"Ahhh!" Harry Potter looked like he wanted to say something, but the pain was so intense that he couldn't speak. His face twisted in agony as he let out constant screams.
Roger could roughly guess what he wanted to say: "This magic starts off like this. It'll get better in a bit. As the saying goes, 'When the heavens assign a great task to someone, they must first endure hardship, toil their muscles and bones…'"
While comforting Harry, Roger cast a binding spell to keep him from thrashing around, then waved his wand and began his magical modifications on Harry's body.
Roger's Transfiguration-based path to immortality had two major obstacles at this stage.
First, his spellcasting scale was limited by his perception—he could only manipulate things at the cellular level.
Second, he needed a material within the body that could be controlled by his will and used for physical modifications.
His solution was simple. He had no clear approach to modifying body materials yet, but there was already something in the human body that responded to conscious control—neurons! The same neurons that the brain used to control limbs.
So, what if he could enhance and reshape the neurons themselves?
Humans already had partial control over their internal organs, glandular secretions, and other bodily functions. However, most of these processes were controlled by the subconscious rather than the conscious mind.
If he could modify his own nervous system to some degree, could he unlock more control over his body?
And if his control reached a certain level, could that help him overcome his perception limit?
Roger didn't know.
But as a line of thought, it was worth exploring.
Scientific progress was built on constant experimentation.
…Besides, sometimes people researching heart disease ended up discovering entirely unrelated breakthroughs.
By committing to constant testing, who knew? Maybe he'd unlock a key technology in some unexpected way.
Regardless of the unknowns ahead, taking action was always better than standing still. With his innate talent for experimentation, not filling his schedule with tests would be a waste.
After some dedicated research, Roger developed a prototype: Magical Neuron Reconstruction.
That was the short name. The full name was: A Transfiguration-based Technique for Nervous System Proliferation, Structural Optimization, and Functional Reconfiguration.
The technique was complex. If not for Roger's ability to foresee danger and brute-force his way through trial and error, he wouldn't have been able to develop it.
Results...
After several minutes of screaming, Harry's throat felt raw, but the pain finally began to subside.
His nerves still burned slightly, a mild stinging sensation lingering throughout his body, but compared to before, it felt like heaven.
Roger waited a moment, letting Harry recover from his dazed state. Once he could process speech again, Roger began explaining.
"My technique isn't mature yet, so I didn't make any deep modifications to you. I only slightly optimized your motor and muscular neural structures. I didn't touch your glands, organs, or anything else. Now, follow me—raise both hands."
Since this was just a simple, introductory modification, the process was quick and lacked the side effects Roger himself had suffered—such as heightened bodily sensitivity to the point where wearing clothes felt like torture.
Harry instinctively mimicked Roger's movement.
"1, 2, 3, 4, 5…" Roger extended his fingers one by one.
"5, 3, 1, 4, 2… Good. Now, let's speed things up."
The next moment, Roger started flashing different numbers with his fingers at a speed rivaling Itachi Uchiha's hand seals in Naruto.
Harry, shockingly, kept up perfectly, mirroring Roger's actions without a single mistake.
"Looks like your fingers are fine. Next, let's test full-body coordination."
Backflips, aerial triple kicks, one-handed handstands, two-finger handstands, jungle parkour, free solo climbing…
The two ran a circuit around the edge of the Forbidden Forest.
When Harry finally snapped back to reality, staring at his own hands, he was completely dumbfounded.
"That was… me?!"
Anyone who's ever done precision work with their hands and feet understands how terrifying perfect bodily control is.
To put it in familiar terms—if Harry became a craftsman now, he'd have the hand precision of a Level-8 machinist right from the start. He was basically a human CNC machine!
If he entered any small-ball sport, he could instantly master any technique just by watching once. As long as his stamina kept up, other competitors would be irrelevant.
If this were a wuxia world, Roger's spell had basically turned Harry into a martial arts prodigy.
"How's that? Pretty good, right?"
"This should also make using magic a lot easier for you." Roger smiled kindly.
Since Harry had helped him by outsourcing his backup immortality route to Hagrid, Roger wasn't the type to let those who aided him suffer losses.
From Roger's perspective, the biggest advantage of this modification wasn't making Harry an all-around athlete, but rather making his spellcasting significantly smoother.
"Magic?" Harry was confused.
"Yes, try it. You should be able to do this too."
As Roger spoke, the first word came out in a girl's voice, the second in an old man's, and the last in a deep, gruff tone.
Normally, wizards had to carefully wave their wands and correctly pronounce their incantations. A mispronounced syllable or an incorrect wand movement could result in anything from failed spells to explosions or even worse consequences.
But after Roger optimized Harry's nervous system, he now had perfect control over his limbs and even his vocal cords. He could probably win a singing competition or perform The Skilled Mimic flawlessly.
As for casting spells? His accuracy would be flawless.
Gold Galleons, Butterbeer, and Wizard's Chess as thank-you gifts? Roger found those too cheap. Only something like this was worthy of a seer's return gift!
By the time Roger and Harry finished their adaptation tests and explanations, they had just stepped out of the Forbidden Forest and returned to the heart of Hogwarts Castle.
"Harry, I'm heading back to my experiments. If you ever need help, just come find me." Roger patted Harry's still-slender shoulder with a friendly gesture.
Although Roger considered his favor repaid, he wasn't the type to be warm when he needed something and cold when he didn't. Since a relationship had been built, it made sense to maintain it.
After chatting for a bit more as they walked back to the school grounds, Roger waved goodbye and went back to his experiments.
During Harry's modification, he had gained new inspiration for his magical research.
"Neurons, self-awareness, thought speed, mental power… I wonder if this will work."
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