Long Yi was silent for a while, thought about it carefully, then looked up at the emperor, wanting to speak but stopping.

"Just say something, I have never seen you as a mother-in-law like you." The emperor obviously saw that Long Yi had an idea.

Long nodded and whispered: "I have an idea, but this idea is extremely immature and full of great threats. If you are not lucky, it may drag down the entire empire. So I don't plan to tell you now, but considering that you are smarter and cunning than me, I think you should be able to make accurate judgments on the degree of threat to this matter, so I plan to tell you. So now I am in a conflict, whether I will tell you or not."

Cry looked at Long Yi's eyes. He knew Long Yi's character. This young man, who was only nineteen years old, had the ability and enthusiasm that was completely inconsistent with his age. The series of crises that the empire experienced in succession were almost all relying on Long Yi's activity in it to easily escape. The crystal core research of the White Dragon Empire came from Long Yi's help; the combat armor of the White Dragon Empire; the help of Long Yi; and the research of the molten beast also came from Long Yi's help.

What Long Yi did did not demand any reward at all, and he did not even ask the emperor for a medal!

As the late emperor once said to Kree, if Long Yi was allowed to become the emperor of this country, perhaps soon the world would be unified under the White Dragon Empire. He also said that if Long Yi wanted to kill this country, it would only take a minute.

However, Cry chose to trust. Because he could feel that Long Yi really had no interest in this country. The only thing that made Long Yi worry was Elsa far away in the upper plane.

This stage in the human world is still too small.

But now, he could see Long Yi's troubles.

"No, I don't think you should tell me," said Cry, "because once you tell me, I'm very likely to make irrational decisions in the face of great gains after success. Maybe I'm very cunning, but I lack rational enough. Long Yi, I hope you can make a judgment for me. Can this be done?"

Long Yi looked at Kree and saw the absolute trust in the other party's eyes.

"I need to think about it again. I always thought I was brave enough. But I really didn't dare to draw conclusions casually about this matter. Maybe I should go to some experts to help." Long Yi said very seriously.

"Okay, if you decide any plan, please let me know. Within the scope of my emperor's authority, no matter what you want, I can absolutely satisfy you." Cry said.

"real?"

"real."

"What if you want your throne?"

"For you too."

"Damn, so straightforward! You and your father are really biological father and son." Long Yi shook his head and left.

Looking at Long Yi's back as he left, Cry smiled and said, "If you can give you an emperor's position to exchange for the destruction of the enemy, then who else can you do if you don't belong to this position? I'm afraid you won't care."

Erin and Long Yi left the palace and went straight to the research institute.

In fact, recently Irene could clearly feel a faint feeling of anxiety on Long Yi. In the past, Long Yi looked over-energy no matter where he went. But in recent times, Long Yi has been in a daze significantly. Erin knew that Long Yi was worried about the matter of the Crazy Demon Plane, but she couldn't help.

"Let's go to the Underworld." Long Yi suddenly said while walking on the road.

"What?" Erin was stunned.

"I said, let's go to Undercity. Undercity has a long history of using crystal cores. They may be helpful to the current situation." Long Yi said.

"Why, we will also bring the core of the crystal cores and molten beasts we made to show them. Maybe there is any room for improvement." Erin said.

“It makes sense!”

After rushing to the research institute, Long Yi explained his purpose, he immediately received support from several research institutes. After all, he is the only person who has really dealt with Undercity. Undercity's use of crystal cores has reached its peak. If the help of Undercity can be obtained, the quality of these crystal core products will be roughly improved by a certain level.

The Dark Clan is essentially the core clan created by the giant back then. Long Yi, as the giant who activated the Dark Saint, has actually become the master of the Dark Saint, but he has never exercised this power, and he has put himself in touch with others. No one will hate the fact that he has a master.

However, Long Yi really needed their help, so he could only scratch his head and activate the contract, calling on the help of the Dark Saint.

Then, that night, the insect cart appeared in the secret room of the institute along the last path.

This is a specially-packed secret room, designed to prevent anyone from discovering the connection between the White Dragon Empire and the Undercity.

Two Undercity Guards led Long Yi and Erin into the car, and the insect car immediately closed the tunnel completely to prevent anyone from peeping.

After a series of long journeys, Long Yi and the others finally arrived in the Underworld again.

The Dark Saint had already arrived at the terminal station to wait. The complex machinery on her chest was flashing with brilliant light, and the residents of the nearby Dark City were all fascinated by the light.

"Master, you are here!" said the Dark Saint.

"You should call me Brother Long, it sounds so awkward to call my master." Long's scalp became numb when he heard the word "Master".

"Okay, Brother Long! Let's go!" The dark saint screamed sweetly.

"good!"

Long Yi and Erin quickly followed behind the Dark Saint.

The three of them came to the Saint's Hall. In the center of the huge and empty building, there was a huge sphere, dark golden all over, covered with crisscrossing fine patterns, and they were constantly spinning and splicing.

"Brother Long, I have checked the knowledge of our core clan. There are really records about the Crazy Demon Plane." The Dark Saint said.

"Is there any good news?"

