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To create new and amazing magic tools, abundant imagination and planning skills are essential.
But.
What's even more important is building a solid foundation.
That's why Professor Baron's classes usually proceed like this:
He teaches a class to build the foundation, and then the students create a magic tool related to the content of the class.
Students who perfectly create the basic magic tool can freely conceive and create magic tools during the remaining class time.
"Done."
Davian was the first to raise his hand.
It's only natural.
This was Davian's third time taking the magic tool class.
He can now make a magic tool that turns on a light when you press a switch with his eyes closed.
"You've already finished it?"
Professor Baron Tools approached.
"Perfect. Well done. It wasn't for nothing that everyone keeps talking about Davian."
"Thank you."
"There's still a lot of class time left. Use your imagination and try to create a new magic tool."
"Yes, Professor."
In the third iteration, he invented a calling card using a scroll.
He was so frustrated by the lack of a mobile phone that he made something to replace it.
He used it very usefully this time.
Thanks to that, he was able to participate in the Dungeon Core Amplification.
He also made an oven that could adjust the temperature from 50 to 1,000 degrees Celsius into a small box and gifted it to the head chef of the student cafeteria.
He also made a bicycle where stepping on the pedal a few times would activate the mana stone and transfer power to the wheels.
He tried to spread it around the academy as a shared bicycle, but the production cost was too high and it was cancelled.
'Only some professors of magical studies with weak stamina liked to ride it.'
It was made to improve the mobility of wizards, but it was used as a means of commuting for some professors.
This year, he's thinking of making a more important magic tool.
A magic tool that would turn the kingdom upside down.
A magic tool that could overturn the current state of affairs on the continent.
'Shall we make it properly this time?'
In fact, the prototype has already been completed.
He also checked if it worked properly through Sarah's legs.
However, if Dilan Nadeon had been there, he could have tested it on one more person.
He was exposed as a spy and taken to the capital, so he couldn't test it.
He took out the materials he had brought from his bag.
A long, hollow wooden box.
The length and thickness are about the size of Davian's forearm.
Click.
When he opened the wooden box, there were places prepared to place the circuits and mana stones as he had made them in advance.
In the center of the box, he made a circular space for the three-pole magnet to rotate.
He hollowed out the center of a three-pole magnet of an appropriate size and connected it to a short iron rod that was plugged into the center of the circular space.
Next to it, he made a thin iron plate protrude so that it would keep touching the three-pole magnet when it rotated.
"What are you making?"
Professor Baron, who had come over, asked.
"It's a device that artificially draws out the mana or internal energy that a person has."
"Artificially draw out mana?"
"Yes. A device that can draw out mana or internal energy from the heart or dantian."
Baron carefully examined Davian's wooden box.
"It looks like you're going to react the mana in the heart with the mana stone and artificially move it."
As expected of a magic tool professor.
He can figure out the operating principle just by looking at the circuit configuration.
"Yes."
"But this device can only move a speck of mana?"
"That's enough."
Baron looked at Davian with an interesting expression.
"The principle is amazing, but what can you do with this?"
An astonishing word popped out of Davian's mouth.
"You can detect spies from the Marino Empire."
"What? Detect spies?"
Davian was still carefully setting up the circuit in the wooden box as he answered.
"They have the same tattoo on a specific part of their body. You can't see it normally."
"I heard about that."
"If you use this, you can force the mana or internal energy to move and reveal the tattoo. It's enough to be able to artificially move even a speck of mana."
It's an invention that even the royal family, who are so troubled by the spies of the Marino Empire, hadn't thought of.
"But how do you know where the tattoo is? You can't take off the clothes of everyone who passes by and check if the tattoo comes out or not."
"They have to show each other and check, so they wouldn't have tattooed it too deep inside the body."
Professor Baron pointed to the center of the magic tool that was being completed, the three-pole magnet.
"Can I ask what role this three-pole magnet plays?"
"The tattoo is made by mixing special dye with mana stone powder. When the tattoo is revealed, a faint aura of a specific mana stone will inevitably come out."
Professor Baron slammed Davian's desk with his palm.
"This three-pole magnet sensed that aura and made it rotate!"
"Yes."
Davian flicked the three-pole magnet with his finger and made it spin.
Ddiriring.
The three corners of the three-pole magnet collided with the thin iron plate in succession, and an alarm sound rang.
"It also makes a sound like this."
"If it actually works, it would be an amazing invention."
He's already confirmed that it works.
Of course, it would be more certain if there were a few more samples.
"If you attach an amplifier and make it into a door frame shape, you can detect spies just by making them pass through."
Professor Baron nodded.
It's an amazing invention.
But.
It's questionable whether it will actually work.
He understood the operating principle of forcibly drawing out the mana from the heart and circulating it through the body following that wooden box, but.
As always, whether an invention actually works properly is another matter.
He will probably encounter numerous trials and errors.
'Still, it's amazing.'
Only a sophomore in the academy.
