It was pitch black outside the library window, and Green sat under a bookshelf, flipping through a book. A small ball of shimmer floating overhead illuminated a small area around Green.

After a while, Green closed the book in his hand, looked down at the title, and thought for a moment: "Not this. ”

Green stood up and walked towards the library door.

At the door of the library, there was a mountain of books, and the librarian did not go home, but lay down in the mountain of books to sleep.

"Where's the book, where is the material for the 'Netherel Core'?" Green stood in front of the book mountain and asked the elf lying in the book mountain.

The elf opened his eyes blankly and looked at Green: "Oh! You're the craziest magician I've ever met! Don't you even have to sleep? ”

"I'm not sleepy. If you want, I've got a pick-me-up here, and I can lend it to you. ”

"Nope! No! Thank you! I just want to get a good night's sleep right now! The elf looked at Green like he was looking at a madman.

"yes, okay." Greene paused, "Where's the information on the 'Netherel Core'?" ”

"Hah......" the elf sighed, smashed his mouth, and stretched out his hand, "On the seventh shelf, row twenty-one." ”

Greene: "Thank you. ”

"Oh! ~ If you really want to thank me, please don't disturb my sleep. ”

"Hmm...... If I find what I'm looking for, I'm not going to bother you. ”

"Oh! Damn it! The elf was furious, "What are you looking for?"

"I told you, I want to know how to build the floating city, and I want to know how to make the floating island move."

"Isn't that book in your hand good?" The elf gestured to the book in Green's hand.

"You mean the Gravity Ring Maintenance Manual?" Green waved the book in his hand, "This book is very helpful to me, but it only talks about the structure of the gravity ring and how to maintain it, and there are no construction drawings." ”

"Construction drawings?" The elf looked at Green with the eyes of a madman, "You don't really want to build a floating city, do you?" ”

"If you don't give it a try, how do you know you can't?"

“…… All right. The elf sighed and got up from the ground, "You come with me." ”

The elves carry Green through the library. After passing through the long hallway of books, the elf made his way to the innermost part of the library and opened the innermost door with the key.

Behind the door was a small room surrounded by bookshelves with books wrapped in demonic bandages.

Green: "Here?" ”

"This is the Magic Library, a small library dedicated to storing magic books."

Hearing the librarian's words, Green's eyes lit up: "Why didn't you bring me this kind of good place earlier?" ”

"Keeping the magic book is a hassle, I don't want to add to my workload!" The elf said in a natural tone, "And reading a magic book requires a lot of mental and magical power, and ordinary people can't read it for long." ”

The elf walked in, glanced around, and removed a book from a shelf. Unwrapping the bandage that wrapped the book, the elf handed it to Green.

"There are no drawings for the construction of the gravity ring, but there are some materials for the 'Netherel Core'."

"Well, thank you." Green took the book.

It is a new-looking magic book, and you can feel the magic flowing through the book just by holding it in your hand.

"Crafting the 'Netherel Core' requires the Eleven Rings spell." The elf's eyes were full of malice, "I hope your spiritual power can withstand it." ”

Green smiled slightly: "I am still very confident in my mental strength. ”

"Let's go, let's get out." The librarian took Green and walked out.

Looking at the closed small room, Green's eyes were full of reluctance.

"What books are in there?"

The librarian glanced at Green blankly: "When you finish reading this magic book in your hand, I can bring you the book list." ”

Green raised his eyebrows: "A word is a certainty!" ”

A hint of malice appeared on the elf's face: "A word is a certainty." ”

Magic is a "spiritual" force. When a mage tries to understand the contents of a magic book, he analyzes, simulates and deduces the knowledge in his mind, and this process is very similar to the process of "casting spells". Therefore, the more advanced the spell, the more difficult it is to learn, and if the spirit and magic are not up to standard, there is no way to learn it at all - if you are not careful, it will be the end of the magic backlash!

"Netherel Core" is an eleven-ring spell, a legendary spell! The difficulty of its analysis does not need to be explained at all.

Green could more or less guess the little ninety-nine in the elf's heart, but Green didn't care. Because although Green's "Demon King" is very watery, after all, he has a legendary title and has a strong resistance to the power of the law, so even if he can't learn this spell, he shouldn't be counterattacked.

In the corner of the library, Green held the magic book and began to read.

The librarian did not go back to sleep in his "mountain of books", but stood not far away, observing Green, waiting for him to lie down due to the magic backlash.

Green slowly flipped through the magic book in his hand......

The floating island is made of a special ore called "floating stone". There is a special connection between the "floating rock" and the earth, which can defy gravity and float in the air, and it will not fall from the sky because there are too many people and too heavy on the island, nor will it float away because the "wind is too strong", even if it is equipped with sails, propellers or even thrusters.

Angosari's floating islands are obviously movable, and the key lies in the "gravitational ring" that surrounds the entire island.

The gravity ring cuts off the connection between the island and the ground, so that the "connection" object of the floating island changes from the earth to the gravity ring, and then the floating island gains the possibility of moving.

If you want to describe it, the floating island was originally a large tree closely connected to the earth, and it is obviously impossible to push the big tree away with a "thruster" - then doing so will only destroy the big tree. The correct way to do this is to use an excavator to dig up the tree with the roots and soil, and then transport the tree to another place. The gravity ring is the excavator, and the "Netherel core" is the core of the entire gravity ring!

The Netherriel Core is not only the control center of the Gravity Ring, but also provides "unlimited" power to the Gravity Ring. To put it simply, the core of Netherel is not only a "computer", but also a perpetual motion machine that completely violates the laws of physics! And the heart of a high-level demon is one of the materials needed to craft the core of Netheriel.

Time passed slowly, and the only sound in the library was the sound of Green turning the pages.

The eyes of the elves, who were watching the excitement on the sidelines, slowly froze.

"What's going on? Why hasn't he fainted yet? The elf had a strange expression, "He can't be completely incomprehensible, right?" ”

No matter how advanced a magic book is, if you can't understand it at all, it's just a bunch of magic words. The words on a spellbook can only be considered a spell when the reader is trying to memorize and understand it. Therefore, if Green "does not understand at all" the content of the book, it will naturally be difficult to be counterattacked.

An hour later, Green calmly closed the magic book in his hand.

The elf stared at Green with a strange expression: "How do you feel?" ”

"I don't understand it at all!" Green's face was blank, "I have the feeling that elementary school students are reading high math textbooks. ”

"Hah......" the corners of the elf's mouth twitched, "I know." ”

Green quietly glanced at the system interface. Although Green didn't understand the book, he had quietly completed the transcription of the entire book, so it didn't matter if he couldn't read it now.

Green: "I've finished reading this book, what other books are in the magic library?" ”

"Huh? You've finished reading it? ”

"Of course." Green looked at the elf in front of him with great interest, "My spirit is still strong enough for me to keep watching." ”

The elf's eyes widened, "Wait, did you really read this book just now?" You're not staring at the pages in a daze, are you? If you really read a book, you can't be in such a good spirit! ”

What about the good reading of magic books that consumes a lot of mental and magical energy?

Green thought for a moment: "The cost of reading this book is indeed quite large, but I still have a refreshing potion here......"

"Fucking pick-me-ups! You just didn't drink the pick-me-up at all! ”

"Please don't worry about the details. Give me the list, I'd like to see what other good books are in the library. Green said that although he couldn't read the contents of the book, he could copy them down and take them away!