"What is this thing?" Wang Yu pointed to the book that Avia took out in surprise, although he could understand what this thing corresponded to, but he couldn't help but want to ask.

"Well, it's the spell-casting book in "Legendary Mage" that Wang Yu told me, and the purpose of my design of this book is to let Wang Yu and you also have the ability to cast spells flexibly."

"I had this idea before, but I was able to make this test after I had the teacher's laboratory."

As she spoke, the girl opened the heavy book-like magic channel, which looked like a book magic device, but when opened, it was more like a small box.

The interior is a space made of metal, which still looks very rough, and the metal adhesive parts inside have obvious patches and welding marks, and the grooves are distributed in it, most of which are empty, and only two grooves have something like a card inserted inside.

"Wang Yu, the chip concept you told me gave me a lot of inspiration, most of the current magic guides are one-time charging products, and they need to enter a long-term state of stagnation after use, such as the fireball ring I designed before, which needs to be charged after each use."

"Yes, this is also a common problem of many magic guides now, and only things with core energy supply such as magic arrays can keep running for a long time."

"But, Wang Yu, you think that a small ring can be embedded in the magic circuit to cast spells, so why can't the content be integrated into a page like the chip you said, as long as the magic power is imported, it can stimulate magic like the magic circuit in the ring."

Avia folded the book and placed it in front of Wang Yu.

"Indeed, but the design of the ring itself also contains the special materials and structure inside, compared to the book page, which is difficult to form a three-dimensional magic circuit structure, although the ring is small in size, it can form a three-dimensional magic structure."

"This three-dimensional structure can bear the load of the magic flow very well, so that the magic circuit will not be destroyed due to the stimulation of magic, if you use it once, you have to scrap a magic channel, it seems too extravagant... No, isn't this a magic scroll? ”

Although Wang Yu's own alchemy skills are not good, his theoretical knowledge is not weak, and he can understand the girl's idea, but if you think about it carefully, isn't this a magic scroll, one-time excitation, one-time use, very easy to use, and very... Burn money.

Could it be that the function of this book is that one page is a magic scroll? When Wang Yu was fighting, tearing one out of his hand was a spell? Although he carefully imagined this scene and found that it would indeed greatly improve his combat effectiveness, the practicality was too poor, and he really couldn't afford to burn this money.

"No, Wang Yu, we should change our thinking, if we say that it will collapse if we use it once, we can ignore this collapsed circuit, but create a new circuit, we don't have to dwell on the circuit that inspires magic and disintegrates!"

"What?" Wang Yu was a little dizzy.

"We can use the magic circuit to cast a magic circuit, and each time it collapses, it will only destroy the projected circuit, and the body of the projection circuit is still intact, as long as this process is repeated, we can achieve the effect of using a spell continuously."

"Hmm... Really! Wang Yu slapped his thigh, sometimes his thinking was really limited, and Avia's mention simply opened the door to a new world.

Since the magic array will collapse once it is used, then I use a magic array that will not disintegrate to project other magic arrays, and the projected magic array will collapse once I project it again!

"Genius!" Wang Yu patted his head, the girl's idea can be said to have created a new direction for a magic guide! Wang Yu couldn't help but be excited!

Wang Yu picked up the girl who was too petite compared to him from the bed and spun around in the air a few times, causing the girl to scream again and again.

"It's you, it's too strong!" Wang Yu put the flushed Avia back on the bed, and looked excitedly at the book that still looked very rough.

Maybe someone has come up with this way of casting spells before the girl, but the girl is the one who really made the prototype of this item, and this talent is just borrowing the teacher's laboratory for a day, too... Amazing.

Thinking of something, Wang Yu asked Avia, who had not recovered from Wang Yu's sudden circle. "What about your teacher? Didn't he say anything about this? Your teacher shouldn't be blind to the advanced nature of this thing. ”

The girl recovered from the impact just now, and after thinking about it, she answered Wang Yu's question.

"The teacher's words are actually not the same as my research direction, he is more in biology, in the words of Wang Yu's hometown, my direction is more inclined to physics, and the teacher is more inclined to chemistry and biology, and there is a certain difference between the research directions of our two."

"So?" Wang Yu scratched his chin, he really hadn't thought about this, he didn't expect that Avia's teacher was actually different from Avia's research direction, could it be that Avia's way to get recognition was only by virtue of talent, and moreover, all self-taught? Hiss...

