The Limitless Curse (Rewrite taking over the original story)

3rd Person POV:

The dark, dense forest stood eerily silent, except for the rhythmic sound of falling trees and faint muttering. Following the noise, we come across a boy with striking white hair, shirtless, standing amidst a scene of utter devastation. The ground was scorched, trees lay felled in all directions, and the air vibrated with residual energy.

In the middle of it all, Y/n stood, catching his breath. His intense crimson eyes glowed faintly in the dim light as he raised his hands into an intricate shape. His lips moved, uttering a word almost drowned by the crackle of residual energy.

As Y/n activated the technique, the surrounding area darkened, and the air grew dense with malice. A massive, blood-red shrine materialized above him, exuding an oppressive aura. The ground beneath his feet cracked and split, as though the earth itself cowered in fear.

The shrine's ominous energy expanded outward, stretching to a 100-meter radius. Within this space, an unparalleled force surged, cleaving everything in sight into hundreds of precise, clean cuts—trees, rocks, and even the ground itself. The resulting destruction left the forest unrecognizable, as if a god of war had unleashed his wrath upon the land.

Y/n's POV:

Y/n released the technique, the shrine vanishing into thin air as he stumbled slightly, wiping sweat from his brow.

Y/n: "Phew, that is one overpowered move, but damn, it's exhausting. Malevolent Shrine's precision is insane. Still..."

He looked at the carnage around him, smirking faintly.

Y/n: "Infinite Void would be fun to try, but it's useless without someone to trap in it. Unlike Sukuna's domain, it kinda needs... well, victims and I know for a fact that asshole 'god' didn't think this far ahead and add cursed spirits to this world along with me.

He began stretching to ease the fatigue but froze as a voice echoed from nowhere.

Anti-Spiral: "This 'asshole god' can hear you, you little shit."

Startled, Y/n's instincts kicked in, and he unintentionally released Reversal Red in the direction behind him. The blast of energy tore through the air, annihilating everything in its path. Trees disintegrated into ash, the ground was gouged out in an expanding wave, and—most notably—a distant mountain range was obliterated in seconds.

The sheer force of the attack caused the remaining debris to rain down, leaving behind a gaping void in the distance.

Y/n: "YOU CAN'T JUST SNEAK UP ON PEOPLE LIKE THAT!"

Anti-Spiral: "You just leveled a mountain range because I startled you. You're the problem, not me!"

Scene Change – Rias' Training Grounds:

At the same moment, Rias and her peerage stood outside her family's expansive vacation home, staring at a mountain range.

Rias: "Alright, Issei. Let's see that new attack of yours. Try it on those mountains over there."

Issei: "You got it, President—"

His declaration was cut short by the loud roar of destruction in the distance. Before anyone could process what was happening, the mountains in question exploded violently, sending shockwaves through the air. The resulting force knocked everyone off their feet, with Issei landing hard... directly on his most sensitive area.

Issei: "OWWWWWWWWWWW!"

His shrill cry echoed as he curled up in agony.

After several moments of groaning, Issei shakily stood up, clutching himself.

Issei: "Di-Did I do that?"

His cocky grin lasted only a second before Koneko shot him down.

Koneko: "No, you perverted idiot. You're nowhere near strong enough to do something like that."

Issei: "Why are you always so mean to me, Koneko?"

Koneko: "Because you're a filthy pervert."

While Issei continued whining, Akeno raised the question lingering in everyone's mind.

Akeno: "If Issei didn't cause that, who—or what—did?"

Scene Change – Back to Y/n:

Y/n stood, arms crossed, glaring into the void where the Anti-Spiral's voice had come from.

Anti-Spiral: "Do you even realize you just destroyed a mountain range?!"

Y/n: "It's YOUR fault for scaring me!"

The Anti-Spiral sighed audibly.

Anti-Spiral: "Anyway, to answer your earlier question, yes, I added cursed spirits to this world. But I made sure they only target the supernatural—devils, angels, fallen angels. Normal humans are safe."

Y/n's irritation faded slightly as he smirked.

Y/n: "That's actually smart. Guess you're not totally useless."

Anti-Spiral: "You're welcome, brat. Go find yourself a special-grade cursed spirit if you want to test Infinite Void."

The deity's tone softened slightly.

Anti-Spiral: "Anything else before I leave?"

Y/n hesitated, his expression uncharacteristically serious.

Y/n: "Yeah... How's my sister doing? Back in my old world?"

The Anti-Spiral chuckled, surprised by the question.

Anti-Spiral: "Didn't expect you to care about your old life."

Y/n: "What do you take me for? Of course I care, dumbass. Now quit stalling and tell me."

Anti-Spiral: "Fine, fine. She's doing well. Obviously, she was devastated by your... 'death,' but she's channeled that grief into something positive. She's working hard in school to become a doctor. She says it's so she can save lives, since she couldn't save yours. You should be proud."

Y/n's expression softened, a faint smile tugging at his lips.

Y/n: "Stubborn as ever, huh? That girl never quit once she set her mind to something. I just wish I could be there to see it."

Anti-Spiral: "She's doing great. Now, stop moping and use this second chance properly. Show these so-called 'superior beings' what humanity is truly capable of."

Y/n's grin returned, his crimson eyes glowing faintly.

Y/n: "Oh, don't worry. I will."

With a final smirk, the Anti-Spiral disappeared, leaving Y/n alone in the forest. The boy stood there for a moment, clenching his fists with renewed determination.

Y/n: "Time to make this world regret underestimating me."

The camera pans out, revealing the aftermath of his earlier devastation, the scorched earth serving as a testament to his growing power.

To Be Continued...