(Flames of the Black Sun)

The night sky above the ruins was cloudless, the stars twinkling faintly. Despite the calm atmosphere, the ground beneath was stained with blood and debris, a testament to the fierce battle that had just taken place. Gojo Satoru, the strongest sorcerer alive, was kneeling, clutching his neck as blood poured from the deep wound inflicted by Toji Fushiguro, the assassin feared by all.

Gojo, normally so confident and untouchable, now struggled to maintain consciousness. His Limitless technique had been bypassed by Toji's Inverted Spear of Heaven, a cursed tool capable of nullifying sorcery. He could feel his cursed energy faltering, his body growing weaker as his life ebbed away.

Toji, standing over him, sneered. His eyes gleamed with satisfaction, the thrill of having taken down a god-like sorcerer still coursing through his veins. "You sorcerers think you're invincible," Toji spat, wiping the blood from his weapon. "But you're all just flesh and bone in the end."

Gojo tried to move, but the strength in his limbs was fading fast. He blinked, trying to keep his vision clear as Toji turned, ready to leave now that his job was done. But before he could take a step, a gust of wind swept through the ruins, carrying with it an unmistakable sense of impending doom.

Itachi Uchiha stepped out from the shadows, his expression as cold and unreadable as ever. His Mangekyō Sharingan spun slowly in his eyes, taking in the scene before him—the fallen Gojo and the bloodied Toji.

"Toji Fushiguro," Itachi said calmly, his voice cutting through the tension like a blade. "I've seen enough."

Toji turned, eyeing Itachi with a mixture of curiosity and annoyance. "So, you're the outsider I've heard about." He raised his cursed spear, twirling it casually in his hand. "If you're here to protect him, you're too late."

Itachi's gaze remained steady as he walked toward the wounded Gojo. With a simple hand gesture, crows materialized in the air, swirling around Gojo's body, forming a protective barrier as they gently lifted him and set him to the side. Gojo blinked in confusion but managed a weak grin. "Heh... thought I was a goner there."

"Itachi, huh?" Toji said, his smirk widening. "I just killed the strongest sorcerer in this world. Do you really think you'll be any different?"

Itachi didn't respond immediately, his crimson eyes narrowing as they locked onto Toji. He knew what kind of fighter Toji was—a man who relied on his immense physical abilities and precise use of cursed tools to overwhelm even the most powerful sorcerers. But Itachi wasn't an ordinary fighter.

"You're skilled," Itachi said quietly. "But you're reckless."

Toji's smirk faded slightly, his grip on the spear tightening. "We'll see about that."

In a blur of movement, Toji launched himself at Itachi, his cursed spear aiming for Itachi's chest with lethal precision. Itachi, with the fluidity of a seasoned shinobi, dodged the strike effortlessly, his Sharingan reading every movement, predicting every attack.

Toji pressed on, his spear cutting through the air, striking with deadly speed. But no matter how fast or precise his attacks were, Itachi seemed to be one step ahead, evading each blow with minimal effort. The Sharingan's predictive ability was proving too much for Toji, but he wasn't ready to give up yet.

"You're not bad," Toji admitted, wiping sweat from his brow. "But this ends now."

Toji feinted with the spear, then in an instant, drew his hidden cursed blade, aiming for Itachi's throat in a surprise attack. But before the blade could even get close, Itachi's eyes shifted, and a dark, black flame ignited along the blade's edge.

Toji's eyes widened in shock as the black fire—Amaterasu—spread from his weapon to his hand, crawling up his arm with terrifying speed. The cursed flames burned hotter than anything Toji had ever experienced, consuming him inch by inch. He screamed in pain as the Amaterasu flames devoured his flesh, their heat so intense that no cursed energy could extinguish them.

"What… what is this?" Toji gasped, dropping his weapons as he tried to beat the flames away. But Amaterasu was relentless. Once ignited, the black fire would continue burning until its target was completely annihilated.

Itachi watched silently, his Mangekyō Sharingan glowing ominously as he controlled the flames with a mere thought. "These are the flames of Amaterasu," he said, his voice low. "Once they touch you, there is no escape."

Toji's body was engulfed in the black fire, his screams echoing through the ruins as the cursed flames consumed him. He stumbled, falling to his knees, his once-predatory eyes now wide with fear and agony. He had fought and killed countless sorcerers, but never had he encountered anything like this.

In his final moments, as the flames devoured the last of his strength, Toji locked eyes with Itachi, seeing no emotion in the man who had sealed his fate.

"Damn… you…" Toji rasped before the flames overtook him completely, reducing him to ash.

The night grew still once more. The only sound was the faint crackling of the Amaterasu flames as they slowly faded, leaving nothing behind but scorched earth where Toji Fushiguro had once stood.

Itachi let out a breath, his eyes slowly returning to their normal state as the power of his Mangekyō faded. He turned toward Gojo, who was still weak but alive, the protective barrier of crows fading away now that the threat was gone.

Gojo chuckled weakly, his voice rough. "Well… that was something. I don't usually need saving, but I won't complain this time."

Itachi walked over, his calm gaze scanning Gojo's injuries. "You'll survive."

Gojo grinned, even in his weakened state. "Yeah, thanks to you. Looks like I owe you one."

Itachi remained silent, his thoughts elsewhere. The world of jujutsu sorcery was filled with dangerous enemies, but few were as formidable as Toji Fushiguro. Even so, Itachi had dealt with him swiftly, as he always did with those who underestimated him.

As Gojo regained enough strength to stand, he looked at Itachi with a mix of gratitude and curiosity. "So… you took him down with that black fire of yours. Amaterasu, right? You're full of surprises, Itachi."

Itachi gave a small nod. "It's not a technique I use lightly. But someone like him… there was no other way."

Gojo shook his head, still amazed by what he had just witnessed. "Well, I'll make sure the higher-ups know what happened here. Toji Fushiguro is gone for good."

The night was quiet again, and the danger had passed, but Itachi's mind was already shifting to the future. More enemies would come. More battles lay ahead. But tonight, at least, one threat had been extinguished.

As the moonlight bathed the ruined battlefield, Itachi and Gojo stood side by side, knowing that the fight was far from over—but ready for whatever came next.