"Well, the teacher has been in the laboratory recently, but he came out that day and gave me a score in the way of knowledge points, practical operations and creative assessments, and then he was satisfied with opening his collection of books and spare laboratories to me."

"Let me guess, perfect marks?"

"Hmm!" The girl nodded proudly and shyly.

"Strong!" Wang Yu gave a thumbs up and did not hesitate to praise himself.

"Okay, okay, I'm embarrassed, let's try this prototype, I haven't officially used it yet!" Avia stood up and pushed Wang Yu, motioning for him to go to the courtyard outside.

Wang Yu nodded, although the injury this time was not light, but compared to the previous ones, it is really nothing, plus a bunch of cruel medicines, it will be fine to rest and rest, and there will definitely be no problem with going out to test.

Taking the magic guide book, Wang Yu walked into the courtyard, Avia entered the courtyard one step earlier, took the magic guide book in Wang Yu's hand, and opened the back flap, which was still slightly rough, to reveal the internal structure.

"Well, this is the core of energy supply, and then this is the formation used for projection, the effect is to link your spiritual power, as long as you touch this formation with spiritual power, he will use the high-purity magic crystal of the core to supply energy, and use the mixed spell of the earth element and fire element to construct a one-time magic circuit.

"Because it's a one-time circle that doesn't pursue quality, it can be done with a structure that is not complicated! After that, there is the second energy supply structure, which transfers the second layer of energy supply of the magic crystal to the formed formation to trigger the spell! ”

Avia explained the internal structure to Wang Yu simply, although Wang Yu is not the developer of this magic guide, but it is very likely that he will be a user for a long time after that, and it is very necessary to have an understanding of the equipment he wants to use.

The overall theory is not complicated, but in order to realize this seemingly uncomplicated theory, a huge amount of computation and exquisite craftsmanship are difficult problems to be solved.

"And then there is this, the special "page" used to carry the cast circle, I refer to the card slot design you mentioned Wang Yu, this kind of card-like page, in fact, the internal magic structure is the corresponding semi-finished circle. ”

Therefore, the core magic array does not need to construct a complete magic structure, it only needs to be completed, and the energy and time consumed are greatly reduced, and the "page" can be inserted into the corresponding slot according to the needs to release spells! ”

Avia pulled out the two items in the slots with the contents inserted, and it was indeed a metal card-like object that looked about the size of a smartphone, just as she had said.

On the "page", there is a dense look at Wang Yu's numb scalp exposed magic array, which looks very complicated, and it should indeed be an initial test that has not been optimized, so the bare structure is easy to damage the internal structure.

"At present, I have only completed the relatively simple two basic one-ring spells, the Fireball Technique and the Wind Blade Technique, the Fireball Technique is an ordinary spell, but I have optimized the magic circle of the Wind Blade Technique, Wang Yu, you should like it!" Avia inserted the two "pages" into their respective positions.

"Try it!" After adjusting the magic guide she made, Avia handed it to Wang Yu.

"Good!" Wang Yu took the book, looked at it and found that it was very intimate to set up a buckle on the back, which could be easily pinned to the waist.

Hanging this book on his waist, his spiritual power poked out, and he sensed the core formation of the book, and with the stimulation of Wang Yu's spiritual power, the slightly rough but sophisticated parts of this magic guide also began to operate interlockingly.

The core magic circle absorbs the magic power provided by the high-purity magic crystal, and casts a spell with a combination of earth and fire elements, which is like a lithography machine that instantly completes the semi-finished magic circuit of the "page", and completes the magic guidance circuit.

A complete castable magic circle was constructed after a delay of about 0.5 seconds, and then the magic guide circuit of the other interface was also powered by the magic crystal, which transmitted the magic power to the "page" where the circle was constructed.

In about 0.75 seconds, the elements converged, and the scorching heat gradually surged in Wang Yu's palm, and a fireball that was not too big, or even smaller than an ordinary mage, floated on Wang Yu's palm.

Looking at this fireball, Wang Yu felt shocked, he can actually use spells, use witchcraft to distort reality, create magic virtually, and then forcibly cast spells through spiritual power guidance.

But with his Void Energy Reserves, it was pointless to even use a one-ring fireball technique that was only about half of its power once.

