The Dragon lashed his tail in a sweeping strike at Sasuke and Naruto. Sasuke drew the two longswords at Susanoo's waist and crossed them to slash at the oncoming tail, while Naruto's Nine-Tails form clenched a fist and punched it. A deafening metallic clang rang out.
The moment Susanoo's longswords struck the Dragon's tail, Sasuke felt as though he had hit an incredibly hard piece of metal rather than a living creature's tail. Naruto felt the same when his fist connected, as though he had punched a steel plate.
The Dragon's immense strength sent Naruto and Sasuke flying. Once they steadied themselves, Naruto said, "Sasuke, this isn't working. His defenses are just too tough. We can't break through them at all, but he can hurt us."
That last exchange had already shown Sasuke that breaking through the Dragon's defenses would not be easy. "Then let's try hitting harder," he said. "No matter how tough his defenses are, they have to have a limit. I refuse to believe we can't break through."
Naruto nodded. "All right, let's try again. If it still doesn't work, we'll try a combined attack." His eyes transformed into the Mangekyō Sharingan, and he activated Susanoo. Its armor covered the Nine-Tails' entire body. After forming a hand seal, Naruto released his Adamantine Sealing Chains. They coiled around the arms of his Majestic Attire: Susanoo, serving as its weapons.
Sasuke entered Sage Mode as well, markings appearing around his eyes. After infusing Susanoo with Senjutsu, he formed a hand seal and said, "I'm not finished yet. Forbidden technique: Eight Branches Technique!" The legendary demon, the Eight-Headed Serpent, emerged beneath his feet. Sasuke formed another seal, and the serpent's eight heads grew from Susanoo's spine, as though Susanoo itself had sprouted eight heads from its back. Eight tails emerged