The castle of the underworld, the first fortress-style building of the underworld that Zhang Bo saw.

This castle is a typical Western-style building, with four towers at four corners, and a pavilion in the center, which is much higher than the tower, and can look out over any place within a radius of ten miles. However, at this time, there were no living creatures on the tower or pavilion, not even a ghost.

The castle was shrouded in an eerie gray-white mist, and the black walls looked particularly dark under the white mist, and there was a sense of forest from a distance.

The castle as a whole is not very large, but it is unusually tall, like a high mountain stuck in the ground. In the gray sky, there were a few black clouds, and the black clouds were just above the castle, as if looking for the demon king who guarded the castle to live on it.

There are also many windows in the castle, but they are all relatively high, and the lowest window is three feet above the ground. From afar, it looks small, black hole, as if leading to a dark abyss.

"Damn human, if you go in, you'll die!" An evil ghost shouted, saw Zhang Bo enter the crack in the gate of the castle, and was so angry that he slashed at a large gray tree, and the tree immediately collapsed.

"Stupid, isn't it the same death to stay here?" Zhang Bo looked back and said with a smile.

And so he walked into the gloomy castle.

"Oh" Zhang Bo shivered as soon as he entered inside.

He had been in the underworld for some time, and he had already become accustomed to the breath of the underworld. But when he came here, he still found that the yin qi here was a thousand times stronger than outside, and he felt fear from the bottom of his heart, and his body trembled involuntarily.

The castle was pitch black, and Zhang Bo turned on his headlamp for a good view. The lights came on, and what caught his eye startled Zhang Bo.

I saw that there were corpses of various ghosts in the castle hall, one by one, all of them were disemboweled, and some of their heads were also split. This gave Zhang Bo's first impression that it was a ghost laboratory, a place where living ghosts were used for experiments.

"No wonder those evil spirits don't dare to come in, it turns out that this place is even more terrifying than the outside!" Zhang Bo wanted to quit thinking about it.

"Da Da Da" came from the sound of footsteps downstairs, and then Zhang Bo heard a slightly kind male voice say: "There is a distinguished guest coming, what a disappointment!" ”

A young man in a white coat, with eyes and beautiful short black hair, walked slowly down with a smile. He walked very slowly, staying in mid-air for a moment with each step, and then landing heavily on the steps with a "click".

"If you don't have a yellow breath, is it a powerful devil? Still, he really didn't kill a human. Zhang Bo didn't see the yellow evil aura on the top of the white coat's head, and he was also surprised in his heart.

"Hehe, it turns out that the guest is a human. I really haven't experimented on humans yet, so you might as well be my first human experiment. The young man in the big white coat said lightly, he asked Zhang Bo to be his experiment, as if he was talking about an understatement.

He gave Zhang Bo the feeling: calm, high, mysterious, and immeasurable.

Zhang Bo stared at him carefully, and then secretly asked the Celestial Master System for help, asking what kind of monster was in front of him.

"The old ghost of the super devil, the realm is probably equivalent to the realm of the human monk's tribulation. But its strength is somewhat special, and in this castle with seals, it has the combat power of an immortal. It is impossible to defeat and very dangerous, it is advisable to flee immediately. ”

This is the news that Zhang Bo got from the Heavenly Master System. After Zhang Bo got the news, without any hesitation, he ran towards the gate in reverse.

With a "clang", the door was closed, and Zhang Bo was trapped inside.

"Hehe, come in, do you still want to go? In this castle, it will be difficult for any ghosts to get out, and neither can you humans. You may not know when you first come to Hades, but my name is Mengxing. The Raptors are my eldest brother, the Tigers are my second brother, and the Lion is my third brother. All four of us brothers were born in the underworld and belong to the natural ghost clan, which is what you humans call the devil. Lord Yama can't control us, and Emperor Xudu can't help us. Besides, I'm a ghost medicine master, and I've already taken a lot of elixirs, and those ordinary charms of you humans are just a pile of waste paper to me. ”

Mengxing said this, helped his glasses, looked Zhang Bo up and down again, and then said with a smile: "You don't have mana at all, how did you get in?" It doesn't matter, just bow down and catch it, I can treat you like it. ”

Mengxing said, and with a gesture of his hand, a cage appeared out of thin air, and in the cage was a boy ghost who looked extremely weak, and he didn't look to be about ten years old.

"He's my pet now. Of course, occasionally some ghost blood will be drawn to study and research. ”

Mengxing said proudly, looking at the child ghost, as if his eyeballs were about to pop out, completely admiring a work of art.

Zhang Bo saw that the child ghost's limbs and chest had stitched marks.

"What a pervert!" Zhang Bo scolded secretly.

"Heavenly Master System, quickly lift the mana seal for me, otherwise I may die here." Zhang Bo secretly prayed to the Celestial Master System, hoping to lift the spell seal.

"There is no need to lift the mana seal, he can't hurt you at all, you have the divine blood of the Ancestral Heavenly Master flowing in your body, and you are the nemesis of the natural enemy of this evil thing."

"KAO, at this time, it's still so rigid, it's really a stupid system."

