The Reincarnated Person Became a Professor at the Academy

It was the act of overlaying his strongest self from another timeline.

Han Seojin became the Demon King of Eternity through this process.

He forced his powers to surge, combining the strength of his most powerful self from another timeline with the powers of others.

The result of that process was the Demon King of Eternity.

That’s why he was eternal.

If there existed an entity with sufficient potential.

Piercing through even the slightest possibility.

He summoned the most outstanding version of himself.

Originally, it probably wasn’t intended to be like this.

To speak of eternity with this would be too lofty for its name.

If we were to speculate, what it originally desired was:

‘Summoning all versions of oneself from other timelines,’

And merging them.

It would be that kind of thing.

While researching Eternity, Han Seojin thought to himself,

This power was extremely dangerous.

While wielding the power of time, it also harnessed the strength of other forces.

And all of his being was ‘fixed’ in a form summoned for eternity.

‘You could think of it as a trump card.’

However, this could only be used once.

This was because it solidified everything that made up Han Seojin.

Even his potential.

‘Is there really a need to use this?’

That was his first thought upon realizing it.

This didn’t suit him.

In the most critical moment, using this would indeed become a trump card.

But he had two such trump cards:

The Master of the Purple Magic Tower.

And the Heaven-Surrendering Martial Emperor.

His own Manifestation that can summon them.

Mirror of Reality and Illusion.

An extreme mental construct invested entirely in storage and restoration.

This one was permanently consumptive.

It could not be restored again. That’s its purpose, after all.

‘I’m a reincarnator, after all.’

Rather, this was better.

And this wasn’t even the full extent of its value.

The moment he transcended and escaped the laws of the stars.

His Manifestation started evolving.

It was designed that way.

Therefore, he could now use it twice.

A means to protect his life twice before reaching transcendence.

Being fixed offered no merit to him.

Someday, he was confident he would become the strongest.

From now, just two more years and he could surely defeat the Heaven-Surrendering Martial Emperor.

So, he decided not to use it.

But then a thought crossed his mind.

What if.

The power of his past lives that he summoned, due to the time limitation, fell short?

In that case, wouldn’t it be possible to overlay it?

Such thoughts came to mind.

And with that thought, he created the current situation.

And.

[The God of Magic is being overlaid.]
「Interesting.」

The man spoke as such.

Han Seojin, the person who was cast upon him.

「Quite interesting. The potential for growth is this significant despite being a mere lower law of the universe? That status window seems quite useful.」

He could see from a bit of a distance.

Long, white hair flowing down.

Deep purple eyes.

The appearance was similar to Han Seojin but different.

He felt like something beyond human.

No, he had felt that even during his earlier days.

But now it was somewhat different.

Realm.

It was the achievement that an existence accumulated.

But that is different.

It evoked the presence of a god.

Demon God.

That existence was surrounded by demonic energy.

It felt like all the demonic energy in the universe was enveloping him.

Just looking at the being made one feel insignificant.

The entity confronting him.

That being was the same.

It was a god.

It surrounded itself with such great magic. He could tell because he had dedicated his life to dark magic.

It was a being draped in magic.

The God of Magic.

A being that would not seem out of place with such a title.

And it appeared before him.

「It’s been a while, Earth. The universe was quite vast and boring.」

He mentioned the universe, yet his expression remained calm.

The Demon King’s servant, the Insect Dragon King.

And the being that opposed the Demon God.

It was on par with them.

Having seen both, he was certain.

“You, you are.”

「Oh, did you notice? For someone of your caliber, your eyes are surprisingly useful.」

Useful.

It was a genuine statement.

If this person pledged loyalty to him, he might even grant him an important position.

In other words.

‘That’s all it amounts to.’

Yes, it’s just that level of existence.

He was someone who had built a great empire, creating beings similar to the Demon King.

A force that opposed both the Demon God and the hidden existence who granted him power.

That was the force he had built.

‘Shall I move?’

Gradually, the restraints on him were strengthening.

Han Seojin, the God of Magic, moved.

He wasn’t sure what he did.

But he could understand.

The being that summoned him was a form of himself that had died at some sort of crossroads.

And it had called him with some sort of power.

‘In that case, I should respond to its request.’

He saw something quite interesting.

Something called a system.

It piqued his interest.

At this point, he didn’t need such a thing.

But the citizens of the empire were different. They could use this as an opportunity to rise higher.

Han Seojin, the God of Magic, looked ahead.

「It doesn’t matter who you are.」

He decided what to do.

His past. Or rather, himself at a crossroads.

He decided to help him.

It showed him something quite interesting.

In that case, helping would be the right thing to do.

「Consider it an honor.」

This magic was far too excessive for you.

The Insect Dragon King moved.

Flap.

His blue wings expanded. They spanned several kilometers in an instant.

“Do you think I will die here?!”

A life-or-death battle with Han Seojin.

This was a different matter.

He had betrayed the Demon God.

Even so, the being who gave him the revelation would save him.

He possessed that much power.

But he must not die to that thing.

The Demon God.

And the being who gave him power.

He boasted power equivalent to theirs.

「Excessive power.」

It was beyond his measure.

Another being would just be swept away by the nature of the power.

He didn’t expect it to be the same for himself.

‘It seems there’s a way out.’

But it appeared extremely dangerous.

If he made a mistake, the aftershock from killing that being could severely impact the planet Earth.

So it was right to end it here.

Snap.

Han Seojin snapped his fingers.

A small sphere appeared.

A translucent sphere.

As soon as the Insect Dragon King saw it, he felt an overwhelming impulse.

