The light curtain had disappeared, and the scene just now made Zhu Yan feel a little uncomfortable, but soon, he was relieved, this was just a game, everything in it was artificially designed, and there was no comparison at all;

The light curtain disappeared, and on the wall next to it, a stone slab slowly rose, revealing a dark compartment in which a thick book was placed, which seemed to be in good condition;

Zhu Yan walked up, took it out of the dark grid, and examined it carefully;

This is a basic book about engineering, and the content in it is very ordinary, and it talks about some engineering principles;

This book is also an item that can be used by the player, and after using it, it can be used to learn the side business of engineering; It costs ten silver coins to learn an engineering side hustle in the main city, and this book, that is, for players who want to learn engineering, saves ten silver coins, which is not very useful;

This is just a very ordinary book, I don't know why it was put into this dark grid, Zhu Yan scratched his head and looked at it at will;

At this time, a thin bookmark fell from the book, and that bookmark also exuded a pale blue light;

Zhu Yan was curious to pick it up and take a look, a little surprised;

This turned out to be an engineering drawing, but if there was no item luster, Zhu Yan would definitely think that it was a piece of waste paper that had been scribbled at will;

The text on this bookmark was scribbled and messy, and the pattern depicted looked like a child's graffiti, which Zhu Yan carefully recognized;

“……

It's disgusting that they ignore me!

That toy castle was so ridiculous that they were still playing with it. I really don't know what that ugly toy has to play with;

I'm going to build a big guy and smash their ugly toy in one fell swoop. Yes, that's a good note!

His length should be ......, no, the torque is too much, so it will fall apart in a few strokes, there is a problem with the formula, and it has to be reversed and recalculated. That's how it should be......"

Here are some symbols and formulas that Zhu Yan can't understand, which can be seen by skipping them directly. The owner of the bookmark originally just planned to make a toy, but later became more and more serious;

Zhu Yan directly skipped those complicated formulas and incomprehensible symbols, and looked at the last sentence;

"Hey. That's what I'm supposed to play. It only takes a stone to shatter those guys' castles, and it seems that these magic patterns can also play a role, and can produce frost-like properties, which is really a surprise! ”

Such a small bookmark actually made Zhu Yan feel that he had nowhere to find his iron shoes, and it took no effort to get them;

Because this is a drawing of the making of a frost trebuchet;

Zhu Yan finished reading the words on the bookmark. A dazzling light flashed, and the bookmark in his hand. It has become a scroll-like item, and its properties are truly revealed;

Item Name: Frost Trebuchet (Drawing), Attributes: After use, you can learn to make a Frost Trebuchet (1), Requirements: Advanced Engineering;

This is the engineering drawing that players can use, however, seeing this standard drawing in his hand, Zhu Yan has a feeling of loss, he still likes the bookmark-like drawing just now;

This drawing, can only make a frost trebuchet, after it is made, it will disappear, a trebuchet is not enough, Zhu Yan is ready to continue exploring, I don't know if after clearing this copy, I can still get some more blueprints for the production of siege equipment;

The drawings of the frost trebuchet made Zhu Yan lose interest in continuing to flip through the books in his hand, Zhu Yan did not study engineering side business, and was not interested in this book, so he put half of the books into the package, this book can be given to other friends who want to learn engineering, the basic engineering textbook of ancient goblins, after learning, maybe there will be some surprises;

Zhu Yan turned around and was about to leave the library, when he suddenly heard the alarm sound from the mechanical ball, and a short red light was emitted from his big eyes, pointing in the direction of Zhu Yan's left;

Zhu Yan's heart sank, and he was ready to fight;

Green light, which indicates that there is something good, and red light, which indicates danger;

Sure enough, soon a robot-like monster slowly came out of the depths of the library;

This robot looks very similar to the real housekeeping robot, but it is not enough to be more delicate than the real housekeeping robot, and it looks no different from the real person;

Name: Library Maintainer (Elite), Level: Level 40, HP: 60000/60000

Another elite monster, like the mechanical snake he encountered at the beginning, it seems that it should be a librarian-like character;

However, it looks empty, there are no other monsters, and if you fight, you won't attract other monsters halfway;

Zhu Yan summoned all the summons and commanded them to pounce on this elite monster;

"Intruder, this is not the place you should be;" A mechanical sound came from the defender's mouth, and the two arms flipped and transformed, combining into two long, slightly curved knives;

Boom~

The Deadwood Warrior held a mace and smashed it at the defender's head, but was directly parried by the opponent's long knife wielding his right hand, this scene looks a little funny, the Deadwood Warrior is three meters tall, but the defender is about the same height as an ordinary human, or even lower, the two fight each other, and they are evenly matched;

No, the defender turned out to be a step higher, after a fight, there was a damage of more than two hundred points on the head of the deadwood warrior, and on the head of the defender, only two words parry appeared;

Swish~

The defender's body jumped violently, and he crossed the top of the deadwood warrior's head, his two arms continued to wave, and the long knife cut out brilliant sword light, constantly slashing at the deadwood warrior's body, and when the defender landed, he actually hit thirty-two consecutive blows, and the deadwood warrior's blood volume dropped by half;

As soon as he saw it, the deadwood warrior was about to be hung up, which made Zhu Yan a little dumbfounded;

Roots entangled!

