Levi, who has completed the extreme tempering, the next goal is, of course, to open the genetic lock.

Choosing 'Heart of Steel' means that he has basically determined his goal of unlocking the genetic lock - the chain of power and the chain of hubs.

It's just that the process is too difficult.

Since completing the extreme tempering, Levi has almost pierced three injections of C-grade gene liquid on his body, and the improvement is there, but it seems that he is still far from opening the gene lock.

Putting away his impatience, Levi warned himself that this was a process of accumulation, and he couldn't be in a hurry.

Now, with the bottleneck of the new page unsealed, and the breakthrough of the genetic lock is far away, Levi feels that he should find some other means to improve his combat power.

The new engraved bullet seems to be a viable solution.

Redeeming from the guild's reward list is indeed very expensive. However, there is not only one way to get a new design blueprint.

For example, Cai Yutong.

In the hands of this woman who is good at using firearms and even hand cannons, there must be quite a lot of blueprints.

She will definitely develop towards the chain of will in the future, and it is estimated that the path she will take will be dominated by thermal weapons. Not to mention the means of grenades and hand cannons, there are already five types of engraved bullets that Levi has seen and used in her.

Low-level bullets such as secondary puncture bullets are all conventional ammunition in Cai Yutong's hands. For example, piercing bullets with better penetration, blast bullets with small explosion effects, ice crystal bullets that can freeze enemy movement with the power of frost, and impact bullets with powerful stopping effects, she is used in battle.

Of these five bullets, except for the secondary puncture bullet, the other four Levi were very greedy.

And that's not even counting other types of engraved bullets that might have been kept as her backhand.

If you can learn the blueprint of the engraved bullet from her, it should be a good thing.

It's just that Levi felt a little embarrassed to open his mouth. A blueprint is in the guild's reward list, and the price of redemption is so high, Li Wei opened his mouth to ask Cai Yutong for it?

Too cheeky.

And if he is willing to pay some price in exchange, Levi doesn't know what he should take in exchange.

After thinking about it, he had an idea.

He came to the door of Cai Yutong's room.

This girl is a native of Clover, her family lives in the Clover community, but her parents work outside the home all year round, usually only come back once a month or two, plus she is President Mars's apprentice, so she simply lives in the guild for a long time, and usually rarely comes home.

A moment later, Cai Yutong opened the door. She looked at Levi standing outside the door, looking a little surprised. She really didn't expect that Levi would actually come to find her.

"What's the matter?"

Levi felt a little embarrassed in his heart, but his face didn't show it in the slightest. He smiled and said, "I hope to learn from you how to make engraved bullets." ”

"Do you want to exchange ideas?"

"Well, most of all, I want to learn some new ways to make engraved bullets. Don't worry, though, I'm not the kind of person who is insatiable, and within a month, I'll exchange a blueprint for an engraved bullet design that you don't have, and teach you, do you think this kind of exchange is okay? ”

After finishing speaking, Levi looked at the girl in front of him with some apprehension. This is the best solution he can come up with, if Cai Yutong is unwilling, he really can't find any other way now.

"Okay, no problem." Cai Yutong agreed very happily, she said: "Originally, we hunters should communicate more with each other, and my impact bomb was exchanged with others for the blueprint I obtained myself." ”

"Thank you."

Cai Yutong nodded, she turned sideways, let go of the door, made an inviting gesture, and said, "Then come in." ”

Cai Yutong's residence is still very similar to Li Wei's in terms of layout, but as soon as he walked into the room, it was obvious that there was a feeling of a girl's boudoir.

Cai Yutong, who has lived here for a long time, has obviously carefully dressed up his room.

Before Li Wei came to visit, Cai Yutong should have been preparing a drink. The two didn't immediately start talking about the design blueprint of the engraved bullet, and Li Wei watched Cai Yutong make coffee next to him.

A moment later, two cups of hot coffee came out.

Taking the coffee handed by Cai Yutong, Li Wei took a sip and praised: "The craftsmanship is really good." ”

Cai Yutong squinted his eyes and smiled, "Thank you for the compliment." What blueprint would you like to change to? Speaking of which, I can't teach you the ice crystal bomb, this was originally taught to me by my mentor, and it is not suitable for exchanging it with others. ”

"It's okay, I understand." After answering that, Levi began to think.

The ice crystal bullet is indeed the engraved bullet he wants the most, but everyone has said so, and there is no other way.

The puncture projectile was excluded in the first place. This engraved bullet is an upgraded version of the secondary puncture bullet that Levi mastered, although the effect has been greatly improved, but Levi's need for this is actually not so urgent, especially since he still has the special skill of [Lethal Shot] in his hands.

So, he needs to make a choice between blasters and impact bombs.

In the end, he opted for impact bombs.

The main effect of the blaster is still in the lethality, and Levi is actually not lacking in lethality now. Comparatively speaking, impact projectiles can hinder the enemy's movement and even expel the enemy, and in some cases can be more effective.

"Shock bombs, huh? A good choice, I believe that this bullet can play a very powerful role in the hands of Mr. Levi. Cai Yutong complimented, and began to rummage through the cabinet under her workbench.

After a moment, she took out a booklet, handed it to Levi, and said, "The blueprint is here, you can take it." ”

This is the blueprint for the design of the impact bomb, which looks a little thicker than the secondary puncture bullet that Levi obtained at the beginning, which also shows that the impact bomb is indeed more difficult and cumbersome to make.

After taking the design book, Li Wei thanked him, and then said, "I have a reluctant request." ”

"What?"

"If you have time, can you demonstrate the process?"

"Okay!" Cai Yutong said, "Hehe, I can also enjoy the feeling of being someone else's teacher." ”

Levi also laughed: "This won't be too much of a waste of your time, right?" ”

Cai Yutong smiled like a flower, and said with a very excited expression: "No, no, don't worry, then let's start!" ”

She sat down at her workbench and pulled out her own set of tools.

The tools she has are similar to Levi's, but in terms of quality and the value of the tools themselves, there is a huge difference. The same is an energy converter, the same is a magic pattern carving knife, the same is an energy line, and the things used by people are at least a hundred times more expensive than Levi's.