After the massive clash, the arena was filled with smoke and debris. Naruto and Goku were exhausted, but still standing. Their fusion had shown incredible power, but Void's presence still loomed.
Suddenly, a figure appeared from the darkness. Naruto's eyes widened.
"Sasuke…?" he whispered.
But this Sasuke was different. His Sharingan glowed red with a strange aura. The cloak he wore was black with silver symbols — not the usual Uchiha markings.
Void's voice echoed:
"Ah… my hidden piece. He has been waiting, watching, manipulating from the shadows. He is your betrayer, Naruto."
Naruto stepped back, confused. "Betrayer? Sasuke… why?"
Sasuke's eyes were cold. "I was chosen by Void. He showed me the truth… the truth that your world can never survive if you don't surrender your power."
Goku frowned. "What? He's helping that guy?!"
Sasuke ignored Goku. His Sharingan flashed, and in one swift movement, he blocked Naruto's Rasengan.
"You can't stop me, Naruto. Your power will belong to Void, and your world will crumble."
Naruto's heart sank. He turned to Goku. "Goku… he's… he's on Void's side."
Goku clenched his fists. "No way. We're not letting him win. Not you, not Naruto, not your village!"
Sasuke smirked. "Try me."
Suddenly, multiple shadow clones appeared — but these were Void's shadows. They surrounded Naruto and Goku, attacking from all directions.
The Fusion tried to strike them down, but more kept coming. Void's voice echoed from the shadows:
"Let fear guide you… let betrayal weaken you… then take your souls."
Naruto dodged a shadow blade and shouted: "We can't fall for this! Even if he betrays us, we fight!"
Goku's aura exploded brighter. "Exactly! No one can stop heroes who fight for others!"
The arena trembled as the Fusion's energy clashed with the shadow army.
But suddenly, Void appeared behind them, smiling cruelly. "The stage is ready… now you must pay the price."
Naruto and Goku realized: this was not just a fight — this was a trap.
Void had manipulated everything — the arena, the fusion, the betrayal — all to test their limits.
Naruto gritted his teeth. "Then we'll break it… together!"
Goku nodded. "Time to go all out — even against our own friend."
Sasuke's eyes flashed again. "You can't stop me… or him."
A single thought ran through Naruto's mind:
This battle is no longer just for power… it's for life, for trust, for everything we love.
And above, Void's laughter grew louder.
The final test was coming… and it would cost everything.