Reiner learned from the books that the spell-casting process in this world is very detailed.

According to the theory of modern magic, there are three steps to unleashing magic.

The first step is to build a model, each spell has a unique model, the model is composed of nodes and magic flow pathways, the embodied spell model is the basis of the circle, this step is also to determine the type of spell, once the model is built, then unless the cast is canceled, it cannot be changed.

The second step is to mobilize the magic power, here you need to use your own magic power to light up the nodes in the spell model, and guide the magic from the outside to inject into it, the biggest difference between modern magic and ancient magic is here, in ancient magic, the magic used in the spell is completely supplied by the caster, so the magic reserves and control over the magic power are extremely high, but since Herman. Lord Braggs has developed a model of the spell, and after using external drainage to construct magic, people only need to have the magic power to light the node to release magic.

The third step is the traditional casting of magic, where the magic is formed by the spell model, and eventually interferes with reality to form various phenomena, and the caster in this step does not need to do much, only to keep the mana supply in order for the magic to work properly.

In ancient magic, what mages need to do is to temporarily construct the magic they want to cast in their minds, and the imagination is not a non-magic model, but a more specific image, such as fire, such as frost, so the mages who have achieved something in ancient times not only need amazing magic reserves and control, but also need a strong imagination, and the understanding of everything is by no means achieved overnight.

There are many reasons for the failure of spell casting, some people are unable to fully light up the node due to the lack of mana stock and control, and many more people are unable to build a spell model perfectly.

For example, the simplest of the zero-ring spells, the Ignition Technique, the universal base model of this spell has six spell nodes, and the eleven mana channels that need to be captured exactly where they are, require a fairly high level of concentration, and of course, for a trained mage, it is fairly straightforward.

Although such magic can only raise a handful of flames on the fingertips that can be easily extinguished, it also serves the purpose of interfering with reality.

The light technique is a bit simpler, so Dana, who even failed to cast the light technique, Reiner does not dare to say that she is a normal student.

What's more, the huge destructive power caused by this failed spell casting is definitely not something that ordinary people can do.

"I'm sorry, Mr. Headmaster, I'll try to make money to compensate for the damage, I didn't mean to."

Dana is like a cowardly hamster at this time, for fear that Reiner will eat him alive, the principal's deeds have not yet spread among the students, so in Dana's consciousness, Reiner is still quite scary.

"No, Mr. Groh needs to put his design talents to good use, right?"

Reiner had no intention of holding Dana responsible, and besides, he couldn't really get the student to make money to pay for it...... Wait, how do students make money?

Before his mind could deflect to some indescribable cause, Reiner remembered that this Dana. Christine is a work-study student, and she is responsible for some chores such as cleaning on weekdays.

"Hehe, although I don't know if it can be restored, but since Mr. Ian Gray gave me this opportunity, then I'll give it a try."

Groh smiled, and seeing that Reiner didn't want to question the student, he said in passing.

"So, Dana-san , I have a few experiments recently, and I may need your help, why don't you go to classroom 301 on the third floor of the teaching tower at three o'clock tomorrow afternoon?"

"Uh, can I say no?"

Dana said immediately, embarrassing Reiner.

"Can you explain why?"

"Because that's the way it is, the powerful headmaster asks the female students to come to the classroom for individual tutoring or something, and then they take the opportunity to do something indescribable......"

"Wait a minute, where the hell did you see these things?"

Reiner shook his head, what has become of the cultural industry in this world, and why does any girl have knowledge beyond common sense in this area?

"When I was cleaning, I could occasionally pick up a few novels."

It was probably Claire's lost treasure, Reiner said with a thought.

"Teacher Claire will also be with you, you can rest assured."

"What if Teacher Claire has fallen and is instructed by you to try to control me?"

"This kind of plot doesn't exist!"

Reiner was embarrassed, and he felt that he needed to read what those girl's novels were about, and no matter how you looked at them, they seemed to hide a very heavy content.

"Forget it, whatever you want, it's just Dana-san, I've been researching new magic recently, and I happened to see the invitation you sent out because of the failure to cast a spell, and if you refuse, I won't force it."

Reiner is actually preparing to take the spell test and become a Ring Mage, and for this reason, his recent focus has been on building spell models in addition to the school's repairs.

He could see at a glance that Dana's failed spell casting was a failure to build a spell model nine times out of ten, and judging from the astonishing damage caused by that failure, she was definitely not a person who lacked magic power.

Therefore, Reiner needs to test his theory, and since he happened to meet Dana, he sends out an invitation, of course, if the other party does not agree, he can also verify it himself.

"Hmm......"

Dana was a little hesitant, on the one hand, Reiner's preconceived impression made her a little worried, and on the other hand, the temptation to improve her spell casting was too great for her to make up her mind for a while.

"Go back and think about it, I'll be waiting in that classroom tomorrow."

Seeing this, Reiner was not reluctant, and waved his hand to let Dana leave.

"Mr. Ian Gray's approach to education is unique, and if my teachers had been like that, I'm afraid I would have continued on my academic path."

Gro praised, and it was not clear how sincere he was.

"Thank you for the compliment, Mr. Gro, and I would like to ask how long it will take to repair this stargazing tower at the current pace?"

"Depending on the damage, the construction period will be extended by a maximum of three days, which means that it can be completed in 10 days."

Gro thought for a moment and replied.

"It's great."

Reiner had thought it would be extended for a longer time, but it doesn't seem like the damage is too much of a problem at the moment, and he relies on the income from Coke, and now he has a sizable amount of money in his hands, which is not too difficult to rebuild the campus.

"After this Observatory, I think I'll need your help with repairing the other buildings, Mr. Groh."

"Willing to serve."