Half a month passed in the blink of an eye.

Now that Liu Mu's strength has reached the four-star source person, in addition to cultivating the source power, he has also cultivated a secret technique.

This secret technique was one of the gifts that Yanagi included in the Source Ring to Yanagi at that time, and Yanagi had only learned it in the past few days.

In one room, Yanagi is sitting on a straw mat on the ground, his eyes closed.

"It's done!"

Liu Mu's eyes quickly opened, and his heart was extremely surprised.

Just now, Liu Mu was modifying and upgrading the Light Shield Source Technique. If it was known to outsiders at this time, that person would definitely think that Liu Mu was crazy!

In fact, you can't blame others for thinking so, after all, learning the Source Technique is already a difficult thing, not to mention using the Source Technique to transform and upgrade! I'm afraid that many people have never heard of it, and they will naturally think that it is just crazy words.

Immediately after that, Liu Mu immediately took out a small pile of materials for the production of the Light Shield Seal from the Source Ring and placed it in front of him, and then continued to close his eyes.

Liu Mu began to slowly guide the power of the divine soul in the divine soul, wrapped those materials, and then used his divine sense to slowly guide the source power in these materials into a bamboo seal according to a deep pattern.

With the passage of time, there are more and more lines on the bamboo seal, and finally a complete light pattern with a shimmer of light is formed, and the light pattern flows slowly, faintly emitting a trace of amazing source power fluctuations.

"It's done!"

Liu Mu opened his eyes, stretched out his hand and grabbed the bamboo seal, and his divine sense sensed the object in his hand slightly, and then he let out an excited voice.

"What really happened?"

Liu Yiwei, who was sewing clothes with needlework and thread next to her, was a little puzzled when she saw this. After all, in the past few days, Liu Mu has been pouring magic marks in the room like this, and he hasn't seen the same reaction as just now.

"Ivy, look!"

With that, Liu Mu quickly urged the magic seal in his hand, and the next moment, a one-zhang high source power light shield appeared in front of Liu Mu, exuding a very strong source power fluctuation!

Seeing this, Yiwei also opened her mouth widely, because she knew very well that the light shield activated by the normal light shield spell was only half a zhang high, and the source power fluctuation was far less strong than this, and she was even more surprised how Liu Mu made it.

"How did you get this?!"

"I don't know what's going on, when I was refining the magic seal in the past few days, I vaguely felt that there was something missing in that light shield source technique, and when I followed that feeling and observed it carefully, a very clear transformation idea began to emerge in my mind, and I didn't think much about modifying it with the mentality of trying it out, but I didn't expect it to be really transformed and upgraded!"

Liu Mu calmed down his excitement and scratched his head.

"Are you a genius or a devil?"

Liu Yiwei put down the needle and thread in her hand, held her chin with her slender hand, cast a look at the former, and smiled.

"Am I so likely to be the devil?"

When Liu Mu heard this, this half-exaggerated and half-damaged words made him a little confused.

"Because you're doing what monsters can do!"

“......”

For the next few days, Liu Mu was immersed in refining this new type of light shield seal.

......

Bailei Town, a three-storey majestic tower stands in it, which is also unique and conspicuous in the entire Bailei Town.

The entrance of the majestic high-rise building is full of people, in and out, and it is obviously a popular place.

Above the gate on the first floor of the majestic high-rise building, there is a huge gold-lettered plaque, and the five majestic gold-lettered characters on the plaque come into view.

"Blood Thunder Mercenary!"

"What are you doing here?" Liu Yiwei said with some confusion when she saw Liu Mu stop in front of the door of the majestic high-rise building.

"Let's go, something's up!"

Liu Mu said that, and took Liu Yiwei into the majestic high-rise building.

The Blood Thunder Mercenary Office, as the name suggests, is a trading place that provides business for mercenaries, and is named the Blood Thunder Mercenary Station because most of its mercenaries are mixed in the Blood Thunder Mountains.

Mercenaries are also a profession, and there are quite a lot of them, and their income mainly comes from the commission of the tasks completed by the mercenaries.

In this world, all walks of life need a lot of natural treasures or powerful guards, and these people often go to the mercenary station to register and issue their tasks and pay the corresponding commissions in order to get those things or strong protection.