Zhang Bo secretly cursed the Heavenly Master System, but his fingers slowly put them to his mouth, ready to bite his fingers and defend the enemy with blood.

That fierce star is also an arrogant and domineering old ghost, and he didn't put Zhang Bo in his eyes at all, he only had the weak boy ghost in his eyes. At this time, he even stroked the boy's face with his hand, which frightened the boy's whole body trembling.

"This dead old ghost, in the face of the enemy, is still in the mood to appreciate the prey. It's really not an ordinary pervert, take advantage of this opportunity to slip away. Zhang Boxiang immediately bit his finger, and then a drop of blood popped out and shot at the back of the old ghost Mengxing.

With a "boom", the fierce star was knocked down by Zhang Bo's blood and slammed into the castle wall.

Zhang Bo was also secretly surprised when he saw it, but he didn't expect that after coming to the underworld, not only did his strength and speed increase, but even the power of his bloodline became much stronger. A drop of blood can actually knock down an old ghost with immortal combat power, which is really unexpected.

After Zhang Bo knocked down the fierce star, he didn't dare to stop at all, and bombarded the gate, and the gate fell in response.

"Shangxian, save me!" Zhang Bo was about to run away when he heard the pleading voice of the boy ghost in his ears.

Zhang Bo was kind-hearted, and he couldn't bear the boy ghost to suffer, so he reflexively pounced, broke the cage, and then picked him up and ran outside quickly.

"Ah...... Roar......" Seeing Zhang Bo running away, Mengxing was so angry that his lungs were about to explode, and he screamed, the cry was similar to the roar of a beast.

A huge bolt of lightning pierced the grey sky and swirled over the castle. Zhang Bo fled far away, heard the voice, looked back, and ran wildly in shock.

"Shangxian knocked down the demon star with one blow, so powerful, what else are you running?" The boy ghost was on Zhang Bo's back at this time, his body was weak, and he even had trouble speaking.

"What do you know, little kid? This is called avoiding its edge, and then frustrating its sharpness. Although Zhang Bo said this, the speed of his escape was really fast, and his movements were a little ridiculous.

"Okay, I see. However, you can't run in this direction, it is the road leading to the ghost of Black Mountain, even the golden immortals in the sky dare not enter it easily. You run to the left, and the Gongsun Ghost King is in that direction. He is the most righteous and protects us lonely souls. ”

The boy ghost saw Zhang Bo's cowardice and pointed Zhang Bo in the direction. Zhang Bo naturally wouldn't doubt what he said, because the lives of the two were related.

"Click" A dark thunderbolt fell and bombarded Zhang Bo's side.

"Damn human, you let him go. I'll let you go! Mengxing chased after him and used Yin Thunder to bombard Zhang Bo. But he didn't hit Zhang Bo, so he said such a thing to persuade Zhang Bo.

Zhang Bo is naturally not the kind of person who betrays the weak in order to protect himself. He ignored the star and rushed forward. Beside him, there were bursts of thunder, constantly bombarding Zhang Bo.

"To the right, there's a trap ahead! On the left, jumping ......" along the way, the boy ghost kept showing Zhang Bo the way, which made Zhang Bo secretly surprised. Because of your traps and stuff, he can't see at all. However, this boy ghost actually saw it clearly, and was still giving him instructions.

"It's not far away, be quick! The bad guys are chasing after you again! The boy ghost said anxiously, without his reminder, Zhang Bo also sensed the danger, and two extremely powerful auras approached quickly.

"Fourth, what's the matter with you? The Heavenly Soldiers and Heavenly Generals are patrolling hundreds of miles away, and if they find out, it will be troublesome. Quickly put away the power of the Yin Thunder. "A tall ghost man flew over, he was born on two feet and was tall.

"This is the tiger, the second brother of the fierce family. The other is called Mengshi, the third of the four brothers of the Meng's family. Both of them were very strong, and even the king of Yama was unwilling to fight them openly. ”

Male ghosts are introduced one by one.

Another ghost reminder is also very tall, the hair is even thicker, the hair is very long to cover half of the head, and the hair on the body is also very long, like a monster.

"Second brother, third brother, you came just in time, the spirit ghost was snatched away by a human being!" When Mengxing saw the two big devils, he immediately greeted them happily.

"What? Humans have come to the underworld and snatched spirits from your castle. It sounds like an unbelievable thing. ”

The tiger said incomprehensibly.

"That's the man."

"Fourth brother, don't be joking. Although that person is fast, he has no mana at all, so how can he be your opponent. The lion also said suspiciously.

"Look at his sad ghost, isn't that a ghost?"

"Is that a ghost? Why haven't I seen it for a few days, and it's getting bigger again. ”

The tiger and the lion exclaimed at the same time, and then the three devils pursued Zhang Bo together.

Zhang Bo heard the conversation of the three devils clearly, and knew that what he was carrying on his back was not an ordinary ghost, but a spirit ghost. Although he didn't know what the spirit ghost represented, it must be extraordinary, otherwise he wouldn't have made the three devils so crazy.