He's just started taking the magic tool class.
To think of making a detector with such a complex principle.
Even if it doesn't work properly right now, it seems possible enough if he goes through several improvements and continues research.
He's so eager to take Davian to the lab after class and complete this detector together that he wants to play the role of a supervising professor.
Baron Tools, who is said to be among the top five in the continent in magic tool production.
His heart began to beat strongly.
'Amazing. Davian Naone. Maybe a spy detection detector will be completed at the hands of our academy student.'
At that time.
"I'm done!"
Karin Obelia shouted loudly and raised her hand.
Baron, who was trying hard to keep a calm expression, tapped Davian on the shoulder.
"Try to make it well. Davian Naone."
"Yes."
Baron, who went to Karin, looked at the magic tool that turned on the light when the switch was pressed.
It was made cleanly and perfectly.
If Davian hadn't been there, it would have been a record-breaking speed.
Karin Obelia's expression, looking proud.
"Well done."
"Thank you!"
Karin turns her head proudly and looks at Latia Meridiem, who is sitting next to her.
Following Karin's gaze, he saw that Latia was almost finished as well.
But.
The magic tool that turns on the light when you press the switch, as seen by Professor Baron.
No matter who makes it in how long, it has already become too trivial.
Already in Professor Baron's head, the imagination of presenting Davian to the king unfolded.
'Our Elton Academy student made it! He is my disciple!'
While Professor Baron was spreading his imagination.
A few students, including Liber, finished making magic tools in addition.
Before he knew it, it was time for the first class in magic tool making to end.
"Okay, then that's it for today's class. Students who couldn't finish it during class time should finish it and bring it to the next class."
At that time.
"Professor."
"Davian? What's wrong?"
"I finished making this, can I test it?"
It was because Professor Baron knew the operation method by looking at the shape of the wooden box and the circuits that Davian had laid out, but in fact, it was not an ordinary complex magic tool.
But he's already finished it?
He was going to call him to the laboratory after class and play the role of a supervising professor in earnest.
"You've already finished it? You've combined all those complex circuits?"
"Yes."
Professor Baron chuckled.
He is a genius, but.
Still a sophomore in the academy.
He is still a child.
He understands the desire to show off, but where is he going to test that now?
Where are there spies here?
But he's so admirable, he should be praised.
"Well done. Whether it works well or not, bring it to my lab and let's take a look together."
"I want to test it now."
Was he a student who liked to show off to that extent?
Just when he was starting to think that he was being a bit unreasonable.
Davian came out, organized the magic tools, and approached an assistant who was cleaning up.
The startled assistant turned around, waving her long hair.
"Wh-what? You!"
"Assistant, just a moment."
"Why, why are you doing this?"
"I want to test this."
"Why are you coming to me like this?"
"I want to see if it works or not. Can you turn around here? I need to put this on your chest."
"Ch-chest? Are you crazy?"
The assistant grabbed her upper body with both arms and glared at Davian.
"Ah, because I need to draw mana starting from the heart."
"P-professor! Are you just going to watch him do this? How dare you to the assistant! ......Huh? Huh?"
The arms that were grabbing her upper body slowly loosened.
It was telekinesis magic.
"Don't let go of this? You crazy......!"
"Why are you doing this when I'm just trying to test a newly made magic tool?"
"G-get away!"
Davian brought the long wooden box to the assistant's heart.
Woong.
The wooden box vibrated finely.
Latia, who had a high sensitivity to mana, involuntarily exclaimed.
"Oh."
This was because she felt the magic tool Davian made drawing mana from the assistant's heart.
The amount was very small, but.
It definitely succeeded in drawing out mana.
Davian's magic tool slowly scanned the assistant's left arm, starting from near her heart.
It looked like he was scanning with a metal detector at the airport.
In fact, he was inspired by airport metal detectors.
The magic tool still has no reaction.
This time, he slowly started scanning his right arm.
Ddiriring.
The three-pole magnet rotated and a loud alarm sounded.
Davian calmly turned his head and looked at Professor Baron Tools.
"No way......!"
Professor Baron ran over and roughly rolled up the assistant's sleeve.
"Th-this is......"
A clear tattoo was floating on the assistant's arm.
Thud.
The assistant knelt down on the spot.
"I'm doomed......"
Davian's informal speech skills exploded.
"Belisa Dana. Magic tool assistant. Spy of the Marino Empire. Right?"
"N-no!"
"You're denying it when all the evidence is out."
"What evidence! You made something like a toy from somewhere! Do you think I'm just going to let today's work go?"
"Then what's that tattoo?"
"Th-this is......"
In fact, he already knew that assistant Belisa Dana was a spy.
She was the one who installed listening devices in the student dormitories one by one to monitor the students in the 3rd iteration of the 5th grade.
She had never performed a proper mission yet, so she was able to escape the academy's large-scale spy detection.
But she couldn't escape Davian's eyes.
Davian turned his head and looked at Professor Baron.
"It seems to work well?"
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