Disclaimer: First Chapter
Story Start!

No hero had ever seen Kurama throw a punch.

No civilian had ever seen Kurama attack a single person.

Kurama was the Top Villain, the Villain who nobody could picture without imagining him smiling as he teased heroes while stealing their clothes. Kurama was the most skilled villain the world had ever seen, using his Poison Quirk and a single touch to disable anyone who threw an attack at him all without having to ever throw a single attack himself. All of Japan knew of Kurama, the Kurama had had taken down the Top 10 Heroes all at the same time.

The Most Skilled Villain.
The Most Unpredictable Villain.
The Happiest Villain.
The Uncatchable Villain.
The Unstoppable Villain.

The Villain who always had a smile in his eyes.

'This... I'm... I'm shaking.' Toshinori, All Might himself, felt the same fear he felt when he came face to face with All for One the first time. He wasn't even standing, the sheer cold fury that radiated off the young man who had yet to take a single step since he had murdered two of the villains who had made him angry.

Kurama was the Top Villain, and he was angry.
Kurama was the Most Skilled Villain, and he was seeking blood.
Kurama was the Most Unpredictable Villain, and he going on the offense.
Kurama was the Happiest Villain, and he was in a cold fury.

Kurama was an Unstoppable, Uncatchable, Unpredictable Villain who had bested each and every hero he had ever come in contact with. Using only a single Quirk, Kurama had done what no other villain had ever managed to do and take down the Top 10 and All Might himself several times.

Kurama was a happy villain who didn't hurt anyone, so nobody really felt how terrifying he was.

The world was now seeing just how horrifying such a villain truly was.

Kurama with 1 Quirk became the Top Villain.

"You're next."

To the world, Kurama said those words before he rushed into action and went headlong into the enemy as they pointed their guns or got their Quirks ready.

"He's going after-"

"-All of you." Naruto stated as he cut off the woman who spoke by flicking some of his poison into the eye holes of the helmet she was wearing. He passed by her as she collapsed on the ground, twitching and convulsing in agony. By the time Naruto got in front of the next enemy as they all finished preparing their Quirks and weapons, it was already too late.

Naruto blasted the person in front of him in the chest, sending him flying across the stadium and into the wall with a large indent in the center of his torso.

Naruto's foot lightly touched the ground, before he jumped backwards as gunfire shot where he had been standing.

Mirko was shaking.

'This entire time... I've never fought him.' Mirko came to the realization as a strange thought occured to her.

She was terrified.

"The Kurama 9 is now the Kurama 7..."

Kurama could have killed her whenever he wanted to, at any point since she started to chase after him. Every single day she chased him, was a day that she could have very well died if her opponent had been the monster that was standing in front of her with his forearm covered in the blood of his enemies. His eyes held not even a speck of kindness in them that she was used to seeing, she saw nothing but a cold rage and the tears that he was shedding over the loss of the child's life.

She would never catch him.

'He's... I'll never attain his level... the gap between us is too large. I haven't gotten stronger in months, and he... he has so much potential left in him. His strength...' Mirko felt a despair deep inside of her when she realized, and she truly hated admitting this to herself, that she would never reach the peak that Naruto was walking up.

She couldn't even see the peak of his strength, while her own limits were so very clear to her now.

"Wait, we... we're so- RUN!" A member of the Villainous Kurama 7 started to run away, realizing that begging would do them no good now.

Naruto pointed a hand at the man.

His eyes were still cold.

-In A Hidden Location-

"You see... I realized something long ago. Because of their genetic immunity to my Quirk stealing their Quirks, I could never attain the Negating Chains that Kushina Uzumaki had. The Quirk that could negate and destroy any other Quirk... yet... if a child with that blood were to steal her Quirk, using a cloned copy of All for One... well that is another story."

-In the Arena-

A single golden chain.

Naruto's eyes were so focused, that he just did what felt right and thought about how he didn't want to allow even a single one of these people to escape. The urge to raise his arm felt natural to him, and just as natural as breathing, a long golden chain shot out of his palm towards the escaping member of the Kurama 7.

"Another Quirk... Even when he fought Orochimaru, he only showed 1 Quirk... our information was way off..." A seperate member of the Kurama 7 kicked the chain off course before it could skewer the escaping member of their team. "What!?"

The chain changed directions and wrapped around him.

*CRUNCH*

The chain squeezed him tightly, until all of his ribs shattered and inverted into his internal organs. The chain tossed him towards the still running teammate, knocking them to the ground. The chain stabbed into the ground as Naruto himself leaned back and glared death at the martial artist left alive of the Kurama 6.

"You won't dash the youthful flames-"

Naruto gently ran his finger underneath the helmet of the Kurama 6 member, and he collapsed on the ground as Naruto created another Rasengan. Just as the golden chain came out of the ground and skewered another member of the Kurama 5 from behind.