‘Death.’

Death was certain.

This being, shrouded in magic, only had to decide how to kill him.

It was that kind of issue.

The confrontation between him and this being.

It was no different than an adult deciding how to crush an ant.

「Let’s end this.」

The man’s voice echoed.

The sphere grew larger.

It trapped his body.

Resistance?

He could do no such thing.

All his movements were restrained.

He was the Demon King.

And simultaneously, an apostle who received revelations.

However, the magic within his body, the blue power, the force of creation.

He couldn’t use any of them.

It was like being thrown into the sea with nothing but his bare body, an overwhelming sense of despair.

Creak.

His body floated.

From within, an immense power surged.

Each one a force that devoured his own body.

‘This is.’

The Insect Dragon King realized that this magic was something tremendous.

And at the same time, he realized one more thing.

This magic was not meant to kill him.

It was to show someone else.

Not him.

「Watch closely.」

As if to confirm those words, Han Seojin said with a smile.

「Do not be bound by creation, time, or space.」

A spine-chilling magical force was felt.

Countless lights of various colors within the circle.

「Punishment.」

“This is.”

The Insect Dragon King shuddered.

The being before him was similar to the one who had bestowed power upon him and the Demon God.

He knew that much in his mind.

But as the Demon King, as an apostle, he felt differently.

The sense of a dark mage was telling him about the situation he was in.

“This can’t be real.”

He murmured in a dazed voice.

While learning magic, he had never imagined such a sight.

A discipline that changed the laws of nature to exert the power of magnitude.

When you went out into space, you coil;d manipulate the laws of the universe.

That’s why it had clear limitations.

He could not resist the Demon God, nor could he resist the being with a blue light.

He certainly thought so.

The magic manifested by Han Seojin, the God of Magic.

It was not inferior to either of them.

“Punishment.”

ーーWorld.

Energy of the stars.

They were condensed into their respective attributes.

This sphere was merely implemented to sever the connection with the outside.

The mana circulating within this sphere.

That power.

‘Creation of the universe…’

Flash! Flash! Flash!

Countless lights were aimed at him.

The Insect Dragon King let out a hollow laugh.

No matter how much he struggled, he couldn’t evade this. He couldn’t block it.

He could only die helplessly.

This was that kind of power.

Flash!

Lights of various colors sparkled.

Boom!

One of the lights pierced through his body.

With that, his entire lower half was blown away.

‘Why…!!’

He couldn’t even make a sound with his mouth.

The immense pain that engulfed his body. It felt as if his soul itself was being torn apart.

It didn’t end there.

His magical power was being completely drained. He couldn’t even regenerate.

Despite being hit just once!

He couldn’t escape.

Since he had been trapped in the sphere, all his movements were completely sealed.

He couldn’t even move a muscle or an eyebrow. All he could do was move his mouth slightly.

‘Ah, ah…’

Han Seojin did not look at him.

It was as if he were showing how to deal with a passing ant.

He yawned leisurely and turned around.

And immediately after,

Thousands, tens of thousands of lights began to pour down from the sky.

「Woah.」

The God of Magic landed lightly on the ground.

The surrounding people were still staring at him with blank expressions.

“You are…”

「Ho, are you the one who created the Brilliant Blazing Fire and Glacial Heavenly Moon? You don’t seem as smart as you look.」

“…”

「Fate has met destiny. Wow, I thought you were that person, but is it a different fate?」

“What are you talking about?”

「A troublesome story.」

Han Seojin smiled faintly and turned around.

‘As expected, that woman isn’t here.’

A memory that had now become faint.

He recalled the woman from the wealthy family he had liked during his first life.

As expected, she didn’t exist here.

Rustle.

“Wh-what is this?”

“Master?!”

The body crumbled to dust and scattered.

The time of eternity, which Han Seojin had used, had ended.

A sign that even the kaleidoscopic Manifestation had concluded.

Eternal Moment had ended. Though fixed, it forcibly restrained the God of Magic.

Although Han Seojin had allowed the God of Magic to dwell within him, the limit was clear.

“Is this a side effect? So, until now…”

“I haven’t learned anything yet.”

“That’s just ridiculous.”

Han Seojin laughed lightly.

He turned his body.

Not because he didn’t want to show tears to his students.

That’s not the reason.

‘It’s not like I’m going to die anyway.’

The burden was heavy.

Eternity might not be usable for a while.

But there was a gain.

His Manifestation applied to Eternity.

That was an enormous gain.

‘Wait, does that mean I’m the strongest in my first life?’

If he had to guess by the feeling, it seemed so. The third life probably ended in nothingness.

His first life was…

‘Well, there’s something more important right now.’

Han Seojin looked at the corpse.

Insect Dragon King.

His body had been neatly dismantled.

As if to say, this is something you’ll need, it was meticulously done.

‘As expected of me.’

Gotta collect the byproducts.

Yes, absolutely.

He drew a space with Severance around the Insect Dragon King’s corpse, making it like a subspace, and put it there.

He collected the additional rewards.

“Hey, Yoo Eunchae.”

“M-Master! If you die… eek!!”

He smacked her head when she tried to hug him.

“Hey, what do you think you’re doing at the last moment?”

“I’m not dying. I’m just going to take a short rest due to the aftereffects, so make sure you tidy up.”

“Uh, you’re not dying, right?”

“Why would I?”

He let out a hollow laugh at the absurd question.

The backlash was coming slowly.

He thought he could endure it with this body.

‘Is it because I used Eternity?’

He really felt like he was going to die…

Thud.

And so, Han Seojin collapsed.