For the next two days, Levi did not rush to do any entrusted tasks, but stayed in his room and did not come out.

On the first day, he pierced the C-class gene fluid.

Changing this gene fluid, of course, is to strengthen itself. He wanted to strengthen his body as soon as possible and push the strength of his body to the level of extreme tempering.

Originally, he was looking forward to this needle being able to break through directly. But it seems that the potential of his body is indeed too poor. People with medium qualifications, who have exercised to a certain extent, have a few injections of D-level gene fluid in front of them as a foreshadowing, and then a needle of C-level gene fluid can have a great chance of breaking through the limit level. And he has used two injections of D-grade and two C-grade gene fluids, but he still hasn't been able to break through.

He felt to himself that his body had reached a bottleneck. It is estimated that one more stitch should be able to break through anyway...... Right?

The mood is a little depressed, but talent is really a thing that makes people have no way at all.

Putting this matter aside first, Levi then took out the C-rank flesh core and absorbed it completely.

The Book of Ten Thousand Laws, which had already absorbed a D-class gene liquid before, finally unsealed the fifth page.

The familiar flower-style text is presented on the original blank page, which is quite beautiful. This time, four options appear on the fifth page.

"Upgrade the Sharingan."

"Upgrade the Steel Slash."

"Gain new abilities, Dark Vision."

"Get new spells, mage armor."

……

This time it was good luck, all four options were good, but it made Levi troubled.

The annoyance of happiness.

The two upgrade options are good, and the two new abilities are also very good, and Levi wants both.

But it's a pity that a page can only have one ability.

The ability to see in darkness can be very useful in special situations, but after all, the applicability is on the low side, so he ruled it out first. After the steel slashing flash is upgraded, the power will inevitably increase, but for now, it is still enough for the time being, and the urgency of upgrading is not high.

What really bothered Levi was the upgrade options for the Mage Armor and Writing Wheel Eye. The former can provide him with good protection capabilities, and he really doesn't have any reliable defense means now, which is exactly what he lacks now, and can directly make up for one of his shortcomings. And Writing Wheel Eye is the core strength that he can currently fight with opponents at the extreme level, and without Writing Wheel Eye's insight ability, he will lose a lot of advantages.

After thinking for a moment, the good student struggled, and Levi finally chose the mage armor.

After all, even if you don't upgrade the writing wheel, the basic ability effect is still there. And after obtaining the mage armor and making up for the shortcomings of defense, his combat effectiveness will immediately have a very intuitive increase.

Watching the other three options disappear, Levi's heart was very painful.

Closing and retracting the Book of Ten Thousand Laws, Levi sat down at his desk and began to read the book "Primary Energy Bullet Engraving Technique".

This is obviously a book for newcomers to study, and it does not involve theory, nor does it go into a long story about the principles of magic pattern technology and other theoretical things. The opening chapter goes straight to the point, starting with a detailed explanation of the process of making an energy bullet and breaking down the corresponding steps.

In other words, want to make an energy bullet? Just follow the steps in the book, step by step. A smart person may be able to learn it very quickly, even if he is a fool, he can always learn it with more practice, it is just a matter of time.

Oh, and the question of money.

Levi bought a lot of materials. The most expensive of them all is the carved knife, a small knife that costs fifty aquamarines. In addition to this, there are a number of physical white crystals, as well as an energy converter.

Combined, these things were worth two amethysts, which almost burned out his deposit.

The preparation was not difficult, he quickly used the energy cable to connect the engraved knife to the energy converter, and then inserted the uniform white crystal into the energy converter.

The next step is to follow the content and design blueprint in the book, and use the engraved sharp knife full of energy to depict the energy in Baijing onto the bullet. There can be no pause in the middle, no severance, and it must be composed in one stroke.

However, on the first attempt, Levi failed. Before he even had time to engrave it, the moment the carving knife was filled with energy, he felt that it was out of control, and the energy could not be condensed on the tip of the knife.

The book explains this reason: it is a sign of the user's lack of control over energy. The user must concentrate on controlling the energy inside the knife and guiding them throughout.

Levi Cat was in the house, trying for a whole day, but still failed to gather strength.

In the middle, Judith came to see him once, and Levi remembered what she said.

"This is the lowest level of carved sharp knife, ordinary people, half an hour to an hour can master how to control energy for condensation, people who complete the ultimate tempering are even shorter, and ten minutes to learn can be regarded as slow. Levi, you can't figure it out after a whole day of research? ”

At that time, the expression on Judith's face was very puzzled. In her heart, Levi was a genius who had mastered two natural abilities, how could she not even do this?

To this, he had no choice but to be silent.

Judith also comforted him with a few words, saying that maybe Levi's talent was not in the chain of will. After all, it takes a strong enough willpower to control external forces. The high-level Demon Pattern Masters are all people who have gone far enough in the development of the Chain of Will.

But when she left, the look of deep disappointment on her face still made Levi feel very uncomfortable.

He hated it so much.

So, he didn't even sleep that night, and under the lamp, he tried again and again to use his will to control the operation of the energy in the white crystal.

Before he knew it, he had burned more than three hundred white crystals, which were all money.

Finally, at dawn, he was able to barely complete the condensation of energy.

His head was about to explode, so he fell asleep directly. On the second day, it took him another full day to practice before he reached the standard of keeping his energy condensed for ten minutes.

This is the minimum requirement to make an energy bullet, otherwise, halfway through the carving, the energy will be broken, and the previous work will be wasted.

Although he finally succeeded, Levi did not feel happy in his heart.

Compared to what others can do in ten minutes, it took him two whole days, how can he be happy?

With a heavy sigh in his heart, he put the carving knife down and placed a new white crystal in the energy converter.

When he did these things, he was a little hesitant, and he had a little idea of simply giving up.