At night.

The lingering charm of summer has not yet dissipated. At night, crescent college is still a little hot. It will be at least a week before the atmosphere of autumn will completely occupy the whole continent and bring down the temperature.

Lena opens the window. He sees that downstairs, fina is feeding the kitten. They are happy. Lena smiles and says nothing.

He sat back in his chair and looked at the parchment on the table.

Up here, it's a magic model.

even if as like as two peas of magic books, no match model can be found on the whole parchment. The complexity of the model is far beyond that of the ordinary low level magic, enough to meet the standard of the three rings.

After studying several four ring arrays, Lena found a wonderful thing.

That is the so-called medium level magic, whose magic model is only changed into three-dimensional.

No matter how complicated the low-level magic is, all the magic nodes and magic channels are on the same plane, which can be included with two simple axes. Even the three ring magic, whose magic nodes and magic channels are constantly changing, is no exception.

However, the magic nodes and magic channels of the four ring magic are also fixed. As long as we can correctly understand the geometric relationship in the three-dimensional space, the four ring magic is actually even simpler than the three ring magic.

If you can engrave the four ring magic in the heart lake, you will have the capital to promote to the middle level. But for the mages, how can the breakthrough from plane to three-dimensional be so simple? Although it seems that there is only one more coordinate axis, the calculation changes brought by it are far from so simple.

With this understanding, it is a relief for Lena.

With his computing power, it's not easy to deal with the four ring magic. If the four ring magic requires other aspects, then Lena may have some worries. He didn't expect that the four ring magic tested the spatial computing power of mages, which is what Lena is best at.

However, before inscribing the four ring spell, he still needs to bring the three ring spell into the heart lake.

This is a spell designed by him according to his own situation. It has a very special nature. Although he dare not say that there will be no one after him, there is no similar one in the history of magic at least.

Reiner confirmed the parameters of the spell model again before he closed his eyes.

About 15 minutes later, he returned to reality from the world of Xinhu. When he opened his eyes again, Lena knew that this three ring magic had been engraved in his Xinhu.

To tell you the truth, he didn't want to use this spell at will. On the one hand, it was one of his means to protect his life, and he couldn't show it to others easily. On the other hand, this spell was very destructive. Unless the enemy had a clear threat to himself, Lena would still have room for it.

After the three ring spell is engraved, Lena is actually enough for the three ring mage. As long as he is stable for a period of time, he can immediately attack the four rings.

In a short period of six months, I'm afraid few people can believe that I was promoted from a master apprentice to a medium level master.

But Lena's situation is extremely special. He has found major breakthroughs one after another. He has received world feedback of top quality and quantity. The feedback brings abundant magic reserves, which is enough for Lena to break through to a higher level. Rather, it took him half a year to be promoted to the fourth ring. In the view of some high-level mages, it's too slow.

The improvement of magic power does not rely solely on the improvement of world feedback, but more on the familiarity with magic, the control and application of magic. It takes a certain amount of time to accumulate, and it is not that the faster you advance, the better.

Feedback from the world can greatly speed up the process, but it can't make an apprentice advance to a higher level overnight.

Apart from Lena, in the history of modern magic, only Sir isaris Alberton has been promoted much faster than usual. It took him five years to go from a ring mage to a high-level mage, and it took another five years for a high-level mage to a legendary mage.

This promotion speed is unique even in the whole history of magic, not to mention the era in which Alberton lived. Many theories have been put forward, and new sources of world feedback have not yet been found. However, starting from movement and force, he has abruptly opened up a new field.

But even if the legend like Alberton, its promotion speed is not as fast as Lena.

Even if we don't consider the feedback from the world that Reiner's research may get in the future, his accumulation now is enough for Reiner to surpass the speed of Alberton's promotion. According to the current speed, at most three years, Reiner can try to cross the middle level and enter the threshold of high-level mage.

And Lena is so eager to improve his strength, a large part of the reason is that he decided to join the magic team of Erasmus.

He made such a decision after some consideration.

First of all, Lena himself is very curious about the hemiplane. He has never been to any hemiplane. Naturally, he yearns for this unique environment and wants to experience it on the spot. But most of the hemiplanes are dangerous. Even if they are marked as safe, they may encounter unexpected situations. Now there are so many middle-level mages in the team, which is enough to make the accident possible The sex is reduced to the minimum.Secondly, Erasmus has unique and rich animal and plant resources, which is helpful to the research of Lena. Just like going to North First, Lena is also ready to collect some special magical creatures for cultivation if he has the opportunity.

Finally, Lena was also curious about the Potsdam Baptist.

As he noticed, Potsdam Baptist's father was the one who wrote where are the magical creatures? 》It's Oscar Baptist.

All his life, he tried to find out the law of species evolution, but failed to do so. He left only his works on the ecological investigation of each hemiplane. It seems that his son Potsdam inherited his father's will and made a new interpretation of species evolution.

It is not a comprehensive evolutionary theory, because it emphasizes the role of subjective initiative too much. But this is a magical world. Philosophically speaking, magic is the product of idealism. Although many materialist theories are still common in the world he is in contact with, he is afraid to draw conclusions without authorization and needs to be serious investigate.

In the next period of time, the school has nothing to focus on. He can do some of his own things. It seems a good choice to join the magic expedition.

As for the letter that he could take a student with him, Lena didn't intend to waste the opportunity. He already had a candidate in his mind.

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