At this moment, he himself did not consume a little bit of magic power or void energy, but only used a small amount of spiritual power to hook the core of the magic array, and after a delay of 0.75 seconds, he released a fireball technique that only slightly decreased in power.

And you must know that this kind of spell does not need to be chanted, does not need to consume mana, and the delay of 0.75 seconds is equivalent to an instant for the level of a mage apprentice, which is too strong, this is an invention that spans the era, Wang Yu has no doubts.

What's even more terrifying is that this thing can cast spells continuously...

"Whoosh, boom!" The fireball was thrown out by Wang Yu and smashed on a stone in the courtyard, the ring of fireball technique was not very powerful, and after exploding a large piece of fire, it only pushed the stone slightly and blew off a small corner.

But then "whoosh, whoosh, whoosh...!" Nothing stopped, Wang Yu began to throw fireballs from his left and right hands alternately at intervals of about a second, and as they continued to explode, the stones were destroyed and worn out little by little, and finally turned into a pile of debris under the impact of a fireball.

"I'll go..."Wang Yu was a little surprised, to this extent, although the power can't be said to be very great, but it has reached the point where it is useful in actual combat, if someone flies him later, then he will let that guy see the horror of the serial fireball throwing.

"Try your hand at Wind Blade!" Avia looked at Wang Yu's shocked expression and urged Wang Yu to quickly try the Wind Blade Technique, which she thought Wang Yu would be satisfied with.

"Good!" Wang Yu nodded, and the command of the spiritual power to the book changed, from the stimulation of the "page" of the fireball technique to the wind blade technique.

The air flow surged, and the surrounding gas was compressed by the magic power and converged in front of Wang Yu's palm, and the gas of different densities caused the light to be refracted, and an obvious half-moon-shaped air curved blade appeared in Wang Yu's hand.

Wang Yu aimed at the branch of the tree by the window of his room, the wind blade, launch!

"Huh?!" However, the expected scene of the wind blade flying out did not appear, and with a piercing sound of breaking the air, the condensed wind blade was not launched, but turned sharply in front of Wang Yu's hand, and then dissipated.

Wang Yu was stunned for a moment, then looked at his hands, and then looked at the smiling girl next to him, and a feeling of surprise came to his heart, this is a special spell, the same as the girl's bursting fireball, this is melee specialization wind blade.

Wang Yu calmed down, his spiritual power hooked the main magic circle, and pointed into a knife, Wang Yu waved his arm while stimulating the book, and the wind blade that was not fired instead simplified the magic circle, which made the wind blade activate more quickly.

There was almost no delay, and every time Wang Yu's palm was swung, a wind blade would appear in front of him and tear the air, bringing a goosebump-making howl.

Swinging continuously, the wind blade is intertwined into a net in front of Wang Yu's palm, and every time the palm is swung out at great speed, it is a fatal cutting blow, the more continuous use, the more Wang Yu feels handy, and a sentence comes to mind in his heart, "The invisible blade is the most deadly!" ”

"Click, click!" Wang Yu stepped to the courtyard wall, his palm waved in a chain, and the wind blade followed closely behind, and the overlapping invisible blades were constructed, and the wind blade collided with the relatively strong brick wall, carving scars, and the stone powder fell, and disappeared by the wind blade.

"Click, click! Boom! Wang Yu was excitedly continuing to experiment with the wind blade of melee combat, and suddenly, he felt a strange fluctuation of magic power, his complexion changed, and the ripples with the void energy rushed to his waist at great speed, Witchcraft Barrier!

Then there was a dazzling fire and an explosion that occurred together, the book exploded, and the grizzled Wang Yu walked out of the smoke and dust, nothing serious, but the barrier did not block all the power, and a large piece of clothing was blown off his waist, and there were some sparks.

"Wang Yu!" The girl hurriedly ran over and was relieved to see that Wang Yu was safe and sound.

"I'm sorry..."The girl lowered her head in frustration, but she didn't expect that her satisfactory work almost hurt Wang Yu.

"Great!" She was greeted by a big hug from Wang Yu, and he lifted Avia up again.

"This magic guide is so powerful, this is a cross-era work, remember the Edison I said? What kind of failure are you, the whole laboratory of the people themselves burned and finally succeeded, you will definitely succeed! ”

Avia looked at Wang Yu's smiling eyes in a daze, narrowed her eyes, and also showed a bright smile.

"Hmm!"