Just when Mu Han was depressed, suddenly there was a sound in this canyon, and it was really those strange birds that flew up. Mu Han thought about it for a moment and decided to stay away from those strange birds to see if they had a purpose or no purpose.

He hid dozens of feet away, because there was no fog to cover it, so even if it was darker, he could still see it. He waited quietly for a moment, and a strange bird flew up, followed by another, and dozens of strange birds flew up in a row, without stopping, and flew straight along the road where he came.

Worried for a moment, Mu Han followed, and decided to walk in that direction, maybe there would be gains. In this huge dark canyon in front of you, you can't see anything, so you should go back and look for it.

He hung far behind the strange birds, about a few dozen feet away. lest the strange birds find him. This walk was nearly two hours, and I rested a few times on the way, ate some dry food to replenish my body, and recovered a little, and the speed of the journey was also a lot faster. After walking for such a long time, I still haven't reached the destination where the strange bird wants to fly. The gray fog around him was getting thicker and thicker, much thicker than where he had woken up before.

In order to avoid encountering the Nightmare Beast's surprise attack again, Mu Han decided to rest for a few hours and recuperate before moving forward.

He took out the cold light barrier, although the defense power was no longer of much effect to him now, but it was more than enough to defend against ordinary nightmare beasts and those strange birds. And I can have a good rest. He doesn't have to be in this darkness all the time, staying in this gloomy space for such a long time, his heart has begun to be impetuous, and some inexplicable emotions will emerge from time to time, which is an extremely dangerous signal, so entering the cold light barrier can also put an end to those bad emotions in time.

After three hours of rest, his body has basically recovered, and his mind has recovered most of it. He retracted the cold light barrier and continued to hurry, this time much faster, chasing after a flock of strange birds, and running forward with all his might.

It was nearly an hour to rush forward like this, and if it was still above the ground, it would already be the next day.

Suddenly, I heard a noise in front of me, as if the strange birds had encountered something. Mu Han couldn't help but speed up a little faster, and in a moment he had come to the place where the strange bird stayed, and it was actually a ruin, the remains of a giant city that had been abandoned for a long time, the city walls had collapsed, and the city gate was dilapidated, as if the silent years had been so broken by the wind of time.

Although the gray fog here is thick, you can still see things within more than ten feet. Mu Han came to the city gate, where a lot of strange birds died, and some nightmare beasts, and the noise just now was actually a battle between nightmare beasts and strange birds. Mu Han swung his sword and directly killed several Nightmare Beasts that pounced, the gray mist here is so thick, maybe this is the source of the gray mist.

He walked into the ruins, walking along the road, and kept slashing the nightmare beasts that pounced, to his surprise, these nightmare beasts no longer dropped that gray crystal, it seems that it may be accidental. Along the way, he killed more and more Nightmare Beasts, and the more he went inside, the stronger the Nightmare Beasts became. From the beginning of the beginner level of martial arts, all the way to the current advanced level of martial arts. The nightmare beasts that had been slain turned into gray mist and vanished.

The city was in ruins and ashes, and the streets alone could be faintly distinguished, with potholes and gray-colored gravel all over the way.

Nightmare beasts kept appearing, and Mu Han kept slashing, and even became a little numb. After walking for almost an hour, he finally walked out of the thick gray mist, but the ground in front of him was very clean, and the neat stone bricks were laid on the ground, with slight traces of wind erosion. In front of me is a huge circular square, on which several wide stone paths lead to the huge tower in the center of the square, which is about a hundred feet high and gray in color. It is shaped like a hexagonal vertebra, and it covers an extremely wide area, about 100 zhang square.

Around the giant tower, as far as the eye could see, there were six nightmare beasts with a height of more than ten zhang, guarding there like guards, their strength was really not low, each of them was equivalent to Mu Han's strength, and they were already high-level kings. However, there are only six Nightmare Beasts here, and there should be more on the other side of the giant tower, so there should be more than a dozen Nightmare Beasts guarding here. If he wanted to enter the gray-white tower, he would need to get rid of all these Nightmares.

One, two, three are okay, not to be afraid, but it is possible to directly six or seven, or even more, then he can't bear it at all. Mu Han walked around the circular square along the edge of the gray mist, and sure enough, there were nightmare beast guards in a circle, a total of twelve. The twelve Nightmare Beasts were a little different from what they had seen before, and they actually emitted a faint cyan light, as if the breath of life had been buried in the darkness.

Mu Han came to the stone road corresponding to the gate of the gray and white giant tower, calculated the distance, and planned to use the Xinglin Shadow to enter the tower directly, not to be hostile to those nightmare beasts, otherwise once he was entangled, then he would be in great trouble. He walked forward for a distance of more than ten zhang, and those nightmare beasts also found him, and quickly rushed towards him, the distance of one hundred and ten zhang was only a matter of a moment for those giant beasts with a height of more than ten zhang.

