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In alchemy, creating magical items requires various magical materials.
There are generally three types of materials considered magical.
First, materials harvested from magical creatures, such as dragon nerves or unicorn tail hairs.
Second, mystical plants like dittany.
Third, substances imbued with special mystical significance by collective subconscious beliefs, such as incense ash, grave soil, or morning dew.
However, there's another kind of material—one that is rarely discussed but highly effective and was commonly used in ancient times.
…Humans!
Both Muggles and wizards have historically been used as magical materials in the laboratories of powerful wizards during ancient magical eras.
Since humans can disturb magic through thought, they naturally qualify as magical materials—high-grade ones at that.
After Hermione's reminder, Roger realized that while his ordinary alchemy talent was average, changing his approach to human transmutation would instantly make him a genius!
Muggle society has long researched biological computing. Roger believed he could integrate those ideas with his magic, using his own body as alchemy material to forge an internal biological computing system—a wetware biological computer tailored to his needs!
If this succeeded, he wouldn't even need the risky brain modifications associated with magic. Instead, he could create an external brain system, just like in A Certain Magical Index.
Of course, the Undetectable Extension Charm would be essential. This wetware alchemy creation would likely be as bulky as the early computers of the Muggle world.
Since he lacked the wireless technology from A Certain Magical Index, he could only use a wired connection and keep it on his person.
For portability, he'd need some specialized spatial magic items.
This research was just as important to Roger as his ongoing work on human transfiguration and biological immortality.
Not only would it enhance his capabilities, but it would also be critical to his future path to eternal life.
Roger never believed he could walk the difficult path of immortality alone.
Outsourcing some of his immortality research to Hagrid and asking Harry if he was interested in studying immortality were all just part of his long-term strategy.
If one day, Roger's power became unrivaled—if he could single-handedly crush the entire world—
Then he would bring about an earth-shattering revolution without hesitation!
He would make every person a genius with extraordinary talent, vastly increase the world's resources, and give everyone the means and conditions to pursue truth. Then…
There would be no "then."
Just as Roger once told Minerva McGonagall—
"I only need to plant some ideas upstream in the timeline. When I harvest them downstream, everything will naturally fall into place."
He didn't need to take excessive action. He would simply let human civilization advance under the force of desire, while he silently reaped the fruits—shepherding civilization, harvesting it within the brilliant sea of stars.
Time was on the side of the immortal.
---
"Harry? Harry?"
"Are you okay?" Oliver Wood asked with concern as he stepped forward.
As the captain of Gryffindor's Quidditch team, he was extremely pleased with Harry Potter, the student brought in by Professor McGonagall.
He had never seen such a talented Seeker before.
Oliver was certain—so long as nothing went wrong with Harry, Gryffindor would definitely win this year's Quidditch Cup!
There was no other possibility!
The two Beaters and three Chasers on the team, having witnessed Harry's astonishing athletic ability, even suggested adjusting their old strategies and building a new system centered around him.
Everyone was eager and ready to seize the championship.
But then, an unexpected problem arose.
For the past two days, Harry seemed distracted during practice, his mind elsewhere. Just now, he had nearly fallen off his broom after failing to dodge a Bludger in time.
"I…"
Feeling the concern of those around him, Harry knew that as a teammate, he shouldn't bring his personal emotions onto the field.
But if emotions were that easy to control, the world wouldn't be what it was today.
"Sorry, I've been dealing with something. I'll adjust my mindset as soon as possible—I won't let it affect the November match." Harry apologized to his teammates.
At that moment, he realized he needed to change.
Since enrolling at Hogwarts, Harry hadn't done much.
He learned magic, played games with Ron, explored the magical castle of Hogwarts, and tried to learn more about his parents' past. He wanted to understand them better. And then, of course, there was Quidditch training.
The problem lay in his exploration of the castle.
In an abandoned classroom, he had discovered a mirror.
In that mirror, he saw… his father and mother.
Harry struggled to describe the feeling. It wasn't just an ordinary reflection. When he looked at them, it felt as though they were really there beside him. That warmth, that feeling of being loved, surged within him.
He was addicted to it.
Unable to pull himself away.
Pressing his hand against his shoulder—where a fresh bruise from the Bludger remained—Harry chose not to heal it. He let the pain remind him that something was wrong with his state of mind.
His team was still waiting for him.
For the first time in his life, Harry was trusted and relied upon—not because of some ridiculous "Chosen One" title, but purely because his teammates had faith in him.
There was no way he could betray that trust!
So…
"Roger, save me!"
"Hm?"
Roger calmly turned his gaze toward the door, which had just been knocked.
At this hour, all classes for the day had ended, and with Halloween just a few days away, most students were out enjoying themselves, preparing for the upcoming celebration.
But ever since Hermione's words enlightened him a few days ago, Roger had been completely focused on his human alchemy research. Even when he returned to his dormitory, he didn't stop.
Recognizing Harry's voice outside the door, Roger Virgil tapped his wand against his left arm, where dazzling blue light surged under his skin, as if some kind of monster was writhing beneath. He temporarily halted his human transmutation experiment.
Restoring his normal appearance, Roger opened the door.
The moment he stepped inside, Harry, as if afraid of changing his mind, hurriedly spilled everything he had been experiencing.
The moment Roger heard Harry say he saw his parents in the mirror, he immediately knew what was going on.
The Mirror of Erised…
Roger thought for a moment. He had some interest in that artifact.
"It's not a big deal. I'll go with you."