I can gather experience beads

In order to develop the Lingyin jade pendant as soon as possible.

Cao Rui rushed into the refining room and began to meditate on the formation.

In this way, more than 0 days later, with the engraving of a 0th-level [Sound Transmission] on the metal plate, the experience beads engraved with the th-level magic array in Cao Rui's mind were finally filled with experience values.

The dark black experience bead has turned into a purple bead that sparkles with purple light.

Cao Rui clicked the experience bead with his mind: "Break it for me!!"

The purple experience points in the experience beads turned into a torrent and poured into Cao Rui's mind and limbs.

After a moment, Cao Rui opened his eyes and absorbed the memories in his mind. Cao Rui had already mastered all the basic ninety-nine and eighty-one level 0 magic array runes.

The level of the 0th-order magic array engraving also broke through to the perfect realm.

Looking at the entire world of immortal cultivation, there are only a handful of equipment refiners who can master all eighty-one 0-level magic arrays in the world.

In many places, some level 0 magic arrays have even been lost.

But Cao Rui relied on the experience beads to restore all eighty-one basic magic array runes.

"The next step is to refine the Lingyin Jade Pendant by myself."

"Then let's see if we can engrave both [Sound Transmission] and [Image Transmission] on the small Lingyin jade pendant at the same time."

Cao Rui, who had just made a breakthrough, was full of energy and vitality. He took out the refining furnace and started refining equipment.

Cao Rui and Wu Qingxuan had discussed the materials of the Lingyin Jade Pendant many times before, and finally came up with a suitable plan.

This was Cao Rui’s first official refining.

According to the plan, Cao Rui took out some jade powder, spiritual pattern crystal powder and other auxiliary materials.

After putting them into the refining furnace, Cao Rui concentrated his magic power and began to slowly liquefy and fuse them together.

Cao Rui's basic weapon refining skills have been perfected, and the fusion process went smoothly.

Then the shape is constructed using magic power.

Accompanied by a buzzing sound.

Cao Rui extinguished the flame in the refining furnace and condensed the water spiritual power to pour it on the jade pendant that had already taken shape.

sizzle.

A white mist emerged.

Cao Rui used the art of controlling objects to take out a spiritual sound jade pendant that was glowing with a faint spiritual light from the mist and held it in front of him.

Because very little material is used, the Lingyin jade pendant has only a thin layer, about the thickness of two fingers, and is light blue in color.

The fact that he was able to successfully refine it is enough to show that Cao Rui's weapon refining skills have reached a high level.

"It's in good condition."

"The cost of materials is controlled within three spirit stones."

"The next step is to engrave the magic circle."

It is quite difficult to engrave two magic arrays on such a small jade pendant and connect them in series.

Cao Rui took a deep breath and began to use his magic power to engrave on the jade pendant.

First is the positive [sound transmission].

Using Cao Rui's perfect level 0 magic array engraving, it only took a cup of tea to successfully engrave [Sound Transmission] on the front.

Immediately afterwards, Cao Rui began to [transmit the image] in all directions.

Because this side needs to be connected in series with the [Sound Transmission] on the front at the same time as the engraving, the difficulty increases exponentially.

Even if Wu Qingxuan came, he might not be able to succeed in refining it.

Cao Rui calmed down a little and started to engrave directly.

As Cao Rui concentrated on engraving, the rune patterns of [Shadow Transmission] began to appear little by little on the back.

Cao Rui needs to be especially careful when connecting with [Sound Transmission].

Just like that, after half an hour, accompanied by a slight sound, the entire body of the spiritual sound jade pendant emitted a spiritual light.

"It's done." Cao Rui also breathed a sigh of relief.

If Wu Qingxuan saw this scene with his own eyes, he would definitely applaud Cao Rui.

With two magic arrays engraved on such a small jade pendant, in terms of 0-level magic, perhaps no one in the entire southwest of Yunzhou, or even in the Yunzhou cultivation world, can compare to Cao Rui.

