"Die, brat!!"
Hidan laughed wildly, swinging his scythe, ready to cut down Udōn and Moegi.
Just then, a shadow flashed by. Before Hidan could react, his arm was severed by something, and his scythe clattered to the ground.
"Ah! Damn it, which bastard did this?!" Hidan cursed, screaming in pain, though his expression didn't show much agony.
"Kazuki!"
Moegi and Udōn saw Kazuki and were overjoyed. Their bodies seemed to regain some strength as they quickly ran to hide behind him.
"What are you two doing here?" Kazuki asked.
"We were just playing, and then these two showed up and started killing everyone! A lot of people were slaughtered!"
"Yeah, Kazuki, you have to avenge everyone!"
Kazuki didn't look at the fallen bodies. Instead, he tossed the two kids toward Uzuki.
"Yugao, take them to a safe place."
"Got it. Be careful."
"Don't worry." Kazuki smiled reassuringly at Uzuki.
Hidan, though immortal, posed little threat unless he got blood. Kakuzu, on the other hand, had five hearts and thus five lives—unless destroyed entirely.
Perfect timing, Kazuki thought. He hadn't yet tested his Mangekyō Sharingan, and these two would make fine test subjects. But he only had a minute, so he had to finish the fight quickly.
Amaterasu!
Kazuki had no intention of talking to either of them. The moment his Mangekyō Sharingan activated, Amaterasu's black flames burst forth. His dōjutsu's power had increased a hundredfold, making his Amaterasu far more formidable!
First, he targeted Kakuzu, who had been standing at a distance, thinking he'd let Hidan test Kazuki's abilities. But he didn't expect the black flames to ignite on his body out of nowhere, catching him off guard.
"Damn it, Amaterasu? Are you Uchiha Itachi?!" he shouted, shocked.
Kakuzu quickly attempted to cut off his arm to escape the flames, but the fire intensified, devouring him entirely before he could react. His body, with its five hearts, began disintegrating. Though his heart could regenerate his body through Earth Grudge Fear, the enhanced Amaterasu left no chance for him to recover.
(T/N: The Earth Grudge Fear is a secret kinjutsu of Takigakure which transforms the user's body into something similar to that of a rag-doll, held together by hundreds of thick black threads.)
Kakuzu was annihilated in an instant.
"H-Hey, this has to be a joke, right?!" Hidan stammered, watching Kakuzu vanish before his eyes.
He knew he wasn't a match for Kazuki without Kakuzu's help and was already considering retreating. But it was too late. Kazuki had finished with Kakuzu and turned his attention to Hidan.
Amaterasu's flames enveloped Hidan, but Kazuki held back, curious about whether the immortal Hidan could survive his enhanced Amaterasu. However, disappointment soon followed. Hidan's body began to dissolve just like Kakuzu's. Not wanting to waste the flames, Kazuki extinguished them.
Kagutsuchi!
(T/N: Kagutsuchi is a technique which applies shape transformation to the black flames of Amaterasu, allowing the user to manipulate them at will.)
With the power of his enhanced Mangekyō Sharingan, Kazuki's control over Amaterasu surpassed even Sasuke's. He severed Hidan's limbs with a few swift strikes and called out to Karin:
"This one might still be useful. Find something to store him in and send him to Orochimaru when we're done here."
"Got it, Kazuki-kun!" Karin replied, quickly finding a wooden box and stuffing Hidan inside.
Without taking more than twenty seconds to deal with both Kakuzu and Hidan, Kazuki prepared to move on to the next target.
"Let's go, to the next location!"
The invaders were many—seemingly the entire Akatsuki had mobilized. Kazuki didn't care, he wasn't their leader. All he knew was that this was his chance, a chance to eliminate the hidden threats of Uchiha Obito and Zetsu. With them gone, the remaining enemies would be insignificant.
Soon, they arrived at a new location—a small alley in Konoha. This time, the enemy was more cautious, preferring to hide in the shadows and silently eliminate isolated ninja. Kazuki was surprised to find that the person lurking here was none other than the cold-hearted goddess of Akatsuki, Konan.
The moment Kazuki appeared, Konan noticed them and immediately activated her unique Paper Release, sending a barrage of paper toward him.
But Paper Release had a glaring weakness—it was no match for Fire Release. With just a glance, Kazuki's Amaterasu ignited the paper, burning it to ashes and forcing Konan to reveal herself.
"Black flames? Amaterasu? Are you Uchiha Itachi?"
"You guessed wrong," Kazuki chuckled, snapping his fingers. "As punishment, you won't be able to use paper ever again."
Konan frowned, realizing the gap between their strength. She didn't intend to engage in a prolonged battle and decided to retreat. But as soon as she tried to move, she found herself immobilized.
"Damn it, I'm under a genjutsu!"
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The fanfic is finished on p@treon/tambeerg