Hogwarts: Wizards of Eternity

The Second Brain in Hermione's hands was a failed prototype of the second-generation model that Roger was developing after completing the first-generation model he was currently using.

Although it was called a failed prototype, many of its functions were actually quite powerful. Its failure was simply because Roger realized there was a problem with his research direction, so it became a discarded plan.

It was similar to the previous Magical Brain modification.

It wasn't that it couldn't be done, but Roger had a better option.

"Like this, is it okay?"

Following Roger's instructions, Hermione slightly pulled open the collar of her wizarding robe and placed the circular sphere at the junction of her collarbone and sternum, ensuring it was tightly pressed against her skin.

The cool touch made Hermione's skin tighten.

"Yes, like that." As he spoke, Roger took out his wand and gently tapped it.

In an instant, the sphere seemed to transform into a phantom, half-sinking beneath her skin and half-exposed, looking a bit like… an Ultraman's color timer?

[Second Brain - Activate]

A phantom voice suddenly echoed in Hermione's mind.

"During the activation process of the Second Brain, it will use the power of magic to reconstruct the internal structure of your body."

"Learning from my and Harry's previous experiences, I've constructed a spell that can influence pain perception and loaded it inside, so you shouldn't feel too much pain during this process."

"Furthermore, this reconstruction is purely a magical overlay effect, similar to Transfiguration, and doesn't involve any fundamental changes. Therefore, as long as the Second Brain is removed, the magic will be canceled, and your body will return to its original state. So, there's no need to worry about the current discomfort."

"…But, I still feel really awful," Hermione's face gradually turned pale, but not because of pain, but because of dizziness.

Her current feeling was like having a fever of 39.5° as a child, where everything she looked at was spinning.

"That's normal, after all, it's making some perceptual adjustments. The feeling you have now is already optimized by me; it was even more terrifying before optimization."

"…" Hermione was silent.

But it wasn't that she didn't want to speak, but that she was too uncomfortable to speak.

After about three minutes, everything finally ended.

[Second Brain - Loading Complete]

The phantom voice echoed in her mind for the second time, and all discomfort gradually faded. In that instant, she felt that the world before her had changed!

"What… what color is this?" Opening her eyes, everything before her became unfamiliar.

Not only the light, but even the surrounding wind felt different. In less than half a second, detailed data such as humidity, wind force, and temperature appeared in her mind.

She could even visually estimate the specific length, width, area, volume, and other physical properties of all objects around her.

"Whether it's human tricolor vision or mantis shrimp's sixteen-color vision, they are actually limited. I referenced the octopus's perception method to construct 'true color' vision for the Second Brain users… Don't worry about these minor sensory functions; try thinking about 'acceleration'."

Within the few seconds that Roger spoke, Hermione had already mentally calculated the number of hairs on his head. With a thought, the world before her changed again.

Roger's voice was elongated, and Harry and Neville's movements became comical.

Everything around seemed to be slowed down by a factor of three.

But she was not affected by the distortion of sound and movement, and could still understand what Roger was saying. The processing power of her brain was enough for Hermione to comprehend everything.

"You feel it, right? Everything has slowed down. However, this is only achieved by stimulating your mind to overclock, and it's not a true, constant enhancement of processing power. It's fine to use it for a dozen minutes during combat, but exceeding the usage limit will cause you great harm."

"In addition to mental overclocking, it also has absolute memory, tactical analysis, spellcasting assistance, self-manipulation assistance, and learning planning functions."

As he spoke, Roger looked at Harry and Neville beside him: "It might be difficult for you to have a real experience just by talking about it. Harry, why don't you two spar with Hermione for a bit?"

Hearing Roger say this, Harry also became interested.

He then drew his wand.

A faint smile also appeared on the corner of Hermione's lips. Speaking of which, she hadn't had a proper duel with other wizards yet.

Only Neville, raising his finger and pointing at his face, looked somewhat dazed: "Me fight Hermione? Really?"

Neville and Hermione had a significant gap in their magical studies.

Was this a game he was qualified to be in?

"It's okay, I'm here," Harry patted Neville on the back.

After speaking, Harry took a step forward.

Following the etiquette of wizarding duels, the three stood on either side and bowed.

Then, Expelliarmus!

A swift spell flew from Harry's wand.

Watching the Disarming Charm coming towards her, Hermione didn't panic. Acting preemptively, she raised her hand and cast a silent Protego.

Protego is a spell that can create a magical barrier. Strictly speaking, it doesn't possess the defensive power of iron armor, but rather applies a layer of 'magical isolation'.

This was an advanced spell that high-year students about to graduate from Hogwarts would encounter. Hermione had only heard of it before, but had never studied it.

But this time…

She discovered that as long as she thought about it, she could release the spell she needed with the assistance of the Second Brain.

[Assisted Spellcasting]

This assistance function relies on the data that Roger has instilled in it. In other words, Hermione cannot use magic that Roger hasn't input in this way.

Protego deflected the Disarming Charm, and Hermione immediately waved her wand.

'Tarantallegra!'

This was a minor jinx, belonging to the curse magic system, which would make people dance uncontrollably after being hit.

Because it belonged to the category of curses, it required a small amount of malice when casting it.

Originally, Hermione was not good at this emotional spellcasting system, but after the Second Brain fine-tuned her internal nerves and hormones, allowing her to mobilize her emotions more easily, this was no longer a problem.

[Self-Manipulation Assistance]

Not only emotions, but when needed, it could also be used to accelerate body healing and change body shape, equivalent to half a Metamorphmagus.

Of course, this assistance was not omnipotent. High-end magic in areas such as the Killing Curse and Love Magic required intense emotions from the soul.

A red light flashed, and Hermione's jinx was intercepted by Harry's Disarming Charm halfway.

At this moment, Harry, after undergoing a transformation, had his mental strength increasing daily, and his magical abilities had also greatly improved under Roger's guidance.

One spell, multiple uses.

Just like how the Levitation Charm has the potential for microscopic matter manipulation, Protego can build a wall of the heart between two arguing wizards.

Magic is not a system that converts magic power into 'welding energy' and releases it.

The mind is the foundation of magic. Theoretically, most spells, as long as the caster is strong enough, have the ability to subvert the world.

Don't be framed by the appearance of spells.

The essence of the Disarming Charm is 'magic that eliminates the opponent's ability to attack'.

Aren't spells also a weapon that can harm oneself? Just like bullets.

After a brief exchange, Hermione and Harry stared at each other with solemn expressions.

Searching for each other's flaws.

And at this moment.

"Petrificus Totalus!" Neville's voice suddenly rang out from behind Harry!