Three rushed to the front, followed by the other three, with a deafening roar that caused two Nightmares to rush towards them. Mu Han directly teleported to avoid the first three Nightmare Beasts, and when the last two Nightmare Beasts were also dozens of feet away from the tower gate, he cast the Star Lin Shadow and directly entered the tower gate.

The moment he entered, he glanced back at the Nightmares. Although their eyes were full of ferocity and anger, he could faintly feel that they were quite afraid of the gray-white tower.

The next moment, Mu Han finally knew what they were afraid of, because when he turned around, he was also terrified when he saw the situation here. In the midst of this gray-white tower was a black dragon, a truly living black dragon. It is about 100 zhang long, winding and coiling. The entire first floor occupies most of it. There was a round well on its side, and it was from which those gray mist emerged, and a steady stream of extremely rich blue-gray mist rose upward, most of the cyan aura flew into the black dragon's body, and only a very small part of it floated upwards with the gray mist.

Mu Han looked at all this in front of him, and while he was frightened, he also cautiously took a few steps back, preparing to leave here. But as soon as he took two steps back, a thunderous voice came from his ears, "Little guy, since you're here, let's talk to the old dragon." The voice was a little lazy, but it made him feel very depressed, as if an invisible mountain was pressing down on him. It was the black dragon that spoke, it slowly raised its head and looked at Mu Han, with a hint of warm anger in its voice, "Human, how can you have the breath of our Canglong clan on your body?"

Mu Han looked at it, frightened in his heart, but he still throbbed strongly, and said steadily, "Maybe, it's because I have a friend who belongs to the Canglong clan." ”

"Oh?" the black dragon said, his voice calmed down a lot, and he asked again, "What's its name?"

"Her name is Long Ling. ”

"It turned out to be that little girl, no wonder it's a little familiar. The black dragon muttered to himself, as if he had thought of something, "Are you a member of the Mu family of the human race?"

"Exactly, I am Mu Han, a disciple of the Mu family. When Mu Han heard this, his heart relaxed a lot, and he was no longer so nervous when he spoke.

"No wonder. Saying that, the black dragon bowed down the dragon's head again, looked at Mu Han and asked, "How did you come to this lost world." ”

"I'm here to participate in the Genius Battle in the Imperial City, and we're competing in this lost world right now, and I was resting near a small puddle before, but I was accidentally forced into a puddle by those Nightmare Beasts and fell here. Mu Han said truthfully. In the face of the existence of the dragon clan with extremely terrifying strength, he did not dare to be careless at all.

"I see, but those are not Nightmaremon, but Nightmare Beasts, just very similar to Nightmares. The black dragon nodded slightly.

"I don't know if the seniors can tell the juniors how to get out of here and go back to it. Mu Han thought in his heart and asked stubbornly.

"It's not hard to get out of here, there are two options, one is that you fly back from the puddle where you fell. The second is to head to the Abyss of Darkness, where there is a ladder that leads directly to the ground, but there are countless Nightmare Beasts living there, and it is very dangerous for you. The black dragon thought for a moment and said.

"Fly, juniors can't fly, I can only take the risk of taking the road of the gray abyss. Mu Han nodded, feeling quite helpless in his heart, it seemed that it would be extremely difficult to leave here.

"yes, you're a Terran. Then you can only choose the gray abyss. The Grey Abyss is not far from here, and it will take you about an hour to walk to the right after leaving the square. ”

"Thank you seniors for telling me, the juniors won't stay longer, so I will leave. Mu Han clasped his hands into fists and said very respectfully.

The black dragon looked at me, thought about it and said, "Okay, you also have some relationship with my Canglong clan, and I won't embarrass you, you can go." ”

"Yes, thank you. With that, Mu Han hurriedly retreated, and his body was already covered in cold sweat. Mu Han glanced at the six shadow beasts that rushed towards him, and he didn't stay for a moment, and used the Xinglin Shadow Technique, and left the circular square directly, following the direction that the black dragon said, and ran out of the city.

It was another fight all the way, and there were many martial arts general-level shadow beasts, to Mu Han's surprise, when killing those general-level shadow beasts, they would drop that kind of gray crystal, but the gray crystals also had sizes, and it seemed that the higher the strength, the larger the crystals. The highest he killed was a high-level Nightmare Beast, which dropped more than two inches of gray crystals. Along the way, he went out of the city, and he also accumulated seven or eight gray crystals of different sizes in his hands, all of which were put into the void backpack.

Mu Han looked back at the barren giant city, except for those shadow beasts, that is, those strange birds flying in all directions, constantly fighting, and then dying, and then being eroded by the gray mist, gradually disappearing.

He followed the path pointed by the black dragon, and walked forward, and after about an hour, he came to a huge canyon, just like the one he had encountered before. However, above this canyon there was a rope bridge, tattered, stretching into the dark depths, and a dozen wrist-thick chains were placed on broken planks.

Mu Han stood at the head of the bridge, looking at the dilapidated rope bridge, doubting whether this rope bridge could pass people, but he could only fight in order to get out.

Thinking of this, he took a step and walked onto the rope bridge.