One zhang, ten zhang, one hundred zhang, one thousand zhang.

An hour later, Yang Zhen went down a thousand feet.

However, at this time, he found that with his sinking and the use of the Nine Shadows Technique, his speed was getting faster and faster.

It's not that it's easier to walk underground, it's his magical power that slowly adapts to the new environment of the fairy world.

By the end of the second hour, Yang Zhen had already reached more than 3,000 zhang underground.

The more he went underground, the more shocked he became.

The underground of the fairy world is like the bottom of the sea, the waves are magnificent, the colors are colorful, and all kinds of things, materials, and even herbs can be seen.

'Purple Golden Sand', 'Xinggang Stone', 'Green Wood', 'Fire Silver Crystal', these rare and very rare human materials in the Henggu Continent, can be seen everywhere in the underground here.

Yang Zhen understood why the immortal world was different, everything was extremely hard, and the entire underground was a condensation of various materials and ores.

Of course, these materials are very precious in the human world, but they are worthless in the fairy world.

Because they are all materials for refining high-grade artifacts, they can't be regarded as materials for immortal weapons.

Three hours later, Yang Zhen's Nine Shadows Retreat Technique became more and more familiar, as if he had completely adapted to the immortal realm, and he had already dived 10,000 feet underground.

After 10,000 feet, the ground becomes refreshing, and layers of rocks are densely arranged.

There is less material of all kinds, mainly a large number of rocks.

"Where will the ore veins generally be?" Yang Zhen suddenly remembered and asked Zhu Ruowu on the ground.

Although he and Zhu Ruowu are far away, Zhu Ruowu is his believer, the two have a heart-to-heart connection, Yang Zhenshen moved, and Zhu Ruowu above knew what Yang Zhen asked.

"Fengyuan City is huge, thousands of miles long from east to west, and the ore veins below must be huge, as long as you see the fairy crystals, with the number of fairy crystals, you will definitely be able to find them. "Zhu Ruo has no way.

Yang Zhen nodded.

Hu Xiaofei said that the real veins are divided into four levels.

It is called first, second, third, and fourth grade veins.

The first-level ore vein is a small city like Zhongsheng City, which is basically a low-grade immortal crystal, and the second-level ore vein is a medium-sized city like Fengyuan City, which is dominated by medium-grade immortal crystal.

The city is thousands of miles long, and this vein is estimated to be the least tens of miles.

Yang Zhen's house is in the center of the city, as long as the luck is not too bad, it will be found quickly.

Sure enough, five hours later, Yang Zhen didn't remember diving tens of thousands of feet underground, and sporadic immortal crystals began to appear around him.

He saw that there were many immortal crystals over there, so he dived over there.

In six hours, Yang Zhen's immortal qi was greatly consumed, so he stopped and hid in the magic weapon to rest for a while, and then continued to hurry.

Eight hours later, a large number of fairy crystals appeared in the ground, into pieces of fairy crystals, one in the east and one in the west, like plum blossoms and rocks contrasting with each other.

The immortal crystals here can still be mined, but they don't count the center of the vein.

But this point of immortal crystal digging is more difficult, and the number is not attractive, another Yang Zhen, even if ordinary immortals come here, it is estimated that they do not want to waste time.

Yang Zhen continued.

There are more and more fairy crystals.

At first, you can see hundreds, then thousands, tens of thousands, hundreds of thousands.

A large number of immortal crystals appeared in front of Yang Zhen's eyes, and Yang Zhen now has a net worth of billions, of course, he doesn't care about these hundreds of thousands.

Especially this kind of underground immortal crystal, it is extremely difficult to excavate, and it will not waste time.

It's just that when he keeps flying over, when he sees the dense fairy crystals in front of him, he will have a feeling of heartbeat.

After diving underground for more than ten hours.

After Yang Zhen's demonic fire passed through a layer of immortal crystals and rocks, it pounced, and suddenly the front was empty, and he came to an underground lava cave.

"Have you arrived?" Yang Zhen was ecstatic and turned into a human form.

This underground lava cave is not known how many thousands of zhang below the ground, and the immortal aura in the surrounding air is particularly thick, reminding Yang Zhen that he is about to approach that vein.

He looked around, under his feet, behind him, above his head, there were immortal crystals everywhere, dense, and everywhere.

If you can dig here, you can also dig up tens of millions of medium-grade immortal crystals.

But in this kind of place, ordinary immortals really can't come down.

He estimated that he had descended to the bottom of more than 100,000 feet underground.

Ordinary Xuan Immortals don't have a suitable magic weapon, so it is impossible to reach here, let alone dig the immortal crystals here.

Yang Zhen is not interested in digging these millions, for him, as long as he intended, the immortal crystals here can be mined anytime and anywhere.

He needed to see if he could let his Jindan practice now.

There are no bearing coordinates underground, but immortal energy is the best indicator.

There is a strong fairy aura, and there is close to the vein.

Yang Zhen will walk along the lava cave for a while, and when there is no road, it will evolve into a ball of demonic fire, and when there is a road, he will turn into a human to walk.

While walking and flying, after half an hour, brushing, the eyes suddenly brightened, and a thick fairy aura that made people almost faint came.

Yang Zhen sucked hard, almost choking.

"Ahem" has never been discovered, immortals can choke people.

Then Yang Zhen felt that something was wrong, and when he touched his nose, it was all water.

The air turned out to be the same as water vapor, and it was full of water.

"Liquid immortal energy?" Yang Zhen was ecstatic.

The immortal qi was originally gaseous, but in the ore vein, it solidified into a liquid state, which shows the density of the immortal qi.

Countless Dao Immortal Qi can condense a drop of liquid Immortal Qi.

