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She could even clearly smell Serafall's fragrance. Remembering that Yang-kun was watching, she hurriedly pushed her sister away.

"Cough, cough... My relationship with Sister isn't like that, Yang-kun. Don't misunderstand."

Unable to deal with her sister anymore, Sona said with a flushed face.

Having Serafall make such a move in front of Su Yang, one that undermined the dignity of the Student Council President, truly made her a little embarrassed.

"Anyway... this is for you, Yang-kun. Also, I'm actually a devil. You should know that already."

"Mm, I just found out."

Su Yang looked at the transparent Crystal Ball with interest.

He believed that this was definitely not something Sona Sitri or Serafall could have created.

He could easily see through Ultimate Devil-level magic, and he could comprehend nearly half of Maou-class magic, but he could not make sense of this thing at all.

"That's good. I'll explain the specifics to you tomorrow, Yang-kun. You must be tired today too, so Sister and I won't disturb you any longer."

"You only need to know that devils aren't evil, Yang-kun."

Sona said seriously.

Since Su Yang did not want to expose his Avatars, Sona could only sense that his Spiritual Power was at the level of a Low-class Devil and was now nearly depleted.

"Don't worry, President. I know devils aren't evil. Otherwise, wouldn't the President have eaten me already?" Su Yang said with a smile.

"Also, I'll take a good look at this. Quite a lot of knowledge really did surface in my mind today, and I need time to digest it."

Su Yang nodded again. He truly was interested in what the Crystal Ball contained.

"Mm, then I'll see you tomorrow, Yang-kun."

Sona gave a slight bow, then tugged on Serafall's cheek as a Teleportation Array appeared beneath their feet.

"Whoosh~~"

As though she were fleeing, Sona dragged the Serafall clinging to her away from Su Yang.

So embarrassing~~~ This was absolutely too embarrassing!~

"Uh... all right."

In the blink of an eye, he was the only one left. Su Yang could not help but laugh wryly.

But this was perfect. He had wanted to study what exactly was inside this Crystal Ball.

Using the power of [Vamana, the Dwarf], Su Yang returned home.

"My maximum Spiritual Power and physical strength still need to improve~~"

Su Yang frowned. If his physical strength reached the level of a High-class Devil, he could absolutely subdue Heige and the Monkey King with ease. Even fighting Serafall would not be difficult.

Humans used Spiritual Power, devils used magic power, angels used Holy Power, and onmyoji used Curse Power. Fundamentally, they were all similar, differing only slightly in nature.

If he became a devil, he could gain at least the power of an Intermediate Devil. With a Queen Piece and his talent, he could basically become a High-class Devil by the next day.

But... he still valued his identity as a human.

Moreover, reality was indeed different from what he had imagined. His potential was too great. Although his strength was growing rapidly, it was extremely difficult to forcefully raise it in an instant.

After obtaining Vishnu's Ten Incarnations, his body was constantly strengthening, albeit slowly. Reaching the level of a High-class Devil would only take three or four months.

If others knew that he still found this growth rate slow, they would probably want to smash him to death with a hammer!

Naturally growing from a Low-class Devil to a High-class Devil in three or four months—even the descendants of gods would feel inferior.

The other issue was his need for greater physical strength. With his current physique, he could use at most two Avatars at once. If he could use three Avatars, he might have been able to do more during his battle with Heige.

But in reality, using the [Krishna] Avatar together with the Copycat Eyes to break magic, while using the [Vamana, the Dwarf] Avatar to enhance his mobility, and barely maintaining an undefeated position was already his limit.

If a User of God-Killing Weapon knew what Su Yang was thinking, they would probably collapse as well.

When a User of God-Killing Weapon was at the level of a Low-class Devil, even risking their life, they could at most kill a High-class Devil. And only users with top-tier talent like Vali could manage that.

"But... what exactly is this thing?"

Su Yang pressed the red button beneath the transparent Crystal Ball, one look enough to tell that it was meant to be pressed.

Since Sona had given it to him, it certainly was not something meant to harm him. Su Yang had that much confidence.

"Beep!~~"

The moment Su Yang pressed it, a man's phantom appeared above the Crystal Ball.

"Maou... Ajuka..." Su Yang immediately recognized who the phantom was.

After Maou Ajuka's phantom appeared, it began speaking on its own.

"Hello, fortunate young man. I am Ajuka. At the request of the Next Head of the Sitri Family, I will serve as your teacher for this period of time."

Ajuka spoke kindly.

Su Yang narrowed his eyes slightly.

Sona?... Had Sona asked Ajuka for this? What price had she paid?

"I will teach you much knowledge about magic, knowledge that can be considered top-tier even in this world. However, this knowledge belongs to the devil side. I hope you will not spread it outside, or I will personally clean house when the time comes."

Ajuka continued.

Su Yang listened silently. The restrictions outside were very powerful, but the magic within was simple. With one glance, he could see how the magic was used.

Essentially, it was an offline instructional video.

Yes, offline. As a Maou, Ajuka did not have enough time to personally teach someone.

"First, this."

After rambling on for a while, Ajuka's lesson officially began.

"The simplest method for constructing a Magic Circle..."

A small Magic Circle appeared in Ajuka's hand.

"Ah~~~ Got it." Su Yang pressed the button that looked like fast-forward or the next lesson.