Revenge with the Power of the Final Boss

"The odds of victory are uncertain." I immediately understood the meaning behind those words.
'So there is a chance of winning, after all.'

She said it would take me 40 years to adapt to the power, but before that, even if I were to fight The Fox That Devours the World, it's not that victory was impossible.
"Didn't you say it would take me 40 years to accept this power? How is it that I can fight The Fox That Devours the World before the world is destroyed?"
"You will just have to bear the price."

Ramisa responded calmly to my question.
"Price?"
"Yes. To settle the power quickly, you must bear the corresponding cost. What is it that you desire?"

"To save the world and take revenge."
At this moment, these were the two things I most wanted.
There might be more I wanted later, but for now, these two could represent my desires.

"Revenge, huh. Well, there is a way. If you keep the circumstances of your revenge constantly in mind, vividly recalling the events, I think you could adapt within five years."
"Five years?"
Five years seemed like a feasible time frame. Given that I was currently 10 years old, even with five years passing, I would only be 15.

"Time here and in the world I was born into is the same, right?"
I asked again, just to be sure, and Ramisa nodded.
"Yes. The time flows the same in both places."

"Alright. So if I return, it would be about five years. That’s not bad."
Five years didn’t seem so bad. Ten years might be too long, but five years would give me plenty of opportunities.
"I see."

"Yeah. But, is it alright for you to explain all this in detail?"
I was genuinely curious. She didn’t want me to clash with The Fox That Devours the World, yet she was still giving me all the information.
"Since I’ve decided to consider you as an ally, I’m simply being honest and providing all the details."
Though she spoke in a blunt tone, I nodded in response to her words.

"I see."
Ramisa, despite her stunning beauty with black hair and golden eyes, strangely seemed quite simple-minded at times. As I looked at her expressionless face, I thought about her nature.
'Completely indifferent to humans. Though her nature isn’t inherently bad, this is how she has consumed worlds.'

Surprisingly, Ramisa’s true nature wasn’t evil. Once she acknowledged someone as an equal, she would converse with them respectfully and sincerely. She was diligent and considerate.
However, she was an outsider. Her essence of seeing most humans as worthless hadn’t changed, and I was the only one she treated as special.
'She fears Yoo-cheon, but I guess she expects to be protected through me.'

Thinking about her opposition to me fighting The Fox That Devours the World, I began to doubt whether she would really grant me the power I sought.
"What will you do if I insist that I must stop The Fox That Devours the World?"
"If that happens, I will try to persuade you again."

"What if I still refuse?"
"Then I’ll try to request it again. But if you continuously refuse, I’ll have no choice but to respect your opinion and follow it."
I was surprised at how readily she would yield to me.

"Is that alright?"
"What else can I do? Without your help, I cannot proceed. And you did say you’d bear the price."
When Ramisa mentioned the price I had agreed to bear, I realized what she was referring to.

"If I can’t endure the pain… then I would have no choice but to give up and choose to spend 40 years here. But if I can withstand it… then it means my resolve is strong enough, and you won’t be able to stop me."
In other words, she still wanted to see my resolve. Perhaps, she thought there was a high chance I wouldn’t be able to endure the pain.
"Then there’s no need to drag this out. Start right now."

"Now?"
"Yes. I need to get stronger as soon as possible."
"...Understood. But you must be careful, as this is the price you are paying. If you abandon it, the power you’ve gained will disappear."

"Really?"
"Yes. You will need to endure the price for at least 15 years for the power to settle within you. Until then, you cannot erase the pain through methods like forgetting."
In other words, if I gave up halfway, all the power I had gained would be lost.

"Understood. I’m ready, so start."
"Alright."
As soon as Ramisa finished speaking, I immediately felt the change happening inside me.

The time when Baek Hyung-won and Kim Yoo-jung had discriminated against me felt as vivid as if it had just happened. Similarly, the moment when Baek Hyung-won and Kim Yoo-jung sold me to the villain So Kang-seok felt like it was happening right then.
Soon, a surge of emotions filled me—cursing my parents who sold me while I was tortured by the villains. The pain I endured in those moments felt as fresh as if it was happening now.
Anger, hatred, resentment, and pain.

Everything felt so vivid, gnawing away at my mind quickly.
"Ugh!"
My thirst for revenge against Baek Hyung-won and Kim Yoo-jung intensified. The resentment I held for the villains who tortured me under the guise of experiments and then threw me into the rift also surged.

'I won't forgive them!'
My vengeance, boiling over, caused me to grit my teeth. It was terribly painful to continuously feel all this so vividly, but at the same time, it became a stimulus.
My desire for revenge only grew firmer and stronger.

Right now, my state… was just solidifying my resolve to achieve this vengeance.
That was what I decided. Otherwise, enduring all this would be unbearable.
"......"

After a brief silence, Ramisa asked me.
"How do you feel right now?"
"Revenge... I can only think about making my revenge succeed."

Any normal person would have gone insane by now. However, having already experienced hell and filled with the desire for vengeance, I didn’t go mad.
I couldn’t afford to go mad after everything I had suffered.
And my body, continuously nourished by the magic of the rift, kept me in top condition, allowing me to clearly feel everything as I seriously thought about and planned how to carry out my revenge.

Simply killing them all with strength wouldn’t be satisfying. I needed to figure out how to show them hell.
Some might look at me now and think I’m going mad in extreme pain, but I wasn’t.
I had simply resolved to ensure my revenge and reaffirmed my determination.

Probably...
"I guess there’s no other way. Then, for the next five years, I’ll depend on you. After that... I’ll still need your help."
And so, Ramisa and I began living together, now certain that I wouldn’t give up.

Her immense power flowed into my body, and soon, she transformed from the beautiful woman into the black serpent, wrapping herself around my neck like a scarf.
Seo-jun, if you want to give up, you can always tell me.
"There won’t be such a thing, Ramisa."
Smiling, I gently stroked her body as she offered me the option of giving up.

"I won’t run away. For the sake of revenge… I can endure this. Oh, and I have to save the world too."
The more I recalled the pain I had endured, the more I questioned whether the world was worth saving.
But thinking that I couldn’t become like Baek Hyung-won and Kim Yoo-jung, I shook off the temptation and solidified my thoughts.

I thought about the countless people caught in the collapsing world, about how saving them would prove that I was different from Baek Hyung-won and Kim Yoo-jung.
'Revenge, revenge, revenge…'
But in the end, my thoughts again turned toward revenge.

Over the next five years, I had to live every day in intense pain and anger. But I managed to overcome it all and successfully settled Ramisa’s power within my body.
Now, considering the price, if I endured for just 10 more years… this power would be fully mine.
'But I can't find Yoo-cheon yet.'

I didn’t know where Seo-mun Yoo-cheon was, and even if I tried to cross dimensions, The Fox That Devours the World was more likely to find me before I could find him.
Until I became stronger, I had to stay hidden from The Fox That Devours the World.
'I should start moving soon.'

Then, as I stepped outside, I met Seomun Ye-jin, who would become my wife, for the first time.
It was truly a miraculous moment.