No one knows the news of Zhao Chang'an's return. As soon as he returned to the Jade Collar, Zhao Chang'an rushed to the library where Kyle was.

Since the right was given, Kyle University has been committed to the work of the library. In less than half a month, while hiring a large number of players, the Jadeite Library has begun to reach its scale and has more than 2,000 books in it. All of these books were written by Kyle with the books he had read in his mind.

"Your Highness, you are back"

After seeing Zhao Changan, Kyle put the book in his hand aside without any haste, and even looked it carefully to prevent the inside of the book from being folded.

"How about the Four Knights of the Apocalypse? Also, what's going on with the news that Dracula had sent to me before?" Zhao Changan went straight to the topic.

Kyle was not surprised at all about Zhao Changan's straightforward question. After all, Dracula had left less than an hour before Zhao Changan came back, which shows how anxious Zhao Changan was.

"Your Highness, please see, this is my invention." A small crystal appeared in Kyle's wrinkled hand, the size of a soybean, and it seemed that nothing could be seen on the surface.

Zhao Changan did not have any impatient expression, but instead looked at it carefully. With his mental power, Zhao Changan soon discovered the difference between this crystal.

There seem to be many runes engraved inside, and the circuit inside is so complicated that it makes the scalp numb.

"Tell me, what is the function of this thing?" Zhao Changan said after reading it for a long time but couldn't understand what it was.

"Your Highness, please put it in your ears," Kyle said with a smile.

Zhao Changan made it according to Kyle's requirements. This thing is only the size of a soybean, and it is just right in your ears. It is not as hard as you imagine. Instead, it is very soft and can perfectly match your ears.

Kyle didn't know where to find another crystal and stuffed it into his ears.

"Your Highness, can you hear me?"

"Yes," Zhao Changan said without hesitation.

But the next moment, Zhao Changan keenly discovered something wrong!

The sound seemed to be coming from the crystal in my ears, and with Kyle's opening, the crystal would also vibrate slightly.

Zhao Changan looked surprised and said, "How far can this thing reach the farthest range?!"

"One hundred kilometers is the farthest distance. If you want to be further away, you need to replace the crystallization material. After all, this is just the most ordinary rotten rat crystal, and there is no way to carry more runes and loops."

Kyle took out the crystal in his ear and put it in his hand and said with a smile: "Your Highness, in addition to this, you can also make multiple channels of calls. You only need to control your mental power, which can perfectly solve the problem of poor calls from a large number of people."

Zhao Changan also took out the small crystal in his hand and put it in his hand and played with it. Who knows that Zhao Changan is actually a real-time communication method in the hands of players.

Instant communication methods are not without them in today's era, but their prices are quite expensive and they cannot be popularized at all. At least in this area, it is rumored that the Federal Center has popularized instant communication technology, which is one of the reasons why the Federation can win every battle.

Instant communication means will not only bring considerable convenience in life, but especially in the military. If this thing is available, then Zhao Changan will have considerable confidence in winning the next war with the Bloody Castle.

"What is the specific cost?" Zhao Changan said impatiently.

As long as the cost is not too high, even if you grit your teeth, Zhao Chang'an will be a human being, and then it will be popularized on a large scale.

"Your Highness, it only takes two rotten rat crystals to a communicator. It's thanks to your highness."

Zhao Chang'an:???

Why is it thanks to myself?

"The players under Your Highness have systematic knowledge. I have been posting tasks to players recently. In half a month, I have already gained some basic understanding."

"The knowledge system shaped by different cultural heritage is also completely different. If you have the opportunity, Your Highness, please allow me to go to the world where the players are. I hope to learn more."

When it comes to learning, the eyes of the great master Kyle were about to shine. Zhao Changan couldn't help but secretly complained in his heart. Going to the world where the player is located? It's probably impossible, but this communicator is really good...

"Then hurry up and try to set up all the people in the Jade Corner. The war with the Bloody Castle will soon begin. I need more chances of winning." Zhao Changan's voice was cold.

"What's wrong with the Four Knights of Apocalypse?" Zhao Changan asked.

Kyle took out a sign from his hand and handed it to Zhao Changan. The sign was cold, as if it was about to penetrate the soul. On the battlefield where the corpses were carved, four knights holding different weapons occupied different directions.

"The Four Knights of the Apocalypse have initially built their own knight orders and are waiting for your Highness's orders at any time. This nameplate is a certificate. As long as you pass the nameplate, your Highness can communicate with the Four Knights of the Apocalypse at any time."

"In addition, the four knights hope that His Highness can divide them into a land of death as soon as possible for them to live and train."

Zhao Changan was a little embarrassed for a moment, and everything else was easy to say, but this place of death was really a little embarrassed. As the name suggests, the place of death was a very special place. A large number of creatures died in the later stage of death and the souls eventually became resentful spirits. Under the erosion of years of death, the land of death was finally formed.

Otherwise, the Four Knights of Apocalypse are weird, and they don’t want a good Void Dimension, and they have to ask for a place of death. It’s really amazing.

"Your Highness, the Four Knights of Apocalypse will bring considerable help to Youth Highness in the future. I think Your Highness should still meet their requirements." Kyle gave a timely reminder.

How could Zhao Changan not know this truth, but it is really difficult to find a place of death...

"Your Highness, I think Scarlet Castle is a place that is very suitable for converting into a place of death." Kyle said chilling words with a smile.

However, Zhao Changan's eyes lit up. What Kyle said was indeed a good method. If he was not a member of my race, his heart would be punished. Zhao Changan had no sympathy for the blood envoy.
Chapter completed!