While it's true that making magical girls chant EXPLOSION is Reiner's personal taste, it's not false that this spell is used to exercise Dana's casting control.

According to the test, Dana's own mana reserves are indeed more than 50% higher than those of her peers, which means that when she casts magic, she needs to spend a lot more energy than ordinary people to control her mana flow, if it is not handled well, coupled with the unstable construction of the spell model, then it is easy to lead to the failure of the spell.

Normally a cast failure is nothing more than a reality interference failure, and has no effect, but a failed Dana cast will cause an explosion.

The reason for this is that Reiner believes that the primordial magic lost control in the process of transforming halfway, which turned into a torrent of energy.

From Dana's body, Reiner felt a trace of magic unusual, because even a simple zero-ring spell light spell can cause such a serious explosion in the event of a failure, which means that the magic used in this spell actually contains extremely high energy, but the light technique does not reflect it, it is just as insignificant as lighting a candle.

Reiner guessed that the magic itself contained extremely high energy, but the transformation efficiency was extremely low.

This was not the first thing he discovered, in fact, the High Council had already discovered the problem. Lord Braggs discovered that casting spells in the form of spell models could increase the use of magic power, and that modern magic was created.

However, no one can use magic perfectly, and even the most concise and concise spell models can use less than a thousandth of the magic power, and in Reiner's words, they are indeed squandering this energy.

But Reiner's current level is too low, and he can't access the relevant knowledge, so he can only press the table and wait for the mystery to be solved later.

With the goal in mind, the reconstruction of the stargazing tower is nearing completion, and it won't be long before astrology classes can reopen, but teachers are a problem.

The four teachers at the moment, except Claire as the mascot, are the rest of Susan, who teaches alchemy and necromancy and is also the school doctor. Michelle, Helena of the Elements and Laws. Hawkins, and Sally of Change and Illusion. Beattrick.

Obviously, not to mention the mechanical department, the teacher of the astrology system is temporarily vacant.

In fact, even in other subjects, the part-time teachers are not strong enough to take care of the teaching of the two subjects, and for the course that the teacher is not a full-time researcher, most of them are simply popular science teaching, which is difficult to meet the needs of magic assessment.

"I can't think of worrying about the rate of admission to higher education anywhere."

Reiner shrugged helplessly, he looked at the design in front of him, which he had drawn in his spare time, and had been busy for some time, and was finally able to put it on the agenda.

That's two outfits.

One of the tops is a common dress suit for men's aristocratic dresses, navy blue color, beige sweater vest and white shirt inside, the lower body is a plain skirt and black leather shoes, the skirt is just above the knee, and a pair of black stockings to keep warm, this kind of men's clothing from the ancient magic period has long been out of fashion, but it is the first time it has been used in women's clothing.

The second set is much lighter, the top is a light short sleeve, on the chest, the aqua blue scarf hangs down, the collar of the dress is very special, leaving a large piece behind him, quite like the sailor uniform of the Kingdom Navy, the lower body is also a short skirt, the same color as the scarf, just touching the knees, white socks only to the calf, with small leather shoes, it looks quite youthful.

Both outfits have the school emblem of Crescent College painted on their chests, a round of crescent moons, and it is clear that this is the school uniform designed by Reiner.

There is no concept of a school uniform in this world, as the vast majority of students in magic schools wear heavy mage robes, even at a girls' school like Crescent Academy.

But Reiner also saw that for the students, it was fine to wear in the winter, and in the heat of the summer, it was clear that such a robe was not suitable.

Therefore, he wanted to design this school uniform so that students could learn better, not for his own selfish desires.

Yes, that's it!

Reiner is quite good at painting, and combined with his own memories, he has finally restored the common suit skirts and sailor suits on the earth.

Sure enough, girls still have to wear short skirts!

Putting away his distractions, Reiner quickly took the blueprints and found Dana, who was studying on her own in the classroom.

After explaining her intentions, Dana frowned.

"Wait, I've just taught myself a little bit of tailoring, and at most it's just like this to mend clothes."

She lifted her sleeve, and there were obvious traces of stitching on it, but the stitches fell so well that they would not normally be found without careful comparison.

Reiner had noticed this when he was instructing Dana in magic, so he inquired with Claire and learned about it.

"So make costumes or something, Mr. Principal, you might as well ask for another master."

Dana is really not modest, she doesn't understand, how can she, an ordinary student, make such a complex costume?

However, she was quite interested in the clothes on Reiner's blueprints, after all, girls still like beautiful little dresses, and the mage robes are really a little difficult for these adolescent girls in this hot summer.

"Claire told me that you do tailor and make clothes in private."

It's not that Reiner really can't find someone to turn the design into actual clothes, on the one hand, he wants to refer to the aesthetics of girls at this age, and at the same time, he hopes that Dana will optimize the design from the perspective of production, and on the other hand, he also wants to cultivate Dana's talent in this area, maybe he will be able to use it in the future.

"In this way, you don't have to do the test papers every Sunday in the future, how about giving you a day off?"

Faced with Dana, who resigned, Reiner made a killer move.

"This ......"

Dana wanted to nod her head and agree to sign the contract immediately, but after a moment of hesitation, she felt that she couldn't be so spineless.

"Saturday and Sunday are closed on Saturdays and Sundays."

"Deal!"

Without thinking, Dana stood up, grabbed Reiner's blueprints, and began to examine them.

What could be happier than not having to write a math paper on Sunday?

That's two days of no homework on the weekend!

To be able to take a breather from the oppression of mathematics, even if it is to get Dana to do something indescribable, it is no problem at all!

She looked at the blueprints, then picked up the quill.

"It's better to have rounded corners here, but the colors here aren't quite right......"

Looking at Dana, who was focused on revising the design draft, Reiner couldn't help but smile at the success of the plan.