The video takes stock of the heavens, starting with the Fire Dragon King Natsu!

Moving forward, the two soon found the volcanic spirit.

However, the spiritual power of the volcanic spirits was relatively low, and the two people easily obtained them and obtained the volcanic crystal core.

Next, the two went deeper and encountered higher-level volcanic spirits, which they also accepted.

At this time, Hisoka finally saw the crystal core of the volcanic spirit.

A fist-sized red volcanic crystal core appeared in Hisoka's sight.

"Is this the thing?" Xi Suo said.

"Yes! This is it." said the boy.

Hisoka reached out and grabbed the red volcanic crystal core.

Chapter 608 Obtaining the Volcano Crystal Core and Heading into the Volcano

At this moment, Hisoka suddenly felt that the volcanic crystal core was struggling constantly, as if resisting his touch.

"Don't move!" the boy shouted immediately.

But Hisoka ignored the boy and grabbed the volcanic crystal core.

"Not good." The boy's face changed drastically, "This thing is rejecting you, let it go quickly."

"Why? This is a volcanic crystal core!" Hisoka asked doubtfully, "Is it because the volcanic crystal core doesn't like you?"

As he said that, Hisoka threw the volcanic crystal core to the volcanic monster that was chasing him in the distance.

The volcanic monster swallowed the volcanic crystal core into its stomach.

Seeing this, Hisoka felt a little puzzled, wondering why the volcanic monster did this?

Could it be that the volcanic beast has a special physique and the volcanic crystal core is useless to him?

"This volcanic crystal core is useless against it." The boy explained.

"Oh!" Hisoka replied calmly, "Then what is the effect of this volcanic crystal core?"

"I don't know, and I haven't seen its effect, but it must work. Otherwise, why would the volcanic beast listen to your command?" said the young man.

When Hisoka heard this, he couldn't help but frown. He couldn't understand why the volcanic monster would listen to him?

"Okay, let's get out of here!" said Hisoka.

At this time, Hisoka looked at his right arm. There was a fiery red line on Hisoka's right hand, which looked like a flaming flower, and there was a drop of blood in the flaming line.

Hisoka dripped his blood onto that pattern, and immediately, the flame pattern emitted a red light, wrapping up the drop of blood.

The blood turned into ashes under the burning flames.

"It seems we have to find a way to figure this thing out." Hisoka thought to himself.

"We can't stay here for long." said the young man.

Hisoka nodded.

"I'll give this thing to you for safekeeping for now." Hisoka said, "If one day you feel that this thing is too heavy, or you become impatient, you can just throw it away."

"I understand. This volcanic crystal core is quite valuable to us." said the young man.

Hisoka nodded.

"I'll give this thing to you for safekeeping for now." Hisoka said, "If one day you feel that this thing is too heavy, or you become impatient, you can just throw it away."

"I understand. This volcanic crystal core is quite valuable to us." said the young man.

"Yeah." Hisoka nodded, "Let's go a little further inside. I can feel the heat. We should be there soon."

After saying this, Hisoka turned around and walked towards the depths of the cave.

The boy hurried to follow.

……

Soon, the two men saw a wall.

"Is this the wall?" the boy asked, "Are there other volcanic crystal cores in here?"

Xi Suo walked to the wall, stretched out his hand and touched the wall, and said: "There is a breath of crystal core on this wall. It seems to be the breath of volcanic crystal core. However, we have not found other volcanic crystal cores yet, and we don't know if this thing is real."

After saying this, Xi Suo continued to touch the wall. After a while, Xi Suo touched a fiery red crystal core on the wall.

"It's true." Hisoka said in surprise.

"Since it is a volcanic crystal core, we can also enter the volcano." The boy said.

Chapter 609: Fire Phoenix Pattern Array

"Come on, let's go in."

Two people walked into the wall. Hisoka placed his hand on the wall, and a hot breath surged up.

"The temperature here is not bad!" Hisoka exclaimed, and then he took the boy through the wall and went inside.

It was very dark inside and I couldn't see anything.

The two men walked forward in the dark, and soon, a light appeared in front of them. The two men's eyes fell on the light, and there was a huge mountain.

