"Hehe, as the saying goes, cultivation methods and classics are divided into high and low grades, and materials containing the power of laws naturally have their own advantages and disadvantages. The specific exchange ratio depends on the quality of the items you offer, Fellow Daoist," the tall man said with a smile.

Hearing this, Wang Yu pondered for a moment, then with a flip of his wrist, a strange walnut with a human-face pattern appeared in his palm.

As soon as this object was taken out, it immediately emitted a rich earth-attribute aura.

"Fellow Daoist, please take a look, how about exchanging it with this?" Wang Yu glanced at the illusory man and asked.

The illusory man was taken aback at first, subconsciously took half a step closer to Wang Yu, but immediately stopped, and said with a seemingly indifferent smile:

"This Earth Grandson Fruit does contain a trace of earth-attribute law power, but it is not very strong. If you use this to exchange, Fellow Daoist, you will need at least ten of them."

"So this thing is called Earth Grandson Fruit..."

Wang Yu thought to himself, but his face did not change at all. He was not in a hurry to speak, just looked at the illusory man with an unchanged expression, without saying a word.

The man sighed inwardly, thinking that Wang Yu had seen through his reality when he couldn't help but take that half step just now, so he changed his words and said:

"If you have Earth Grandson Fruits of better quality, Fellow Daoist, I will reluctantly part with five of them."

Hearing this, Wang Yu smiled slightly, stretched out two fingers, and said calmly, "Two."

"Fellow Daoist, this is a bit unreasonable. Although my Black Sea Heavy Water Scripture has some flaws, it is also a genuine high-level Earth Immortal cultivation method. Two Earth Grandson Fruits cannot be exchanged for it." The illusory man waved his hands repeatedly and said.

"Although this cultivation method seems good, I'm afraid you know better than anyone else whether it's just a slight flaw, right? I have to say, it's definitely enough for me to exchange two rare spiritual fruits for a useless item." Wang Yu said with a chuckle.

"Two Earth Grandson Fruits are really not enough. Add one more, Fellow Daoist, and exchange it for three... how about that?" The illusory man hesitated for a moment after hearing this, and still said with some hesitation.

"Adding one more is not impossible, but... you need to answer a question first, Fellow Daoist." Wang Yu said after pondering for a moment.

"Just answer a question?" The illusory man was slightly stunned, and said with some doubts.

"Yes, I believe you must know the answer to this question, Fellow Daoist." Wang Yu said with a smile.

"Please ask, Fellow Daoist." After thinking for a moment, the illusory man nodded and said.

"To be honest, although I occasionally obtained a few Earth Grandson Fruits, I know very little about their effects. I hope you can clear up my doubts." Wang Yu said like this.

The illusory man was stunned when he heard this, and then said with a wry smile: "You asked the right person, Fellow Daoist. This fruit is a special kind among many earth-attribute spiritual fruits. It enters the earth and germinates in 100,000 years, becomes a tree in a million years, and condenses the power of earth to bear fruit in 10 million years. It is an excellent material for refining earth-power Immortal artifacts and high-level Dao soldiers."

"I see, thank you for your guidance, Fellow Daoist. Let's complete the transaction now." Wang Yu smiled slightly.

The illusory man didn't say anything more, just nodded silently.

So, the two of them raised their palms at the same time, and each had an object flying out of their palms, flying towards the vortex in the center of the array.

The difference was that Wang Yu had three human-face walnuts emitting earthy-yellow light, while the illusory man had a virtual shadow of an ancient book.

Seeing the three fruits fly into the vortex, they disappeared with a flash of light.

After a while, a ray of light lit up on the array again, and an ancient book with a cyan-black cover slowly flew out of the circular vortex.

Wang Yu stretched out his palm to catch the ancient book, and immediately moved his spiritual sense to check it roughly. After finding that there was nothing unusual, he looked at the illusory man.

The other party had just finished checking the three Earth Grandson Fruits, clasped his fists at Wang Yu, and disappeared with a slight shake of his figure without saying anything.

Wang Yu smiled, knowing that the other party felt a little annoyed because he had suffered a secret loss, so he didn't care, put away the ancient book, and turned his gaze to the array again.

Now that he had the high-level Earth Immortal cultivation method, he was still short of materials for refining the Earth Transformation Body.

Wang Yu originally planned to use this Earth Grandson Fruit as the main material for refining the Earth Transformation Body, but now that he had decided to cultivate this Black Sea Heavy Water Scripture, he naturally couldn't use this fruit and needed to find a main material containing the water law.

Now it seemed that this shouldn't be a difficult task.

He raised his hand towards the barter exchange on the array, then put the Earth Grandson Fruit on it, and marked the requirement of exchanging it for materials containing water-attribute laws.

Judging from the current performance, although this Inconstant Alliance seemed mysterious, its sphere of influence was obviously not limited to the Black Wind Sea, and the number of members in the alliance should be quite large, otherwise it would be impossible to form such a huge transaction scale and category.

In other words, since Earth Grandson Fruit was a precious earth-attribute spiritual fruit, it shouldn't be difficult to exchange for materials containing the same water law.