The Deadwood Warrior stomped his feet, and the roots of the tree reached out of the ground and wound around the defender, and a root spread up from under its feet, just to the waist, but suddenly tilted to the side, as if slipping, and a MISS floated up from the defender's head;

Soon, however, several more thick roots wound around it, and after a few misses, one of the roots managed to wrap around the maintainer;

Zhu Yan touched a cold sweat, fortunately, this can be both a range of capabilities, otherwise it will definitely not be able to restrain this machine maintainer;

However, even if it was restrained, the winding time that had been six seconds was now shortened by more than three seconds, almost half, and there seemed to be a special material on the surface of the maintainer's body that could greatly reduce the fixing time;

Taking advantage of the fact that the defender was restrained, all the summons and Zhu Yan pounced on it together and besieged it;

However, except for Zhu Yan's Thunderbolt Claw and Immortal Cold Flame, other attacks can be almost half dodged by it, and even if it hits, it will be resisted by its super high defense;

After three seconds, the defender's HP had only dropped by seven or eight thousand points, thanks to Zhu Yan's two powerful skills that could inflict real damage;

After three seconds, the thick roots of the tree slowly shrank back, and the maintainer regained its mobility, its figure suddenly became blurred, its speed increased a lot, and it pounced towards Zhu Yan;

The two long knives in his hand, like a gust of wind, shrouded Zhu Yan in a cloud of knife light, and Zhu Yan retreated sharply;

This maintainer, not at all like a librarian, but like a swordsman, is too fast, three points faster than a mechanical snake, even if it is an ordinary attack, it can exert great power;

Zhu Yan turned into a grizzly bear, and his blood volume and defense were greatly improved, and every time the defender attacked, he could only take away Zhu Yan's blood volume by a few dozen points;

Zhu Yan was not ready to fight with it, turned around and ran towards the bookshelf, the distance between the bookshelves was very short, and fighting there could limit the speed of this maintainer;

The defender kept chasing Zhu Yan, ignoring the attack of the summoned object behind him, the flame attack and venom attack of the flame poison ivy could cause a lot of damage to it, and the defender's HP slowly decreased;

Zhu Yan threw himself into the aisle between the bookshelves, the maintainer suddenly accelerated, returned and slashed over, the aisle was very narrow, Zhu Yan waved his bear paw and struck at the maintainer;

Bang, the flesh palm and the long knife collided together, Zhu Yan only felt a tingle, a white mark appeared in the palm, and then, Zhu Yan rushed towards the defender;

With a thud, it slammed to the ground, and the maintainer lost his balance, waving his hands constantly, and the long knife slashed at the bookshelf next to it, making a metal clashing sound;

The shelves are all made of steel, and look very hard;

After the defender's long knife slashed into the bookshelf, a frightened look appeared on the metal face, his hands returned to his human appearance, and he continued to attack Zhu Yan regardless of the above, turned over and pounced towards the bookshelf he had just chopped;

I saw it leaning down, carefully stroking the tiny marks cut by the long knife just now, and looked terrified;

The maintainer's eyes glowed scarlet, and for a while, the CPU ran at an extreme speed;

After a moment, the defender stood up, his face calm as water, and threw himself at Zhu Yan with a fist;

"Intruders, damage to library items, should be punished!" The maintainer shouted in a low voice;

Zhu Yan was dumbfounded, is this okay?

Bang, the defender smashed at Zhu Yan with a punch, and a damage of more than three hundred points came out from the top of Zhu Yan's head, and its fist attack was almost the same as the damage caused by the long knife attack;

However, the speed of the maintainer with his fist has increased a lot, faster than just now, and in such a narrow place between the bookshelves, it is impossible to limit its speed, Zhu Yan only felt that his eyes were dazzled for a while, all of them were defenders, and he couldn't capture the defenders at all, let alone attack;

Bang bang bang~

Zhu Yan felt like a sandbag, being beaten back and forth, his blood volume dropped quickly, even if he turned into a black bear, there was no way to last long; (To be continued......)