If it works the first time, it means it will work the next time, and even in mass production.

Cao Rui held the Lingyin jade pendant, felt its communication signal, and continued to fine-tune the magic circle.

"Well, this can add a storage function to store the signal characteristics of your spiritual sound jade pendant."

"Add a 'dial' button, a 'hang up' button, and a 'connect' button, and add a location transmission function."

After Cao Rui's simple transformation, the first sound-transmitting jade pendant in the world of immortal cultivation was successfully produced.

It takes no more than an hour to refine the weapon and engrave the magic array.

Cao Rui then refined the second Lingyin jade pendant.

Then he called Ye Yunyin to test the effectiveness of the Lingyin Jade Pendant.

Holding two Lingyin jade pendants a thousand meters apart, Cao Rui began to dial the audio and video function.

A thousand meters away, the jade pendant on Ye Yunyin's chest suddenly vibrated slightly.

Ye Yunyin used his magic power to click the connecting button.

The image of Cao Rui suddenly appeared in front of him.

The Lingyin Jade Pendant reproduced the scene within one meter around Cao Rui, and appeared in a three-dimensional image before Ye Yun disappeared.

Ye Yunyin was slightly surprised, and then he saw Cao Rui in front of him and said, "Elder Ye, how do you feel?"

"Master Cao, I admire you. Except for the short communication distance, the functions of this Lingyin jade pendant are very good." Ye Yunyin commented.

"Well, now I will try to test the longest distance that can be transmitted by the Spiritual Sound Jade Pendant alone. Elder Ye, please stand still and don't move."

Cao Rui flew back.

When it reached a range of about three thousand meters, the connection of the Lingyin Jade Pendant was suddenly severed. It was obvious that the communication distance was not enough.

However, these prove that Cao Rui's perfect level 0th order spell inscription has pushed the effectiveness of this 0th order magic array to its maximum range of meters.

The sound transmission inscribed by ordinary cultivators, in the absence of a communication intermediary, generally has a transmission distance of only one kilometer.

The first-level sound transmission can reach a distance of more than 100,000 meters, but the material of the jade pendant refined in that way must also be improved, and the cost is too high.

"Next, let's try using the third-level magic array in Qingling Market as an intermediary to see how far the Lingyin Jade Pendant can transmit the message."

"Every defensive formation is a natural signal radiator."

"The sect's fourth-level formation can even reach the entire southwest of Yunzhou."

"Let's take a look at the effectiveness of this Qinglingfang City's third-level formation."

Cao Rui returned to the training tower and took out the small array plate of the third-level defense array of Qinglingfang City to make fine adjustments.

On the small array plate there is a first-order magic array [Remote Transmission] which is set up for the purpose of arranging the sound transmitter.

In the past few months, Cao Rui has been focusing on the cultivation of this first-order magic array [Remote Transmission] and has already perfected it.

With the help of Wu Qingxuan, Cao Rui has completely understood the connection between the sect's fourth-level formation and the small communication formation plate.

Cao Rui connected the small array disk to the communication frequency of the Lingyin Jade Pendant.

Cao Rui then flew to various locations in the market town where the large array plates were placed, and also made fine adjustments, connecting the signal frequency of the Lingyin jade pendant to the third-order large array.

It's easy to say, but it's hard to do without a perfect level of understanding of [Communication] and a thorough understanding of the basics of the 0th-order magic array. It's impossible to reach Cao Rui's level.

"Elder Ye, please cooperate with me again."

Cao Rui took out the Lingyin jade pendant and dialed the Lingyin jade pendant in Ye Yunyin's hand.

There was no lag in the process of Ye Yunyin connecting the phone. Apparently, even after the signal was transferred through the magic circle, there would be no lag in the speed it displayed.

Cao Rui summoned Feiyu and began to fly out of the market.

In the video, as Cao Rui got further and further away from the market town, Ye Yunyin's expression became more and more surprised.

"Just by connecting to the magic circle, can the communication distance be extended so far?"