The mountain was fiery red all over, like a burning flame. In the center of the flame, there was a huge sphere. Around the sphere was a protective shield formed by a circle of flames, covering the entire sphere.

Hisoka and the boy approached the sphere and after careful observation, they discovered that the sphere was actually a volcanic sphere, except that its appearance looked like a round bead.

"This thing is very strange, it looks like a bead." The boy said, "In this case, I feel more at ease. This thing should not be dangerous."

Hisoka smiled and nodded. When he saw that the boy was relieved, his heart also settled down.

"This thing is a bit weird, I don't dare to pick it up rashly." Xi Suo said.

"Then let me do it!" said the young man, reaching out to pick up the volcanic crystal core, and then putting it in his storage bag.

"Okay, we can go in now." The young man said, "Although the volcanic crystal cores in here are not very useful, we still need to keep them well. We may be able to use them in the future."

"Yeah, okay." Hisoka said.

Two people entered the cave.

"Such a rich spiritual energy, this shouldn't be the belly of a volcano!" the young man said, "There should be a huge space inside, what are we going to do here?"

"I still don't know how to break the fire catastrophe." Hisoka sighed, "I just hope that this mission can be completed successfully and we can return."

"Let's go!" the boy said, "The place where we came in should be the belly of this volcano."

The two people walked out of the cave and saw a vast space outside. There were countless volcanic crystal cores in the space. There were so many of them that they had various colors.

The higher the grade of the volcanic crystal core, the more powerful it is, and the higher the grade of the volcanic crystal core, the better looking it is.

However, low-grade volcanic crystal cores only have one color.

Hisoka walked to the highest crystal and took it out.

This is a red crystal with a phoenix carved on it, and there is also a flame symbol on the crystal.

The flame symbol seemed to be formed by fire. Hisoka looked at the crystal carefully. The outer layer of the crystal did not have any defense. It was just pure stone and had no defensive effect at all.

The surface of this crystal is fiery red, but it is not ordinary red, but a deep red. Moreover, there is a wisp of flame in the center of the crystal, dancing on the surface of the crystal. This is an extremely mysterious formation diagram with a pattern of a fire phoenix on it.

Xi Suo studied it carefully and found that the purpose of this formation diagram was to break the flame symbol, but Xi Suo had not yet mastered this formation, so Xi Suo did not know what to do.

Chapter 610: Purple Crystal Core that Increases Physical Strength

After looking at it for a long time, Xisuo gave up because the formation diagram was too complicated. Xisuo was not a formation master and could not understand the essence of it at all. Xisuo could not understand the formation and could only see the basics of it.

“I don’t understand!” Hisoka shook his head and then looked at the fiery red crystal next to him.

"It seems that I can only wait until I am stronger next time to break this formation." Xi Suo said, and then picked up the crystal core next to him, which was a purple crystal core.

The purple crystal core looks very ordinary and has no special effects. However, there is a faint purple light on this crystal core. Xi Suo picked up the crystal core and took a closer look. Then, he felt the extraordinaryness of this crystal core. There seemed to be a very special aura wandering and flowing on this purple crystal core.

Xiso carefully sensed this spiritual energy, and soon, he felt some wonderful energy contained in the spiritual energy. Xiso used his spiritual sense to explore this strange energy, but when his spiritual sense just touched this energy, he felt a pain coming, which made him wake up immediately.

"So powerful!" Hisoka exclaimed inwardly. He knew that he almost became addicted to this energy. If it weren't for his powerful spiritual power, Hisoka would probably be a corpse now.

Xiso carefully felt the purple crystal core. The energy emitted by this purple crystal core was very soft. To Xiso, this purple crystal core felt like a towel. Xiso wrapped the purple crystal core and placed it on himself.

The purple crystal core was like a silkworm cocoon, wrapping Hisoka tightly.

"Such a strong energy!" Xi Suo said inwardly. This feeling was like a person who was suddenly bitten by a group of ants while sleeping. His whole body was in pain, but Xi Suo's mind remained clear. He felt the energy in his body and a satisfied smile appeared on his face.

"The energy contained in this purple crystal core is so powerful!"