Mercenaries, on the other hand, can go to the mercenary shop to receive mercenary tasks suitable for themselves or their teams, but they need to pay the corresponding fee first, and then receive the corresponding commission after the task is completed.

In addition to the commission mission business, the mercenary office also provides the commonly used art printing transaction business. The reason why it is commonly used is because these commonly used spell seals are relatively low grade and are in high demand, while those more advanced spell seals are generally put up for auction house bidding.

Mercenaries have been in dangerous places for many years, so they naturally need a lot of self-defense and attack methods, and the magic seal is one of the hottest ones.

And because of its price, practicality, and easy to carry, it is loved by these mercenaries who often lick blood on the knife edge.

On the first floor of the Blood Thunder Mercenary Station, the spacious hall was crowded with people at this time.

Willow entered the door and looked around slightly, then walked in a direction.

At a front desk in the hall, at this time, a tall and beautiful woman in a purple robe was quickly sorting out the information, looking a little busy.

"Sister, where is the Seal Trading Office?" A slightly immature voice suddenly sounded not far in front of the tall woman.

Hearing this, the tall woman slowly stopped what she was doing, looked up in the direction where the voice was, and then two slightly immature and smiling cute faces came into view, and instantly felt like a fresh breeze.

"Little brother and little sister, what's the matter with you?" the tall and beautiful woman hurriedly laughed softly.

"I'd like to go to the Seal Dealer and sell some Seals!" replied the young man.

When the tall and beautiful woman heard this, she was slightly surprised, but she didn't think much about it, thinking that this young girl was running errands for others, and then said, "You two should be here for the first time, my sister will take you up." ”

After that, the tall and beautiful woman walked out of the front desk, and then beckoned to Liu Mu and the two to follow.

The tall and beautiful woman named An Tong is a senior deacon of the Blood Thunder Mercenary Institute, originally she was only in charge of the management of simple chronicles, but due to the recent shortage of staff in the mercenary office, she was temporarily sent to the front desk to help.

In the past few days, she has been tired, but fortunately, when she met two young boys and girls with lovely faces at this time, her complicated and depressed heart was cleared.

This is also the reason why An Tong personally led the way for young boys and girls.

Liu Mu and Liu Yiwei followed An Tong to the second floor, and the hall on the second floor was still spacious and bright, but now there were many people and it was slightly crowded.

Two women and a man shuttled all the way through the shadows, and a lot of eyes were projected around, but more of them were on An Tong and Liu Yiwei.

After a while, the three of them came to a slightly less crowded front desk.

"Sister An, is there something wrong with Sister An?"

A young woman at the front desk saw An Tong and immediately said respectfully.

"This little brother said that he wants to sell the magic seal, you can help him handle it. Hearing this, An Tong looked sideways at the young boy and girl next to him, and then ordered.

When the woman at the front desk heard this, she was surprised in her heart, thinking that these two were the daughters of which family, and she actually asked Sister An to bend down to guide the way, but when she saw that the two of them were dressed plainly, she didn't continue to think about it, and only thought that it was some distant relatives of Sister An.

"Okay!" replied the woman at the front desk, then motioned for the boy to step forward.

"What's your name?" asked the woman at the front desk softly.

"Willow. Willow replied.

"What grade of magic seals are you going to sell, and how many are they?" The woman at the front desk had already picked up the brush and was ready to start writing it down in a book.

"First-class high-grade magic seals, light shield magic seals!20 pieces!" Liu Mu said.

"Shhh

The woman at the front desk gasped slightly, thinking to herself that the young man in front of her was afraid that he was not teasing her, this light escape magic seal was obviously a first-class medium magic seal, where did it come from? If it weren't for An Tong standing next to her, she would have ordered the guards to drive him out.

An Tong was also stunned at this time, a little surprised, could it be that the little brother said the wrong thing?

Then, An Tong said softly to Liu Mu: "Brother Liu Mu, you are not wrong with this level of high-grade magic seal?"

An Tong obviously thought that the little brother was very important, but he was mistaken.

"Well, sister, that's right! First-class Superior Skill Seal, Light Shield Skill Seal!"