There is no doubt that this is a letter from Hogwarts.

Finally waiting for you.

Rhine took the envelope from the owl's beak and returned to the back room, where he sat down on a stool behind the round table.

The circular table top is divided into three sections, piled with scratch paper, and in the middle is some materials for engraving spells.

The little witch and the little witch, who were originally immersed in studying, raised their heads one after another, and their eyes stayed on the envelope in Rhine's hand.

Rhine flipped through the envelope twice, then smiled at the two students, "There is no doubt that it was sent by Hogwarts, and the sender is probably Headmaster Dumbledore." ”

The two students were immediately interested, but they did not dare to come and see without Rhein's consent.

Rhein opened the envelope, glanced at the contents, and then raised an eyebrow at the two curious students.

The next moment, on the left and right sides of Rhine, a small head poked over.

……

【Hogwarts School of Witchcraft and Wizardry】

[Headmaster: Albus Dumbledore]

[(President of the International Federation of Wizards, First Class Grand Magician of the Order of Merlin, Chief Magician of the Wizengamot)]

[Dear Mr. Embers:]

We are pleased to inform you that your application for employment has been approved, and Hogwarts School of Witchcraft and Wizardry will offer you new elective subjects, as well as dormitories and teaching space. 】

[The new semester is scheduled to start on September 1. We will be waiting for you by August 31, so please bring the new textbook templates. 】

【Principal】

[Albus Percival Wolfrick Brian Dumbledore]

According to the meaning of the letter, Rhine was not even exempted from the interview and could be hired directly.

Is Dumbledore so relieved?

Moreover, even though it is only an elective subject, if you can add a new subject, the school board will not look at it?

It seemed a little strange that everyone was eager for Rhine to take up a job at Hogwarts as soon as possible.

Although he was puzzled, Rhine finally put his mind at ease.

Going to Hogwarts is already a sure thing.

"Congratulations, Professor Embers." Hao Min was the first to read the content of the letter, and immediately congratulated Rhine.

Harry, on the other side, was also happy for Rhine.

Rhine said with a smile: "It is indeed worth rejoicing, and there is more than one happy event today." ”

"Are there any other happy events?" Hermione's eyes lit up.

"Of course, it's just not now, and we'll have to wait a little longer."

When the two little wizards heard this, they were both looking forward to it.

But seeing that Rhine didn't want to say more, they all returned to their places and continued to study.

Rhein leaned back in his chair, closed his eyes, and pretended to take a nap.

In fact, in front of him, the interface of the tech tree emerged.

[Influence: 0/3000] [Technology Points: 1]

The influence in the upper left corner, the goal is already reached before the owl sends the letter.

Once the quest is completed, the influence is reset to zero, and the number of technology points in the upper right corner is increased by 1.

Although the next impact goal is somewhat outrageous, it is not so important in the face of the new technology that is coming.

Rhine didn't do any metaphysical rituals, he couldn't wait, focusing on science and technology.

The technology point was then reset to zero, and the small sapling below also trembled.

It began to grow, seemingly a little taller, and a second leaf stretched out from the tip.

At the same time, a great deal of knowledge poured into Rhine's mind.

【Aircraft】

This time, the new technology, as the name suggests, is a magic weapon for flying.

If it is explained in this way, it seems that it is not a big deal, isn't the broomstick also used for flying?

But this flying machine is far more practical than a broomstick.

First of all, flying machines do not require the user's mana - a trait common to almost all magic weapons.

Secondly, its controller is a bracelet, which is able to connect to the human brain consciousness.

In this way, even Muggles and Squibs can control their aircraft through the bracelet.

The third point is that the shape of the aircraft in theory is a rectangular board, which will be very comfortable when flying.

The flying broom needs to be ridden with two legs between the legs, and it is conceivable that it will not be too comfortable under the crotch after a long time.

As for the aircraft, you only need to step on it with your feet, and when you fly, it is like walking, and you can even squat and fly when you feel tired.

On top of that, the aircraft has a safety lock and relies on self-circulating mana to fly.

Even if you fly upside down, you won't fall from it.

The only fly in the ointment is that it's too complicated to make, almost ten times more complicated than a magic gun.

It has a total of 128 Tech spells, and some spells require more than one spell, for a total of 256 accessories.

Fortunately, these 128 spells fully include the 42 spells needed to make a magic gun.

In other words, it is the product of adding 86 new spells to the magic gun.

In addition to the technological spell, this time the aircraft also has stricter requirements for materials.

To make the parts, you need to add the feathers of ten different flying magical beasts to the inner cores of the ten accessories.

Perhaps, owls are one of them, after all, they can deliver magical letters.

The hardness of the fitting material has also been increased, and several important parts require the use of metal, such as steel, which is not prone to rust.

After a minute of combing through the new knowledge in his mind, Rhine opened his eyes.

The two young wizards quickly turned their heads back to their studies.

Rhine took out his wand, thought about it, changed it to a magic gun, and took a new notebook in the air.

In his notebook, Rhine thought back to the textbook in his head, scribbling down a bunch of spells and their corresponding parts models in the order he understood.

Rhine then handed the notebook to Hermione, and as he got up, he instructed, "Hermione, Harry, you can use the materials left in the store to cut out the model on this." If I'm late, try to engrave them. ”

In the process of walking outside, Rhine uses magic to summon a coat and let it wear on itself.

Then he took his suitcase, pushed the door open, and walked straight to the Dark Wizard Market.

One or two kinds of flying magical beast feathers are relatively easy to find, but ten different ones may cost a lot of money.

Those rare magical beasts, feathers are not cheap.

For the sake of feathers, Rhine went around in a big circle, picking only the cheapest, buying more of each, and finally got ten kinds.

Then, he bought several large pieces of steel and put them in a suitcase with an infinite stretch spell.

By the time I got back to the Enberth Magic Shop, it was already past eight o'clock in the evening.

The non-essential parts used to craft the aircraft had been piled up on the table at this time, and Hermione and Harry were picking out the spells they were familiar with and carving them.

Finding that Rhine was back, the two little wizards put down the parts in their hands one after another, and their eyes were all focused on Rhine, with a faint hint of excitement.