Lena originally thought that the explosive technique was just a little bigger fireball, but he didn't expect that the explosive technique released in his hand had the destructive power to destroy a hill.

Even if this is the lake of Lena's heart, the power of the magic will be a little biased, but it's too far away.

The only thing that can be compared with it is about the eternal blazing sun of Lanchester engraved in the gold cup of hornheim. But it is a four ring spell, and it seems to be similar to this explosive fire spell only in terms of power.

Do you really have the potential to become a bomb force?

"Wait a minute..."

Lena suddenly realized a problem.

Previously, he thought that the utilization rate of magic for magic was quite low, and the fireball improved by Lena himself, because of the use of Hydra, an element with high burning efficiency, had much higher destructive power than the standard magic.

But now, after using the Hydra element as the basis, the destructive power of the second ring spell explosive fire has been improved by more than a little bit. Although this phenomenon seems to have nothing to explore, Lena has noticed something strange.

"Can we say that compared with the first ring magic, the second ring magic not only expands some abilities, but also improves the efficiency of magic use?"

It's easy to understand. Assuming that Reiner uses fireball once and consumes one unit of magic, he will also need to consume more units of magic if he wants to use more powerful explosive at the same utilization rate.

But in fact, whether it's fireball or explosive, Lena consumes one unit of magic.

In other words, explosive fire has a higher conversion rate for magic.

From this, we can infer that in the same kind of magic, the efficiency of the Third Ring Magic should be higher than that of the second ring magic, and the Fourth Ring Magic should also be more efficient than the third ring magic.

"Originally, I thought the so-called number of rings was just an indicator to distinguish power, but now it seems that the number of rings of a spell is actually an indicator to distinguish efficiency!"

This is the content that most of the magic books will not mention. It involves the definition of magic and other basic issues. It is also of little help to pragmatism mages.

"No wonder some seemingly simple spells have three links and four links, while some powerful spells have only two links."

Lena has some understanding that this is not an exploration of the world, but it can also help him to better learn and improve magic in the future.

"Just because of this, higher efficiency requires stronger computing power and control ability. When a low-level mage forcibly uses a high-level spell, it will not only lead to physical weakness due to magic overdraft, but also the burden brought about by frequent use of the brain."

Because he was in his own heart lake, Lena didn't care about expression and used his familiar way.

"If you use a computer to describe it, magic is an application program. High level magic is a more efficient program, while low level magic is a more primitive, simple and inefficient program. Using magic beyond the level will hurt the soul. In fact, in a sense, it is a kind of jam or even crash caused by forcibly opening a large program under the condition of insufficient configuration!"

Such a transformation, he felt suddenly enlightened.

"If you think so, the utilization rate of magic power of those nine ring spells is quite high."

Lena recalled the high-level mage he saw in Ernest. He was able to easily cast a large range of magic. In addition to the high-level mage's abundant magic, the magic he mastered was more efficient.

"Wait a minute, so is the suppression of high rank mages to low rank mages also..."

the suppression of low rank mages will make it almost impossible for low rank mages to mobilize external magic to cast their spells. In the past, Lena has always imagined it as a pattern of two whirlpools, one big and one small. Now, he can add some assumptions on it.

"Will magic always flow spontaneously towards more efficient ways to use it?"

On earth, Lena knows that there is a theory that light will always find the shortest path to move. If magic is a similar substance in this world, it seems that it is not unacceptable to flow into more efficient magic.

"You can look up the relevant books later."

As for magic, Lena has no reference on earth, and there are not many books about the nature of magic, so his conjecture may have been put forward by other mages, or even proved. If it is true, he will get rid of a doubt.

After confirming the new explosive magic model in the heart lake, Lena suddenly felt that it was possible that his three ring magic would become a stronger fireball magic, and eventually he would travel all over the world with one fireball magic.

"There is no problem that can't be solved by one fireball. If there is, can we have another one?"

In silence, Lena, who has completed today's task, pulls his consciousness back to reality from the lake of heart.

Hot and dry summer night is still uncomfortable, the open window blowing a few with the summer wind, so that the parchment of Lena desktop trembles slightly.

Everything seems to have never changed, but at this time, what Leiner engraved in the heart lake is the second ring magic explosive fire. From a practical point of view, he can be called the second ring mage.You know, it's only a week since he became a ring mage. Even if you think about it, it's only two months when he engraved a ring of magic into the heart lake.

In two months, the promotion from the first ring to the second ring is very fast.

Now, as long as Lena goes to the local magic association to register and make a simple assessment, he can become an official second ring mage.

It's just that he's not going to do it.

It's not that he wants to deliberately suppress the speed of his own advancement to cover up anything. With so much feedback from the world, it's reasonable for Lena to advance quickly, and it won't cause any doubt.

Lena is simply lazy.

If you want to register for advancement, you have to go to torun one more time. It's just a title. After becoming a higher-level mage, you will inevitably encounter more business troubles. Lena doesn't want these.

He felt that he simply saved, and when he was promoted to the middle level, he would go to the examination, which not only saved time, but also avoided many troubles in the middle. I believe members of the magic association can understand it.

So decided, Lena put away the papers on the desk, suddenly felt like something was missing today.

After thinking for a moment, he suddenly realized.

Today, the tiger cat didn't come to check!

Before, no matter when writing a paper or inscribing a spell, the cat would suddenly appear, as if touring its territory, but today, it's gone.

"Oversleeping, or something else?"

He got up and looked out of the window.

Soon, he saw that under a tree downstairs, fina was feeding the familiar kitten with dried meat, and caressing the kitten's head carefully for fear of scaring each other.

"Here it is."

Sure enough, compared with myself, is still a lovely girl more worthy of being close to?

With no reason to think about it, Lena smiles. He doesn't disturb them. He sits back in his chair and glances at the calendar on the wall.

It's half the month of Bailu, and it's only a few days before alimia's birthday.

The third generation of peas will mature tomorrow.

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