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....

The next day, I brought Rias and the others to an isolated training ground. To ensure uninterrupted training, they had all taken a leave of absence from school. Since Rias was the territorial Devil of Kuoh Town, such arrangements were easily made.

"Kyoya, how are we going to train? Do you have a plan?" Rias asked curiously.

As soon as Rias asked the question, everyone looked at me with anticipation. After all, I had promised to significantly increase their power within a week.

Devils had long lifespans, so their power grew incredibly slowly. Issei Hyoudou, the protagonist of the original story, had to sacrifice his own lifespan to drastically increase his power in a relatively short amount of time. This showed just how difficult it was for Devils to increase their power.

If anyone else had made such a claim, they would have dismissed it as impossible. But knowing my personality and past accomplishments, they unconditionally trusted me. Otherwise, they would have been far more skeptical.

...

"Before we start training, I'd like to have a little spar with Rias," I announced.

"What? With me? Why?" Rias asked, confused.

The others were also puzzled, not understanding my intentions.

"Don't worry about it, Rias. Think of it as me getting a feel for your current strength. Hit me with your strongest attack. Don't worry about hurting me." I requested.

"Alright, if that's what you want, Kyoya. Here I come." Rias warned.

Rias activated her [Power of Destruction], a crimson aura emanating from her. She spread her Devil wings and unleashed a powerful blast of destructive energy towards me.

Boom!

A loud explosion echoed, and a cloud of dust and debris filled the air. When it cleared, a giant skeletal figure was revealed—[Susanoo].

Rias's destructive blast hadn't even scratched it!

Everyone was stunned to see that I was completely unharmed, not even a hair out of place.

After all, this was the Gremory family's signature [Power of Destruction], yet it hadn't even made a dent. It was hard to fathom just how strong I really was.

"I concede defeat, Kyoya. You're way too strong. It's insane!" Rias said, feeling a little dejected.

[Ding! Task completed! Host received a Red Grade gift bag! Opening the gift bag. Congratulations, Host, for obtaining the Magic Power and Physique Enhancement Card.]

Just as Rias admitted defeat, the system notification for task completion rang in my mind. That's right, I had used this mock battle to complete the Red Grade task that I had gotten from Rias long ago.

"Kyoya, you're such a bully. You were this strong, but you still made Tomoe-san and Kiba fight you." Akeno pouted playfully.

Kiba just smiled wryly and didn't say anything, though he did look at me with a hint of exasperation.

"Hey, don't misunderstand. I wasn't this strong back then. Don't get the wrong idea!" I said, feeling a shiver run down my spine at Kiba's gaze.

"!!!!"

"Kyoya, are you saying you reached this level of power in such a short amount of time?" Everyone was shocked.

"Of course. Otherwise, how could I promise to increase your powers? Now do you believe me?" I said, a confident smirk on my face.

"If that's the case, then I'm even more excited about the training." Akeno's smile grew wider.

"Agreed! Please train us rigorously, Kyoya-senpai!" Koneko's eyes sparkled with excitement.

"No problem. Let's start by addressing Rias's bottleneck." I looked at Rias.

"Rias, your biggest problem is your lack of magic power. You can't sustain high-intensity battles for long. Your [Power of Destruction], in terms of pure destructive force, is nearly unmatched among Devil clans in the Underworld."

"But your mastery of it is still insufficient. That's something you need to work on yourself, and I can't help you there. But I can help you with your magic power problem."

"Hmm... mastering the [Power of Destruction] isn't easy. Even Onii-sama struggled with it. It's impossible for me to make significant progress in just one week." Rias sighed, a little discouraged.

"You're wrong about that, Rias. Your brother is hiding his true strength. He may be a Maou, but his power has reached the level of a Transcendent/Super Devil. His mastery of the [Power of Destruction] far surpasses that of the previous Four Great Satans." I said with a grin.

...

Sirzechs inherited the [Power of Destruction] from his mother's side, the House of Bael. He could compress his [Power of Destruction] into incredibly powerful spheres and control them freely.

Currently, he holds the title of Lucifer, one of the Four Great Satans.

He was one of only three Devils who had transcended beyond the level of a Maou (the other two being Ajuka Beelzebub and the leader of the Khaos Brigade, Rizevim Livan Lucifer).

In fact, Sirzechs had even unleashed his true form, which terrorized even the God of the Underworld, Hades.

...

But Rias, at her current level, had almost no chance of reaching that level. But with me around, reaching that level would be smooth.

"Transcendent? Kyoya, what's a Transcendent?" Everyone was confused by the term. They had never heard of it before.

"Well, it's not surprising that you don't know. I'll explain. A Transcendent is someone whose power surpasses the Maou-class level. There are currently only three such Devils. Other examples include the Thunder God Thor, Shiva, and Zeus. They're all Transcendents."

Everyone was stunned. They hadn't realized that there was a power level above Maou-class!

And they were even more shocked to learn that Sirzechs was hiding such power. Even Rias was stunned to learn of her brother's true strength.

After all, the beings mentioned were all renowned gods from various mythologies! God of Destruction Shiva, the Thunder God of Norse mythology, and so on.

It was no wonder they were shocked!

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