-943- The improvement between 12 years

Actually, initially, Natsuki didn't plan to shape Rozen into a perfect man in all aspects; she just wanted to raise him. The expectations for Rozen weren't very high.

Until Rozen gradually grew up, displaying an exceptional learning ability. He read through the magical and academic books Natsuki brought home, memorizing them instantly. This ignited Natsuki's determination.

In simple terms, Rozen's extraordinary learning ability sparked Natsuki's interest. Coupled with Natsuki's growing dedication to the role of a teacher, she initiated her own development plan for Rozen.

To be honest, initially, Natsuki never expected her brother, who was only interested in reading and playing games, to reach such heights. Regardless of the subject, with patience, Rozen could learn it in a very short time, even if he appeared reluctant and impatient.

Especially with the academic research books Natsuki brought home, Rozen could read and completely memorize them within a day. He even applied the knowledge, subtly showing a tendency to surpass Natsuki, who was a teacher. This left Natsuki speechless for a while.

Only then did Natsuki fully ignite her determination. Fueled by her sense of responsibility as a teacher, she wholeheartedly began nurturing Rozen.

Now, even at school, Rozen is required by Natsuki to present the most perfect image. Coupled with Rozen consistently topping the charts, he has become the school's recognized idol. At graduation, numerous girls cried passionately, and even some boys couldn't hold back tears – a remarkable story.

Of course, in Rozen's words...

"A group of elementary school kids crying around me, and I just feel like my brain is pounding."

From this, it's evident that Rozen himself finds all of this quite tiring.

However, among Natsuki's numerous teachings, there was one aspect Rozen never rejected.

That is...

"Buzz..."

When Rozen's hand passed over the table and touched the tea set and utensils that Natsuki had already used, with a magical fluctuation, the space experienced a slight disturbance.

The next moment, whether it was the tea set or the utensils, they disappeared as if evaporated, leaving no trace.

Natsuki watched this scene, expressing satisfaction and nostalgia.

"Your spatial manipulation magic is becoming more proficient. If you continue like this, reaching my level shouldn't be a problem."

Natsuki sighed for this.

Yes.

Since Rozen studied everything from daily chores to aristocratic etiquette that Natsuki taught him, as a pure-blood witch, Natsuki naturally couldn't omit teaching Rozen magic.

However, Natsuki never expected Rozen to display such exceptional qualities in magic.

A truly extraordinary talent.

"Originally, spatial manipulation magic is one of the highest-level magics. Even high-level mages can only use it with great effort. Someone who can manipulate it so easily and proficiently, I haven't seen anyone else in this world besides myself."

Natsuki glanced at Rozen and spoke confidently.

"Now, you're one of them."

Regarding this, Natsuki genuinely felt a mix of satisfaction and worry.

Satisfaction because Rozen possessed such a talent, and as a sister, she couldn't help but feel happy.

You see, even Natsuki need to form a contract with a demon in order to obtain this ability. Rozen, on the other hand, achieved similar feats solely based on his own talents. How could Natsuki not be delighted?

However, at the same time, Natsuki knew that having abilities beyond the ordinary in this Demon Sanctuary might not necessarily be a good thing. Undoubtedly, there would be people with ill intentions due to Rozen's unique abilities and power.

Even Natsuki herself, because of her status as a pure-blood witch, lost a considerable amount of freedom on this artificial island. So, she harbored concerns about this aspect.

This Natsuki doesn't know that, over these years, Rozen has not only excelled in spatial manipulation magic. Although Natsuki's teachings in spatial manipulation magic were indeed significant for Rozen, he achieved much more.

Upon arriving in this world, one of Rozen's goals was to address his magical power issues.

Therefore, he persisted in relentless research and practice over the years. Otherwise, he wouldn't be struggling to use air conditioning after overexerting his magic last night, leading to the current state.

Certainly, Rozen reaped rewards over these years. For instance, in the field of summoning arts, possibly due to Rozen's success in realizing the "Heroic Spirit Summoning," his progress was nearly described as "leaps and bounds."

Rozen thoroughly grasped summoning at all levels – lower-tier, mid-tier, and upper-tier familiars. He mastered all the rituals for summoning at these three levels, leaving out only the summoning of the top-tier familiars.

Additionally, in magical power research, Rozen made progress, blending the "Crimson Wing Formation" and the "Infinite Chain Reaction." This fusion allowed the amplification factor of the "Crimson Wing Formation" to extend beyond just ten times, reaching even higher multiples. After years of research, Rozen finally saw some promising signs.

This is the ongoing research Rozen is conducting and a plan he envisioned in the past. To achieve this, Rozen initially sought to acquire knowledge about the "Infinite Chain Reaction."

The goal was to integrate it with the "Crimson Wing Formation" and develop a secret technique capable of infinitely increasing magical power.

After years of effort, Rozen has made preliminary progress in this research – an astonishing achievement.

Originally, using the "Crimson Wing Formation" demanded stringent physical requirements, and the "Infinite Chain Reaction" needed matching amplification mechanisms based on different magical circuits. Wanting to merge the two without mutual interference was akin to walking a dangerous tightrope.

Rozen's ability to use the "Crimson Wing Formation" was based on manipulating magical circuits through incantations, where magical circuits would influence the body's principles. Rozen came up with the idea and succeeded in carving an incantation into himself, granting a physique equivalent to the "Crimson Wing Blood." This process, as mentioned before, was extremely arduous, almost like seeking death.

Now, Rozen needs to incorporate the principles of the "Infinite Chain Reaction" into this foundation. His body must not make errors and should remain unchanged, allowing him to use the "Crimson Wing Formation" techniques.

Moreover, Rozen has to gradually adjust until the "Infinite Chain Reaction" also takes effect without affecting his body.

How can such a complex, complicated, and chaotic task be easy?

If control slips, Rozen could easily end up with a catastrophic outcome – bursting into pieces.

The danger is evident.

Fortunately, Rozen now possesses the "Mind's Eye" ability, which allows him to reach the divine realm.

Once he senses something amiss, he immediately terminates and halts the process. After spending a whole decade exploring new methods, he has finally achieved some results.

Upon closer observation, one would notice that the seal on Rozen's left hand, although still depicting three interlocking rings, is formed by countless intricate spells and incantations on each ring.

This is the result Rozen has obtained – the new "Crimson Wing Formation" technique after integrating the "Infinite Chain Reaction."

However, this technique has two significant and unavoidable flaws.