish the depleted spiritual power on the meridians.

"Condensation!"

Success or failure, fight here.

In the midst of the golden flames, five round and smooth pills of the same size were revealed.

"I made it!"

Jiang Feng couldn't help but drink a little.

This is a medium-grade Zhuji Dan, he has refined a three-grade Zhuji Dan by cultivating the Qi Realm, or is it a mid-grade Zhuji Dan, if this is spread out, the great master of the universe who does not know the young alchemy wants to accept him as an apprentice.

"Haha, it's worthy that I've been hiding for so many days, it's really a good thing, bring it!"

At this moment, an earth-shattering sound wave erupted from the lava, and a large flame hand burst out of the lava, and then fiercely penetrated the Nine Dragons Dan Array, grabbing five freshly baked Tsukidans with one hand.