Therefore, the real immortal crystal veins can continue to evolve into pieces of immortal crystals.

If Yang Zhen could really dig up a vein and put it in the magic weapon, he would be able to generate a steady stream of immortal crystals by himself.

But this kind of thing, he can only think about it now, not to mention that he is not capable of doing this, if he really does it, he will make the immortals in the world despise it, and the entire immortal world is wanted.

This is the cultivation path of tens of millions of immortals in a city, even the most treacherous and evil people dare not do this kind of thing easily.

"It's wonderful. "Even Yang Xia came out of the magic weapon.

She and Yang Zhen stood side by side, the air was very humid, and after standing for a while, her clothes were full of water droplets.

These water droplets are not ordinary water, they are immortal qi condensation, and the liquid immortal qi floats here from the second-level ore veins and permeates the surroundings.

Seeing the liquid immortal qi, the real second-level ore vein was almost in front of him.

The two of them strode forward side by side, the lava cave became bigger and bigger, and after walking more than a hundred steps, the sound of rushing water was faintly heard in front of them, and the immortal aura in the air became stronger and stronger.

There are more and more liquid fairy qi like water vapor, and there is a feeling of morning mist in front of me, ethereal and faint.

"Look. At this time, Yang Xia pointed forward with his hand in surprise.

There is a milky white long river in front of it, the river is choppy, the waves are rolling, and when every drop of waves flies into the air, there is a sense of visual strength.

They finally saw the true ore vein, the second-grade immortal crystal vein.

This vein is like a long dragon, lying horizontally under Fengyuan City, with a width of only a few dozen zhang, but dozens of miles long.

The river water is all liquid immortal qi, and every drop of immortal qi is more than a hundred times thicker than the unparalleled and long water vapor in the air, and the rocks are full of immortal crystals.

These immortal crystals were originally rock and soil, perennial on the edge of the vein, evolved by the immortal qi, turned into immortal crystals, and then used by the people of the entire Fengyuan City, the immortal crystals slowly disappeared, and then the ore veins produced new immortal crystals, and the cycle began again and again.

Yang Zhen and Yang Xia stood in place, feeling only one word.

"Thick"

The fairy aura is too strong.

It is so thick that it chokes the nose, chokes people, and if you take a breath, the whole nose will be plugged.

If you can practice here, the effect will be at least twice as fast as practicing in the stone cave of Hu Xiaofei in Fengyuan City.

Of course, Yang Zhen was still about ten zhang away from the river at this time, and if he could go ten zhang further and jump into the river to practice, it would be at least ten times faster.

It's simply a holy place for cultivating immortals?

Yang Zhen suddenly felt that he had found a good place to practice.

Suddenly, I felt that the identity of the Hu family's guest secretary was not important, even if Fengyuan City couldn't stay, it was better to stay here and practice.

"It's so immortal. Yang Xia couldn't help but go forward.

"Don't. Yang Zhen was taken aback and hurriedly grabbed her. "There are prohibitions. ”

Yang Xia stood up in shock, and then felt a flower in front of her, less than ten inches away from the front of her nose, a runic light flashed.

"Hiss" Yang Xia's face turned green.

That's just ten inches away.

If Yang Zhen hadn't grabbed her, she would have taken a step forward and directly bumped into the ban.

The air here is full of liquid immortal energy, which affects the line of sight, and if you don't pay attention to observation, it is really not easy to find these prohibitions.

"With such a strong immortal qi, in the future, your time array can be opened, and you can practice here for a year, and others will practice for ten years. Yang Xia said happily.

"Well, and it's not easy to come down, and others can hardly come down, unless they dig a hole all the way down, I don't know how long it will take to dig for what year or month. ”

It is impossible to dig a hole down, dig a hole into the ground, I don't know how long it will take, it is easy to be discovered.

So it's really safe and convenient to practice below.

"Let my Jindan try. Yang Zhen was overjoyed, his mind moved, and boom, Jin Dan left his body and appeared in the void.

"Ah" Yang Xia was startled, and hurriedly stepped back.

No matter whether this Jin Dan meets a person or an immortal crystal, as long as there is immortal energy, it will be frantically absorbed, and Yang Xia does not dare to approach.

However, at this time, after Jin Dan appeared, he clearly felt the thick immortal aura around him, as if Yang Xia had been directly ignored by him.

"Buzzing" Jin Dan began to hover, Yang Zhen closed his eyes and did not move, his mind felt, that Jin Dan breathed like a human being, and every time he inhaled, the liquid immortal qi around him surged towards Jin Dan like a tide.

After a while, it rained in the sky.

"Hiss" Yang Zhen and Yang Xia gasped at the same time.

Jin Dan absorbed the liquid immortal qi, attracted all the liquid immortal qi within ten zhang of Fang Yuan, and then gathered together, like a misty drizzle falling towards Jin Dan.

With the absorption of Jin Dan, Yang Zhen felt bursts of powerful immortal qi surging in his body like a frenzy.

Usually he cultivates with immortal crystals, and the immortal qi is added one by one, but now it is increasing one by one, wave by wave.

The immortal qi in his body rose rapidly, and his strength also rose steadily.

Yang Zhen believed that as long as Jin Dan could stay outside, he would be able to be promoted to the middle stage of the Golden Immortal in less than a year.

However, his golden pill can't be outside all the time, it was originally going to decay after an hour, and recently the immortal qi has increased, and the time spent outside has also been a little longer.

After an hour and ten minutes, the Jin Dan began to decay, and Yang Zhen estimated that he would have to wait another ten minutes to put away the Jin Dan.

At this moment, boom, above his head, there was a sudden earth-shattering explosion, as if some powerful magic weapon was tearing through the earth.

"Oh no, someone's coming. Yang Zhen's face changed greatly.