Wind Style: Rasengan and Water Style: Crashing Rapids—both shared the same characteristics: they were violent and required advanced nature transformation. When combined, they formed a spiraling water tornado capable of blocking Kakuzu's Searing Migraine.
Ren Uchiha's Water Style: Water Fang Blade and Wind Style: Vacuum Blade followed the same logic. The Water Fang Blade was a rapid water drill; the Vacuum Blade was a razor-sharp wind. Having already mastered Water nature transformation in the Land of Steam, all Ren lacked was the Wind equivalent.
Ren stared at the night sky where twelve wind spheres were streaking toward him. The wind howled, churning up rolling sand. The compressed blades within them shimmered with a spine-chilling light under the moon. If he couldn't handle this, he would spend the rest of his short life fruitlessly charging until his stamina gave out and he died.
If charging meant death and staying meant death, he had to gamble.
Ren stood his ground and took a deep breath, his Sharingan locked onto the falling wind spheres. He dispersed the fire on the Kusanagi sword and began weaving seals. As the final sign snapped into place, he thrust his chakra into the legendary blade.
A deep blue Water Fang Blade instantly spiraled around the sword, emitting a high-pitched, scalp-numbing screech. Next, threads of sharp wind rose from his left hand, weaving into the blade.
The Water Fang Blade visibly swelled, looking as though it would explode at any second. The fusion was agonizingly difficult. If not for the Sharingan's ability to observe the berserk chakra flow and Ren's expert proficiency in both techniques, he would have blown himself up on the spot.
"Just a little more..." Ren gritted his teeth, his arms trembling as veins bulged. The Kusanagi sword, usually weightless, now felt like it weighed a thousand tons. "Where is the hitch? Why won't they fuse?!"
As the wind spheres shrieked toward him, Ren looked up, his eyes wide. He let out a desperate roar:
"Screw it! Just spin! GIVE ME EVERYTHING!"
Ren thrust the nearly-exploding sword toward the sky. He stomped the earth and twisted the hilt, flooding it with chakra. He didn't care about the elegance of the fusion—he just forced them to move. Spin! Spin faster!
Water and wind tore at each other in the rotation, eventually converging into a single point of peak intensity.
"Ninjutsu: Hurricane Water Vortex Sword!"
A beam of blue light shot from the tip, piercing the sky. Around that line, a massive blue water tornado exploded outward like a blooming mandara flower. White wind blades and blue water currents spiraled violently around the central pillar. The brilliant blue-white light dyed the plateau like a strobe-lit dance floor.
The vortex slammed into the incoming wind spheres. Ren bellowed, his hands gripping the hilt as he used his whole body to swing the raging spiral. The "1+1>2" combination produced a power far beyond standard Ninjutsu. The vortex swallowed the twelve wind spheres, shredding them and absorbing their energy, growing even more violent.
Then, Ren's expression turned feral. His body tensed to the limit as he yanked the Kusanagi sword back and slammed the tail of the water vortex into the ground beneath his feet!
BOOM!
The impact pulverized the earth into dust. Using the massive recoil and thrust of the vortex, Ren was propelled into the sky like a rocket. The sword had become his thruster, shooting him a hundred meters into the air like a reverse meteor.
Ren had literally launched himself.
In a flash, the boy crossed fifty meters of distance, soaring directly over the heart of the Sand formation!
Below, the Sand ninjas stood dumbfounded. They looked up at the boy descending from the heavens, their scalps tingling with fear.
"What the hell is that?!"
"Too fast!"
"Damn it! How is he flying?!"
"Sir, he's moving too fast to aim!"
Amidst their shock, Ren dispersed the water vortex mid-air. His face was twisted in a savage grin as he roared:
"You guys had your fun shooting at me, didn't you?! NOW IT'S MY TURN!"
He raised the Kusanagi sword high. One arm burst into brilliant flames, shining like a miniature sun!
Fire Style: Chakra Mode. Zero-Tails: Dark Chakra Mode. Forbidden Jutsu: Physical Rebirth. Immortal Body. Everything activated at once.
Ren swung the blade downward toward the Sand formation. As he did, he exhaled a Wind Style: Super Vacuum Blade onto the burning steel, making the flames even more berserk. The blade erupted with a horrifying light.
Below, the Sand Commander's eyes widened. "Not good! He's doing that move again! Quick! Everyone use Super Scythe Weasel to blow him away!"
The Sand ninjas, terrified by the rising sun in the sky, scrambled to weave seals. However—
"HAHAHAHAHAHAHA!" Ren laughed maniacally from above. "Too late! And I am completely different from before!"
He aimed the roaring Kusanagi sword at the heart of the Sand camp, his chakra surging into a final, total output.
"TAKE THIS! GREAT SLAYING SWORD: FLAMING WIND DRAGON DANCE!"
In the next instant, fueled by the wind, the fire perfectly replicated the combo Kakuzu had once used: Searing Migraine and Pressure Damage. But unlike the slow build-up of the previous flaming sword, a lifelike fire dragon erupted from the Kusanagi blade instantly!
Wind for scales, Earth Grudge Fear threads for sinews, and Fire Style: Chakra Mode flames for bone!
The dragon's body swelled to nearly fifty meters in a heartbeat, coiling once in mid-air. Its eyes lit up like twin suns, looking down at the mortals below with cold indifference.
Then, it struck.
The dragon lunged, jaws open, diving straight for the ground. Below, the Sand ninjas stared up at the mythical beast. Their seal-weaving slowed to a crawl. In that moment, it was as if they could see the Sage of the Six Paths smiling and waving them toward the afterlife.