After doing these things, Wang Yu waved his hand to withdraw the virtual shadow of the cyan array in front of him, then sat cross-legged, took out the Black Sea Heavy Water Scripture, and carefully read and comprehend it.

As he expected, in just seven or eight days, several people contacted him through the mask, expressing their desire to exchange.

Wang Yu didn't trade immediately, but waited for a few more days, and then compared the ten or so materials repeatedly before making a decision, choosing a material called "Coagulated Sea Crystal".

The water law contained in this object was extraordinary. It was very compatible with the Black Sea Heavy Water Scripture in all aspects. It was said that a small piece the size of a fingernail condensed the essence of the vast ocean of thousands of miles, so the preciousness of this object far exceeded the Earth Grandson Fruit. He almost used up the remaining Earth Grandson Fruit in his hand, and even added some other spiritual materials, before he managed to exchange for enough of this object.

After all the things were prepared, Wang Yu immediately began to retreat.

Spring went and autumn came, and more than a year was almost a blink of an eye for the True Immortal Realm.

During this period, Wang Yu continued to cultivate Soul-birthing Flowers through Green Liquid, and at the same time, he studied the Black Sea Heavy Water Scripture day and night, making the final preparations for refining the Earth Transformation Body.

On this day, a hundred thousand miles away from Crow Montain Island, somewhere on the seabed.

The seabed here was uneven, and there were mountain-like rocks standing tall, which at first glance looked like a mountain range on the seabed.

These rocks were dark red in color and had uneven surfaces, which were formed after the lava cooled.

Vaguely, one could see black holes on the seabed, dark and secluded, not knowing where they led.

This was a group of submarine volcanoes, which often erupted with huge volcanic eruptions, so few people came here.

On a flat ground on the seabed, a huge hemispherical blue shield was opened, isolating the surrounding seawater from the outside, and the inside was completely invisible from the outside.

Inside the magic circle, a figure in a green robe was sitting cross-legged in the center, it was Wang Yu.

Around him, more than a dozen huge stone pillars stood scattered, and in the middle was a fire-attribute magic circle engraved with crimson runes.

After a long time, he slowly opened his eyes and murmured with a solemn expression.

The crimson array under him suddenly buzzed and operated, and the surrounding dozen stone pillars bloomed with dazzling crimson light, illuminating the surrounding seabed for several miles through the surrounding blue shield.

He pinched his fingers, and as the array operated, the surrounding ground began to shake rumblingly.

After a while, he let out a low shout.

Crack!

At the very center of the array, a place with a diameter of about ten feet that was not engraved with array patterns, suddenly appeared cracks, revealing a large hole.

Inside was a piece of bright red, and from here one could clearly see not far from the ground, streams of rolling magma, and rolling flames attached to the magma.

These flames were faintly reddish-gold in color. They were not ordinary magma ground fires, but a kind of strange fire called deep-sea ground fire, which could blend with seawater and coexist, and its power was several times stronger than ordinary ground fires.

A strange heat force radiated from the cave, and the surrounding seawater rolled.

Wang Yu's figure flickered and appeared near the entrance of the cave. After sitting down again cross-legged, his hands and ten fingers also shot out into the air in a row.

The surrounding array suddenly operated a few points faster, emitting a dazzling red light, and strands of red light flew out from the array and wrapped the faint golden ground fire.

The surging ground fire suddenly became docile, like a wild horse, being slowly tamed, and as he pinched his fingers, it changed into various shapes with extremely flexibility.

Seeing this, Wang Yu's face gradually relaxed a little. With a wave of his arm, a row of materials of various colors appeared beside him.

With his current level of mana, it was impossible to refine these materials at all, so with a flash of inspiration, he thought of using the power of this deep-sea ground fire.

With a wave of his hand, a piece of white crystalline ore material flew out and submerged into the ground fire.

He pinched his fingers, controlling the flames, and wrapped the material.

I don't know how long it took, the white crystalline ore slowly melted and turned into a mass of translucent white liquid.

After observing it slightly, he waved his hand again, and another material flew out and submerged into the flame...

In the blink of an eye, a month had passed.

The materials around Wang Yu had now been basically put into the ground fire and refined, mixed together, forming a light blue ball the size of a millstone, rolling gently in the flame.

His face was a little pale, he took out a Cloud Crane Grass and swallowed it, his face slowly recovered, and he waved his hand to take out a dark blue crystal the size of a bowl.

The crystal was crystal clear, and from the outside, one could clearly see the pure blue light contained inside, trembling gently like a wave of water, and a powerful water law fluctuation radiated from it.

This thing was the Coagulated Sea Crystal.

Wang Yu took a deep look at the crystal in his hand, took a deep breath, waved his hand, and threw the object into the ground fire in front of him.

Under his control, the ground fire was layered over and wrapped the dark blue crystal.

At this moment, a layer of light blue water light suddenly appeared on the surface of the crystal, flowing non-stop, making the whole stone look like a small ball of clear water, crystal clear.

The deep-sea ground fire, which was enough to melt gold and iron, was immediately isolated by this seemingly ordinary light blue water light, and could not penetrate into it at all.