The Tower in the center of Sky Mechanical City, where the three towers meet, Astarte opens a hidden door after inviting all the other residents out of the frequented place.

After the layers of anti-magic metal plates several meters thick were deformed, the lifting device parallel to the teleportation circle that Wang Yu had previously ridden on the higher floors of the tower was revealed.

Wang Yu walked in, and Astarte's voice sounded in the elevator, informing him that down here was the hub of Sky Machinery City, and the source of power of Sky Machinery City was also where he was going.

"The power core of Sky Mechanical City? It sounds like a reactor, but how well it is maintained, it must be complicated, and if it is not handled well, it will easily cause a powerful and terrifying explosion."

Wang Yu listened to Astarte's explanation, did not suppress his curiosity, and naturally asked Astarte about information about Sky Machinery City.

According to Wang Yu's understanding, the power that can lift the entire city into the sky should be strong to a certain extent, just take the standard alchemy mechanical energy core and the Iron King that Wang Yu has learned? The reactor on Bogur's chest was an exaggeration of the cost of magic crystals and various fuels.

But in fact, judging from Wang Yu's own occasional observations, very few of the materials it collected from the outer kingdoms were used to generate energy, and most of them belonged to alchemy consumables.

In Wang Yu's opinion, the technology of Sky Machinery City, which has been stagnant for many years because of the Central Council, cannot obtain enough energy from this small part of materials to support the operation of the entire Sky City.

"What you're curious about is what I was going to tell you, there are four giant energy furnaces in Sky Mechanical City, which occupy about half of the space of the city base below, and can convert various alchemy materials into power for the entire city to use."

"But in most cases, these four energy furnaces will not be filled with any alchemical materials for reaction, which can effectively avoid the kind of scenario you envisioned as a devastating explosion caused by an accidental spill of energy."

Astarte stated the news about the power source of the Sky Machinery City, and Wang Yu listened and realized that something was wrong, these four energy furnaces were not far away under normal circumstances, so how did the Sky Machinery City maintain its operation.

"Then how did the power of Sky Mechanical City come from, it can't be something like the Void Engine."

Wang Yu thought for a while and made a guess, if it was to draw energy from the void, then this would really make sense, after all, no one knew how much energy in the void could be used for use, maybe infinite?

"Void Engine? It's a great idea, but it's not true, and it's a shame that the technology you mentioned wasn't completed in the time when Sky Mechanic City was built, and the cities where the technology was locked down after that didn't have the conditions to study this result, but I think that someone will learn to take this step soon."

Astarte denied Wang Yu's conjecture with emotion, which made him even more curious about what the power source of Sky Machinery City was, and after ruling out options one after another, a bold idea appeared in Wang Yu's mind.

"So, the power source that keeps Sky Mechanical City running can't be a strange thing, right?"

Wang Yu said what he thought, and the elevator stopped working at this moment, and reached the lowest level, and the heavy door opened under the operation of the mechanical structure, revealing a rather plain-looking walkway, and at the end of the walkway was a door, which was where Wang Yu was going to go next.

"Well, you're right, did you know that there is another mech besides my creator Merlin who created me?"

"Malfurion, one of Merlin's disciples?"

Wang Yu answered Astarte's question, which was not mentioned in the alchemy books he read, but Ziggy knew about it and told him.

"It's him, and the strange thing that keeps Sky Mechanical City running is the soul he created, and it's called, Eternal Cogears."

"This strange object manifests itself in the form of a gear of an unknown material with a radius of ten meters, and when the wielder releases it, it will rotate endlessly at a constant speed, ignoring any interference from the outside world."

"With this absoluteness, we can make great use of this strange object, and whatever it is, as long as it does not break itself, it will naturally be carried by the eternal gears in motion."

"The true energy core of Sky Mechanic City is built around this strange object, and through special devices, we can draw enough energy from it to keep Sky Mechanic City running."

Astarte informed Wang Yu of the information that the real source of power in Sky Machinery City was a strange thing, and Wang Yu figured out another thing.

"So, the four energy furnaces you're talking about are actually emergency ones?"

"Yes, we still know very little about the existence of strange things and can't fully trust them, but we can't help but take advantage of them."

"If one day the Eternalgear does stop turning, then four energy furnaces will be enough to support Sky Mechanic City to find a suitable location to land."

After listening to Astarte's answer, Wang Yu nodded, the existence of Sky Machinery City is really a great creation that gathers I don't know how much knowledge crystallizes inside.

"As a mech, I'm mainly responsible for a series of things that run the city, including the Central Council, of course, and the mechsoul created by Malfurion, it's a little special, it seems to think that it's Malfurion himself."

"So...... There aren't many things to deal with with it, except for the operation of the energy core, it's the "taboo" knowledge base you want to know, and it's left to take care of it."