A hint of excitement appeared on Xi Suo's face. He really made a fortune this time. However, this purple crystal core did not have the effect of helping to improve his cultivation. However, this purple crystal core could enhance his physical strength and soul power. If he absorbed all of this purple crystal core, then his physical strength would undergo a qualitative change, as would his soul power.

It would definitely be a good thing if all of these powerful purple crystal cores could be refined.

However, the most important problem now is how to get this purple crystal core. There is a barrier around this purple crystal core. It seems that in order to break this barrier, we must first defeat it.

This formation looks very complicated, but Hisoka can still feel the weak point of the barrier. Hisoka rushed directly towards the weak point of the barrier and punched it. Hisoka felt a tremor and his entire right arm felt a sharp pain.

"What a strong barrier!" Xi Suo said in surprise. The barrier was very tough and even a mid-level warrior like him couldn't break it. However, Xi Suo didn't believe it and punched again.

Another violent explosion occurred, and Hisoka's palm went numb, and the bones in his right hand were shaken.

Chapter 611: Finding the barrier that destroys the formation

Blood dripped from his right hand onto the ground.

Xi Suo quickly practiced his skills to stop the injury, and then he continued to bombard the barrier.

Boom boom boom!

A series of explosions sounded.

Hisoka's right arm kept shaking, and every attack caused him to feel a piercing pain in his right arm.

"What a powerful barrier!" Xi Suo frowned. It was worthy of being created by a ninth-level formation master. This barrier was really difficult to break. It seemed that it would take some time to break this barrier!

However, Hisoka was unwilling to give up and continued to try. He punched again and again. As a result, the barrier's protective ability became stronger and stronger. Each attack would take away a certain amount of Hisoka's strength, and Hisoka's right hand was almost broken.

However, Hisoka continued to attack again and again.

The defensive power of this formation is so strong that Hisoka cannot break it even if he tries every possible method.

"Who on earth created this formation? How can it be so powerful?" Xi Suo muttered to himself.

"Stop using brute force and find the flaw in the formation." The young man crossed his arms over his chest and looked at Hisoka coldly. After saying this, he closed his eyes, as if he was not going to pay any attention to Hisoka.

When Hisoka heard this, he immediately stopped attacking. At this moment, Hisoka's face became very ugly. Hisoka did not expect that his partner would be so arrogant.

"Hmph!" Xi Suo snorted and said, "I know."

After saying that, Hisoka sat on the ground and began to think about the loopholes in this formation.

Hisoka's mind was extremely quick, and he soon discovered that there was a pattern on the barrier. The pattern looked very simple, but if one looked closely, one could still see the complexity of the pattern.

"This is a formation." Xi Suo thought to himself.

Formations are a very peculiar existence. Formations and weapons are two different concepts, and formations are also different from martial arts. Some formations only require the arrangement of a formation to achieve the purpose of deterring the enemy. For example, arranging a large formation can achieve the purpose. Some formations only require the arrangement of a small formation, or even only require the arrangement of a small barrier to achieve a deterrent effect. There is also a formation that can be arranged into a huge killing formation, which can also achieve a deterrent effect. Some formations are some very simple killing formations.

This results in a large number of formations.

Xi Suo once read an ancient book, which recorded that some formations were extremely difficult to break. Some formations were even trapping formations that could trap you to death, so the power of formations was extremely terrifying.

This is the foundation of the formation. Moreover, this barrier has an obvious flaw, which is that it is very weak. Once Xi Suo forcibly destroys it, the barrier will break.

After figuring all this out, Xiso felt a little more at ease. As long as he could find the center of the formation and break it, all problems would be solved.

Xi Suo thought of a way. He used the ring in his hand as a weapon and then released it. Inside the ring, Xi Suo found something like a key. He gently pinched it, and with a click, the top of the ring was pinched open, revealing a black ring.

Chapter 612: Hisoka successfully breaks the formation

The surface of the ring is engraved with strange symbols.

Hisoka threw the ring into the air, and the ring immediately emitted a black mist. In the mist, Hisoka found some strange symbols.

Hisoka did not recognize these symbols, but he was sure that these symbols were the core of the formation he was looking for.

"Break the formation!" Xisuo roared, then Xisuo reached his right hand into the ring, put the ring to his mouth, and bit the ring.