The Kurama 11 was now the Kurama 4.

This wasn't a fight.

'... Naruto... I've never seen his eyes so cold... This was one of his kids... of course he's going to go on a rampage. If somebody killed Naruto... I would do the same.' Nemuri thought as she watched her adoptive son slaughter and kill.

This was a slaughter, not a fight.

The Kurama 11 tried their best to put up a fight, but it would seem the Kurama 11 didn't know the difference between fighting against a Hero and a Villain. They had only ever fought heroes who they had strategies to beat, heroes who they had watched internet videos of Kurama himself beating.

Kurama, the Top Villain.

"To the world."

Kurama spoke.

The Kurama 4 froze in fear, complete fear as the stadium itself had a complete silence go over it.

The always happy villain was angry.

"This goes out to all of Japan I guess... my name is Kurama, this nations top villain. I love fun, and teasing heroes for the most part. There are very few things in this world that make me angry, truly angry like I am right now."

Kurama's voice was calm.

His voice was calm, but the fact that he was radiating with such a strong anger that several people in the audience were starting to throw up in their own mouths, was not something anyone could miss. The heroes in the audience who had personal encounters with Kurama felt the most fear, knowing the true monster that had spared their lives.

'He's... he's got the potential to be...' Nana Shimura, 7th user of One for All, was shaking in her boots as she thought of the darkest outcome. She knew Naruto personally for awhile now, and she knew this wasn't like him.

He was angry.

Yet, even in this blind rage that he was in, he was keeping a very calm mind that was letting him think so clearly in battle. He looked towards the cameras, and the sheer hatred in his eyes was the very first thing the cameras caught.

The country of Japan tasted fear.

The country of Japan looked into death's eyes.

Death stared back.

"I don't hate heroes, and I don't hate villains who kill heroes either. The second a hero or villain ever kills an innocent child, then you've made me your enemy. This Kurama 11, they've crossed the line, and for that they have paid with their lives." Naruto stated very clearly.

Naruto lifted his foot up off the ground, and showed 11 chains coming out of his foot and leading into the ground.

4 chains shot out of the ground behind each member of the now Kurama 4.

The chains pierced their hearts, and it pierced the hearts of the already dead members of what was now the Kurama 0. Their corpses were all lifted high into the air, and tossed onto the ground in front of Naruto's feet in a pile.

-In Another Location-

"He... he's a true hero." A man spoke as his red eyes gazed at the cellphone screen of a dying hero with a wide smile on his face. His black, wild hair, pulled and spiked back, his blades covered in slight blood. His long and bumped tongue licked his lips as he picked up the cellphone and watched the screen with far more interest than before. "... I knew Kurama was amazing, but he's more than I imagined. He's truly worthy of being a Hero, willing to make the world his enemy, to kill the villains that hurt the innocent."

This was the second person.

All Might was the first person, but this boy here, Kurama, was the second person he had ever deemed to be worthy of the title of a hero. This villain had more of the true heroes spirit for protecting who needed to be protected than any of the false heroes.

His power was amazing.

"A child is something that should be protected, cherished, and saved from harm. I can kill nearly anyone with the touch of my finger."

-Hidden Location-

"... Are you sure that you can control this boy? He's got All for One, and he's already got 2 powerful Quirks under his belt." Kurogiri spoke to the radio as he watched the television. He watched as Kurama stood on top of a pile of his enemies corpses. "No offense Master, but while you possess extreme power... this boy shows more promise with stolen Quirks than you yourself do." Kurogiri kept speaking with his voice showing concern.

"Yes, finally he's acting like a real villain... if only he would have done this to All Might. That would have been better than him killing some nobodies." Tomura stated with a twisted smile.

"I'm a Villain, and this is my declaration to all those who disobey my rules. Anyone who hurts the truly innocent in this world, will come face to face with me."

-With Naruto-

"... and Villains aren't like heroes... because we don't have to show any mercy. The second I hear a hero or villain kills a child... this pile of bodies grows larger."

A hand touched Naruto's leg.

"Please... please... tell me all my suffering inside of Orochimaru... please tell me... it meant something."

"Your suffering never gives you the right to do what you did, so your suffering meant nothing." Naruto looked down, and saw one of the barely alive bodies was less dead than he thought. Naruto stepped on his head.

*Crunch*

His neck snapped.

"I've now killed 12 people, and this number better not grow any larger, or else."

Thus marked the day that Kurama became something more to Heroes and Villains alike.

A deterrent.

Chapter End!
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A villain like Naruto isn't at his most dangerous when he's in a blind rage.
A villain like Naruto is at his most dangerous when he's in a calm fury.