"The authority is still mine, and if I want to show you, it can't handle it, but if you can communicate with it well, it should save you a lot of time searching for the information you need, although it has a somewhat odd personality."

Astarte said something about another machine soul, and his tone was a little strange, and Wang Yu could hear from his tone that the other party probably didn't have any good feelings about the other machine soul.

"And I'm in?"

Wang Yu pointed to the door at the end of the aisle and asked.

"You go in, remember that the knowledge in this is only recorded and analyzed, it is not 100% correct, don't be too deeply affected by it, and my authority is not complete, so I can let you stay in it for a limited time, it should be about a day, and I will let you know when the time comes."

Waving his hand to show that he already understood, Wang Yu stepped out of the elevator, walked through the corridor, and opened the door, the power of the chariot spread out in advance, and all he captured through the wall was a mechanical structure that was so complex that it made people dizzy.

Stepping into it, Wang Yu found that the layout was very peculiar, not that there was anything wrong, but it was a little different from the overall style of the Sky Machinery City he had seen.

If Sky Mechanic City is the kind of machine with a touch of modernity, this room is back to the stereotypical wizard's cabin.

Wooden desks and stools, rows of bookshelves, neatly stacked codex with parchment scrolls and magical pages, even the lights are old-fashioned magic crystal lamps, and some other utensils are similar......

"It's similar to how I knew the world when I first came to this world......

Wang Yu muttered to himself in his heart, didn't pay any more attention to the situation here, and instead leaned down and began to rummage through the bookcase for the information he needed.

"What are you digging through here, fiddling with other people's bookshelves without permission is extremely bad behavior in the eyes of the Mentor, I suggest you stop quickly, or I'll kick you out."

Wang Yu's hand rummaging through the information paused, and turned his head to look at the place where the voice came from, it was a woman who appeared in the form of a magic projection, she looked a little old, about thirty or forty years old, her appearance was not outstanding, and she seemed to be extremely dissatisfied with Wang Yu's behavior.

"Hmm...... I've got permission, and Astarte has allowed me to come in and look up the information."

Stuffing a book that he had just taken out of the bookshelf back into the shelf, "Analysis of the Structure of the Five Special Seventh-Order Magics" sounded quite incredible knowledge, but it was not what he needed the most, if he read the information that Wang Yu wanted, he would record a copy and give it to Avia Zieg and they brought it.

"Astarte, Mentor Tron

The soul of the machine? What qualifications does it have to let others into my own library, I am Malfurion, a disciple of the inverted guru, and these things are my own research results, why should I show them to others.

Not satisfied with Wang Yu's answer, the self-proclaimed Malfurion's ghost projection spoke to himself with an ugly face.

"You're an alchemist, aren't you?"

After thinking about it, Wang Yu pulled out a spell book called "Singularity" from the bookshelf and asked Malfurion, judging from the other books next to this book, the spell recorded in this book is likely to be an eighth-order spell.

"yes."

"And how do you have a spell book on your shelf?"

"What's wrong with me being a mage practitioner in addition to alchemy?"

"No problem, then you can read this book for me."

"Studying ,............"

Wang Yu didn't care about the ghost projection that fell silent after taking the book, and began to rummage through the bookshelves by himself, Astarte had said that Malfurion would say two words to him at most, and there was no way to stop him from looking for something.

As for what the other party said about being a mage and an alchemist, there is nothing wrong with Wang Yu's opinion, isn't Avia, but Malfurion's person is recorded in history, it is a very pure alchemist, it is indeed a mage, but in terms of the strength of the official mage, it is pure dreaming to analyze the eighth-order spell or something.

Wang Yu, who had no one to bother, quickly rummaged through the bookshelves, calculated the time, and it wouldn't take too long to go through all the bookshelves, hoping that there was what he wanted, about space, about the starry sky, and about the existence of abyssal creatures.

"Okay, I'll admit I can't decipher the spell, but that's not a reason for you to rummage through my bookshelf, what the hell are you looking for?"

Malfurion, who had been pausing for a long time, began to speak again at this time, but there was a hint of helplessness in his arrogant words.

"I want to know where the creatures of the abyss came from, and how such a weak thing made the five clans fight like that back then, and even the gods fell several places."

Wang Yu replied casually.

"You don't know this, the abyssal creatures naturally come from the starry sky, as for such a weak existence in your mouth, it was not like this at that time, the abyssal creatures you can see now are existences that have deteriorated countless times."

Malfurion was surprised by Wang Yu's ignorance.

Wang Yu stopped rummaging through his hand again, and realized that the knowledge he could get here was not limited to the codex on the shelves, but also the things that the self-proclaimed Malfurion's mech had recorded in his soul were also something he could try to obtain.

"Interested in talking?"