Killer B's Assault on Kakuzu
Killer B's deep, calm voice broke through the chaos: "Kid, you seem close to them already—this one's on you!" In a blink, he appeared behind Kakuzu, ready to strike. Yet Kakuzu's taijutsu was formidable. They engaged in a brutal hand‑to‑hand clash, but B's combined taijutsu and Eight‑Tails chakra swiftly overwhelmed him.
Sasuke Confronts Naruto
Sasuke drew his Chidori blade, his eyes shifting into a Tri‑Tomoe Sharingan. Naruto stood solemn, frowning: "Was all this avoidable?"
"Don't be naïve—Akatsuki isn't a joke," Yon and Yakumo shared a look and braced themselves.
Sasuke sneered: "Toh is in Akatsuki, too—if he showed up, would you still be so calm?"
Their attention snapped back as Sasuke vanished behind Naruto. With blinding speed, he swung the Chidori sword.
Naruto defends, B counters genjutsu
The clang of steel jolted Naruto awake. Sasuke's assault nearly threw B off-balance. Meanwhile, Yakumo prepared a genjutsu—but Naruto, anticipating it, struck Yakumo from behind, snapping him out of it. Groggy, Yakumo gasped: "Impossible… you reversed my illusion?"
Sasuke coldly explained: "Your genjutsu targets the five senses—by sealing my own, it cancels out your technique. I just reversed that rule."
Chidori, Susano'o, and Amaterasu unleashed.
Sasuke's Sharingan sharpened at Naruto and Yakumo; the other split himself into Shadow‑clones and entered Sage Mode.
Sasuke then summoned Chidori Sharp Spear, thrusting it toward Naruto. Evading in midair, Naruto formed multiple Shadow‑clones and gathered a massive Rasengan.
Sasuke finished his seals and roared: "Amaterasu!" Black flames appeared on Naruto's clothing. Air, rushing to his aid, ripped Naruto's coat off to save him, warning him, "That is the Black Flame Tsunade spoke of—the same as Toh and Itachi's!"
As Susono'o fully manifested, its arrows readied: Sasuke fired them, but not at Naruto or Air—he targeted Yakumo. The arrow shot so fast that Yakumo had no time to react. Only Killer B's tail shielded him at the last second.
Reinforcements arrive
Killer B barked, exasperated: "I almost had him—can't you deal with such things?"
Tenzo and Aoba, accompanied by ravens, sprang into action. Tenzo unleashed Wood‑Style Writhing Luck, wrapping the Susano'o in root and wood. Arrows of ravens swirled around.
Sasuke, undisturbed, transformed Susano'o to its full form, brandished a sword, cleaving through the roots. Then he roared, "Fire Style: Great Dragon Flame Jutsu!" A massive dragon of fire swept across, igniting the ravens.
Naruto countered with a Wind‑Style Rasengan‑Shuriken—a tremendous wind‑chakra blade of swirling power. The combined assault nearly cracked Sasuke's Susano'o to the bone!
A full-on battle ensues
Naruto, Yakumo, and B pushed forward in unison.
Sasuke's growled response: he emboldened Susano'o, summoned lightning, wielded the Chidori sword in a blitzing melee, and pushed their front lines back.
Then Naruto summoned: "Summoning Jutsu–Bunta and the Golden Toad Sword Lion!"
Air added the Heavenly Mantis summon.
Closing clash
Naruto warned: "Don't hurt him!"
Sasuke shot back: "Really? Just because you've Sage Mode doesn't mean you can hurt me!"
Then the final crescendo:
"Ultimate Destruction Claw!"
"Wind‑Style Gale Beast Wave Palm!"
"Cyclone Cutter!"
"Wind‑Style Rasengan‑Shuriken!"
"Toad Iron Cannonball!"
A gale-force blast shattered across the battlefield. Susano'o erected a massive shield, unleashing a storm of wind, sucking the battlefield into chaos.
B murmured: "This kid's stronger than Kakuzu ever was—he mastered the Mangekyō jutsu!"
Air added: "I'm not worried about genjutsu—my tailed‑beast chakra snaps me free. But… that Black Flame… even I can't stop it entirely."
Sasuke darted behind Naruto. In one merciless kick, he launched him into the air. Then he focused on Air, landing blow after blow. He leaned in: "You said you wanted to surpass me—well, you've had your chance."
Naruto, in Sage Mode, used raw taijutsu and Sage-enhanced speed to unleash a punch that sent Sasuke flying. As Sasuke rose, he noticed the new nature of Naruto's chakra… the power Toh had described.
But Sasuke's Chidori sword glowed and thrust into Kakuzu's final heart, striking him dead. Kakuzu stared at Sasuke in shock, unable to comprehend.