Simulation System
Chapter 15's

Rein could only be shocked because Grandpa Zion seemed to be able to figure out his current cultivation level.

The Demon Technique has a hidden essence. Although Rein did not directly hide his cultivation level, but with all the Demon Techniques he mastered, it made his body involuntarily hide his own cultivation level.

Even the teachers in the school could not directly guess the level of his cultivation. Of course if the Masters scanned his body directly, his cultivation level would be revealed.

But just by looking at him, Grandpa Zion seemed to know his true cultivation level?

"You don't have to be surprised. Although I am no longer what I used to be, the experience I have is very rich. I can tell when I see you more carefully." Grandpa Zion replied casually as she sipped the warm tea that was on the table.

Rein scratched his head in embarrassment and said: "Grandfather Zion is indeed amazing. With just a mere glance, Grandpa Zion could figure it out quickly."

Grandpa Zion smiled humbly: "That's nothing. By the way, you gave me a surprise. I didn't expect you to have such a high increase in your cultivation. No wonder you have free time and come here."

"Indeed, with this, my position is perfectly safe within the Academy." Rein nodded in agreement.

Thinking about it for a while, Rein opened his mouth and said: "By the way, about my increase in strength..."

"No need to tell me the secret you have." Grandpa Zion instantly stopped Rein from continuing her words.

Rein did plan on telling Grandpa Zion a little of her secret. It was like he had the ability to enter an empty world within his mind and train there. But since Zion's grandfather said that it was unnecessary, Rein also closed his mouth.

"Everyone has their own secrets. As long as it doesn't hurt anyone else, everything's fine." Grandpa Zion said calmly.

Rein nodded obediently.

Grandfather Zion had a very high level of empathy towards other humans. He always taught children including himself not to be blind with the power they have in the future.

"I want to know one thing." Grandfather Zion sipped a warm tea casually and said: "Will this speed of improvement last for a long time or a short time?"

Hearing Grandpa Zion's question, Rein was confused and clueless.

He immediately thought of his Simulation System. If there were no mistakes, this Simulation System would help him improve so quickly, even he had no idea how far he would go with this Simulation System.

"If nothing bad happens to me, this increase will last a long time." Rein replied calmly.

Grandpa Zion closed her eyes and tapped the table with her finger.

Rein somehow became nervous as Grandpa Zion closed her eyes.

Moments later, Grandpa Zion opened her eyes and said: "Better, you hide your true strength."

"Hm? Is there a reason for that?" Rein asked Grandpa Zion.

Rein also planned to hide his true strength, but that was due to the reason for his excessive cultivation level increase, and he did not have sufficient reason to describe why he had increased so quickly.

"The first thing is, it's for your own good." Grandpa Zion turned to the side, and looked at the place where the children were playing on the playground.

But the look in his eyes was more precisely directed at the figure of Viola who was playing with children.

Rein followed Grandpa Zion's direction, and immediately understood what Grandpa Zion meant.

"And the second is, it's to get rid of the eyes of people who have a strong family or organization to take advantage of you." Grandpa Zion said calmly.

Utilizing me? Rein understood little for this part.

"Of course if you are very strong, you can escape from the rope that has been tied to your neck. But is the world that good? More precisely, the mind of a family leader or organization can be quite cruel. They will not hesitate to use other tricks to control you and let you work for them even longer.

"If you have enough identity, it's okay to stand out. But if you don't have any identity standing behind you, your future will be controlled by someone else." Grandpa Zion explained everything calmly.

But Rein who listened to Grandpa Zion's explanation somehow felt that this was not simple knowledge?

When a person shares knowledge with another person, the knowledge shared by that person can come from a data and facts that they know, and the other thing is, that is, they have personal experience of the topic themselves.

And by the way, Rein never knew Grandpa Zion's true identity, nor did he need to think about it.

But by just looking at him, Grandpa Sion was able to see his true cultivation level. This even surpassed the Master Teacher Academy disciples who had a Spirit Master cultivation level, didn't that mean Grandpa Zion in the past was much more outstanding?

Reflecting on Grandpa Zion's words, Rein opened his mouth and asked: "Does Grandpa Zion have any suggestions for the path I should take in the future?"

Grandfather Zion looked at Rein deeply before mentioning a name that made Rein shocked.

"The Underground World."

The underground world as the name suggests, it is an environment that is in the realm of darkness and is full of bad and negative things!

"Are you surprised I'm suggesting this?" Grandfather Zion smiled as she saw Rein shocked at the advice he gave.

"It would be a lie if I said no." Rein nodded and admitted it.

As far as Rein was familiar with it, Grandfather Zion was not the one who would steer the path of others down a bad path, there must be a reason.

"Do you know how the history of the Underground World was formed?" Grandpa Zion asked Rein.

Rein nodded and replied: "The Underground World is the World created when the Tragedy of 10,000 years ago occurred. Back then, the human realm was invaded by Monsters and other Races, and had to retreat and hide.

"Because humans cannot go to other powers, and humans are not willing to leave the territory they have, he said, humans decided to form the Underground World and live in it while they hid and survived, and increased their strength.

"Finally with the struggle of mankind, they managed to repel one by one the enemies who occupied their territory, and regained their foothold on the ground.

"After humans set a solid foundation and stood firmly on the ground, the Underground World was left behind.

"But after humans defeated all external enemies, internal enemies also emerged shortly after the war ended.

"And the mentioned internal enemies used the Underground World as their foundation and formed their own power."

Rein explained it in one go.

Grandfather Zion nodded repeatedly: "Your historical knowledge is not bad."

"Teachers bring up this topic of history repeatedly in their classrooms." Rein scratched his head in embarrassment.

"Yes, what history tells us how the Underground World was formed is indeed true. But the end of history is very different, and not like that." Grandpa Zion said calmly.

"I mean grandpa?" Rein asked curiously.

"There were two leaders of the human race back then." Grandfather Zion said softly: "One of them reigns above ground, and the other reigns in the Underworld."