Chapter 716 is out of the tunnel. Nie Feng was stunned by the scene in front of him.

I saw that the scene in front of me was completely different from what I had seen in the tunnel before, and perhaps the scene in front of me was already a scenery that was beyond the shackles of the common sense of this world.

A huge blue metal pillar like a 10,000-year-old tree, is slowly rotating in an extremely slow rhythm, on top of the metal pillar, there are many strange and huge runes carved on it, the pillar is not cylindrical, if you look closely, you can see some mechanical edges and corners, indicating that the cross-section of this pillar is definitely a polygon with countless sides.

On the giant pillar, it is not completely smooth, some strange potholes, etc., are not uncommon, but these potholes are obviously deliberately carved, because these pits are all in a standard hexagonal shape, as if there are some parts and other things to be inserted here, this huge dark blue metal pillar, just like the pillar that holds the heaven and earth in the myth, and seeing this mythical thing in front of him, Nie Feng's shock can be imagined.

And around the giant pillar, there are many huge metal gears, the slow rotation of these gears drives the rotation of this metal giant pillar, and in addition to the gears, there are many mechanical parts and devices that Nie Feng can't name, plus the surroundings here are covered with a kind of silver metal, under a faint blue light, this place seems completely detached from the world.

The metal columns that support the parts, gears and other things, although far less huge than the giant column in the center, but the diameter is more than one meter, these columns are high or low, long or short, standing on this strange space, forming a scene like a forest of columns, the gear parts driven by these pillars rotate fast and slow, and it is completely a sophisticated huge machine.

"Haha...... It's shocking, right? Don't you think that such a scene, such a thing is not something that the world has at all?" Seeing Nie Feng's stunned for a while, the old man let out a laugh and said, "Sue sù you kid, the old man is willing to stay in this ghost place for it, haha......"

"Old man...... This...... What the hell is this......" Looking at the huge machine in front of him, which did not belong to the human world, Nie Feng was extremely shocked and asked the old man, after all, the thing in front of him was really amazing, and that kind of scale was definitely not something that people in this world could imagine and manufacture.

"Huh...... The power of this thing is so great, you can't understand it, you know, this thing has the ability to change the world, let's go, I'll take you to the 'chain pivot', you can go back from there. Shaking his head, the old man didn't tell Nie Feng what kind of purpose this device was in front of him, but listening to the old man's words, Nie Feng knew that this device must not be simple.

Since the old man didn't want to say it, Nie Feng wouldn't ask forcibly, and the old man took Nie Feng to walk on this strange machine, because of the huge gears and other parts, for ordinary people, it was completely a piece of floating metal ground, so the two of them traveled back and forth among these parts and gears.

"Old man, what is the chain pivot you mentioned just now?" Jumping between these metal parts and gears, Nie Feng finally couldn't help the question in his heart, and asked the old man, whether it was the huge machine in front of him that was like a remnant of the flood era, or this strange scene, it made Nie Feng feel extremely puzzled at this moment.

"Haha...... It doesn't matter if you tell you, do you remember that the old man told you that this is the place under the ninety-nine chains, and this chain is the central place that connects the ninety-nine chains, and only from there can you leave this place. Touching his messy beard, the old man shook his head and said.

"Old man, I've been hearing you say this, this place seems to have been deliberately created by someone, so what is it for? Why spend so much effort to make such a place?" Finally, Nie Feng still asked the most critical core question.

Hearing Nie Feng's inquiry, the old man glanced at Nie Feng with a mysterious look, and after a while, the old man said, "After seeing this thing, don't you still understand why this is? ”

"This thing?" Looking at the huge machinery around him, Nie Feng's heart tightened violently, and he said, "Should it be...... It's just to hide it...... This machine qì, right?"

"It's kind of useful for your head. After hearing Nie Feng's words, the old man nodded and said, "That's right, this place is an isolated space created to hide this Nine Armillary Heavenly Motion Instrument, in this way, those who are interested in this place, no matter how hard they try, it will be impossible to find it, haha......"

"Little ghost, you remember it for the old man!" fiercely, the old man's expression in laughter became extremely strict, and after staring at Nie Feng deadly, the old man said in a cold voice: "If you are really lucky enough to get out of here, what you see today must be forgotten immediately! And you must never mention half a sentence to others, if you are brave enough to say this nonsense in front of others, the old man promises, you will definitely die a miserable death, and your soul will be imprisoned forever!"

"Originally, you fell here, I don't have any obligation to save you, but this time, old man, I have made an exception to give you a chance to leave, of course, it is not so easy to leave, you have to go back to the top from the lowest chain. After finishing speaking, the old man took Nie Feng and walked into a metal gate, it turned out that while talking, the two of them were almost at their destination.

After passing through the gate, Nie Feng entered a huge underground cave, the huge underground space was unusually huge, if it weren't for the rock on the top, Nie Feng would even think that he had returned to the ground.

However, the huge underground space is not the main reason why Nie Feng is shocked, what shocks Nie Feng the most is that in the center of this vast underground cavity, a huge cylindrical building is presented in front of Nie Feng's eyes, this building, it looks like it should be a cylindrical giant tower, from the outside, this giant tower only has the first and second floors, which are exposed, and the third layer has gone deep into the rock wall of the top layer.

"This is where the center of the chain pivot is, and in order to protect the chain pivot, we built this magnificent hundred-story giant tower with the chain pivot as the center, and within each layer of the giant tower, there is a piece of heaven and earth, and this abyss of Naluo is under this hundred-story huge tower, with the power of this hundred-story giant tower, suppress the power fluctuations of the heavenly motion instrument, haha......"

"Little ghost, you can never think that the hundred-story giant tower is sealed to the gap between the realms, what a spectacular innovation, with the soul chain as the connection of the seal, and the hundred-story tower as the pillar of the seal, sealing all kinds of monsters in the tower, turning its demonic energy into the tower, refining the demonic energy of heaven and earth, and relying on the chain pivot, so its name is ......"

"It's called ...... Demon Burning Demon Refining Tower......" Without waiting for the old man to finish speaking, Nie Feng called out the name of the giant tower in front of him in the old man's surprised gaze.