"Yes." The Dark Saint glanced at Erin, then looked at Long Yi with an inquiring look.

"It's okay. You can say anything in front of Erin." Long Yi said.

Erin knew very well that the Dark Saint was going to say something very confidential. Long Yi's words were obviously a great trust in herself, and she was grateful.

"Then, I'll just say it. In the era of giants, giants were keen on exploring different planes and planets, and the Crazy Demon plane was naturally one of them. The creatures in the Crazy Demon plane were extremely powerful, but far inferior to giants. What really caused trouble to giants was crystal poison. Giants believed that crystal poison was actually an extremely small miniature symbol that swallowed the body and energy of the host in a symbiotic way. It formed a crystal nucleus in the host body. If the host was very weak, the host would die before the crystal nucleus condensed. If the host was strong enough, then after the crystal nucleus condensed, the crystal nucleus itself would have a new consciousness, which would try to kill the host's consciousness and act instead of the host. If the host was extremely powerful, the crystal nucleus would choose to be accompanied. The host's protection was obtained by enhancing the host's body."

As the Dark Saint said, the golden sphere transformed into a crystal nucleus and a host, demonstrating what the Dark Saint said to the three of them.

"I remember that I was also attacked by monsters and was also infected with crystal poison, but nothing serious was wrong." Erin said.

It was while hunting monsters. Erin was infected with crystal poison, and Xiao Zi provided a spell to help Erin detoxify and also obtained crystal core gloves.

"That's different. The crystal poison you are in is not a crystal poison in the strict sense. Only monsters from the Crazy Demon plane, which are above the level of the Great Demon in your mouth, will carry real crystal poison. And what was infected at the beginning were just some toxins with crystal poison characteristics." said the Dark Saint, "In the Crazy Demon plane, the air is full of crystal poison. These crystal poisons will disguise themselves as cells of the body, so after being infected, there will be no symptoms at the beginning. At the same time, the crystal poison begins to swallow biological cells and replace them with themselves. At this time, people will not have any symptoms at all.

The feeling of pain will make you feel excited and have infinite power. Depending on the strength of the creature, this process will last for several days or even years. Once the devouring process is over, the crystal poison will burst out in a short time, and the creature will completely crystallize within five seconds. At the same time, it will condense crystal nuclei in the body. The crystal nuclei will constantly try to kill the creature's original consciousness. That is the last chance of a creature. If the creature's consciousness is strong enough, it may struggle, but at that time it will be too late, and its own consciousness has long been destroyed and broken, in other words, it is crazy."

"That's why I was called the Crazy Demon Plane..." Erin thought.

"It seems that this crystal poison is not a specialty of the Crazy Demon plane?" Long Yi felt that it seemed to be the invasion of some foreign creature?

"Yes, the creatures in that plane were originally called the demon clan, and the crystal poison came from another plane." said the Dark Saint.

"Okay, thank you for your popular science. Then... is the second question." Long Yi said.

The Dark Saint nodded, then patted the golden sphere, and complex runes and formulas appeared above the sphere.

"Even a giant cannot completely resist the erosion of crystal poison, so the giant later invented a vaccine, which used the vaccine to cause infection of crystal poison to be 100%. The giant also verified it on humans, which is also effective for humans. However, the way to prepare a vaccine is very troublesome," said the Dark Saint.

"How troublesome?" Long Yi asked.

"First of all, there must be a big monster, alive."

It's really troublesome!

Originally, there were few big monsters in this world. After countless hunts, the only remaining monsters were slaughtered, let alone alive. Moreover, according to relevant records, once the big monsters were captured alive, they would immediately turn on the self-destruction mode. A radius of 100 meters did not grow in an area, and even the Dragon Knight would be seriously injured. Want to capture them alive? It was not that easy!

"Is there any other way?" Long Yi asked with a fluke mentality.

"It's gone." Saint Darkness said seriously.

"That's a problem. It's enough to be a big demon's self-destruction. How did the giants make the big demons obedient at the beginning?"

"The giants have countless ways to make the monsters obedient, but humans cannot."

"How about mental control? Xiao Zi should be able to help." Long Yi said, "The Banshee's mental attack should be effective against any sensible creature."

"There will be some effects, but not obvious, and it is not even better than the freezing effect. But whether it is mental impact or freezing, there is actually no great effect. If you just make the big monster obedient, it is difficult, but if you just don't act as a big monster, Undercity has a plan, but this plan is not mature. Brother Long, you need to find human scientists to carefully study a more mature plan."

"What is it?" Long Yi's eyes lit up.

"Quick neutralizer." said the Dark Saint, "At the beginning, when we decided to use the crystal nucleus as the power source, we also encountered the self-destruction of monsters. So we invented the neutralizer to delay the self-destruction of monsters. This technology can almost successfully delay the time for monsters to self-destruction for half an hour. However, before this technology was put into use, we had an easier way to obtain the crystal nucleus, so the development of the neutralizer was suspended. I think those smart human scientists should be able to use this to create almost real neutralizers."

As he said that, the Dark Saint took out a small bottle from the dark golden sphere, and the bottle contained a red liquid. "This is the only experimental liquid that has been preserved."
Chapter completed!