Fused Zamasu grinned menacingly at John Doe and the other two. He raised his right fist and touched it to his left hand.
Slowly, he pulled out a weapon made of pinkish energy from his left hand, which appeared in his right hand.
As the weapon fully materialized, it revealed itself to be a long-handled, pink scythe of death.
Fused Zamasu casually waved the scythe, and it tore through Earth's space, revealing a purple realm through the rift.
Countless chaotic noises emerged from the purple realm.
A voice shouted, "Who dares to tear open the skies of our Demon World? Are you seeking death?"
The loud voice startled John Doe and the others. They couldn't believe that the purple realm was actually the Demon World.
A massive figure emerged from the purple space, with two horns on its head, resembling the previous Demon King, Dabura.
However, when the figure saw what it was about to face, it was immediately terrified and tried to retreat.
But escape was easier than returning. Fused Zamasu sneered, "All humans must die!"
With a gentle swing of the scythe in his hand, the Demon King who had tried to retreat was instantly decapitated. Blood splattered as the body fell from the sky, landing on the ground and dying at Fused Zamasu's feet.
The demon creatures in the other side of the purple realm witnessed their king's swift demise and dared not approach. They fled, fearing that Fused Zamasu would pursue them into the Demon World. Soon, the rift between the two realms was devoid of any demon creatures.
Fused Zamasu burst into laughter at the effect he had caused. Wielding the scythe, he turned to John Doe and the other two, shouting, "I am invincible!"
His arrogance was overwhelming. John Doe and the other two gritted their teeth, but they had no countermeasure. They lacked the means to fuse.
Defeating Majin Buu earlier had been too easy, so they hadn't needed to use the fusion technique.
After his laughter subsided, Fused Zamasu said, "Enough. It's time to end this fight. You dared to come to this future to challenge me, so prepare to die here."
With a flash, Fused Zamasu appeared behind John Doe and the others. He spun around, swinging the scythe, and launched a powerful attack.
John Doe, Goku, and Vegeta instantly transformed into Super Saiyan Blue. John Doe raised his hand, gathering an energy blade that he slashed against the scythe.
Goku and Vegeta joined forces, rushing towards Fused Zamasu and unleashing a barrage of attacks.
Fused Zamasu's weapon was long-handled, so to avoid the scythe's lethal force, they had to engage in close combat.
John Doe pulled the scythe away from Fused Zamasu, while Goku and Vegeta relentlessly attacked him, one targeting the upper body and the other the lower.
With one of Fused Zamasu's hands occupied by John Doe, Goku landed a punch on his face, and Vegeta followed up with a kick to his abdomen, sending Fused Zamasu flying.
However, Fused Zamasu quickly stabilized himself after being knocked back a distance. He patted his body, brushing off nonexistent dust.
This time, Fused Zamasu retracted his scythe, transforming it back into a pink blade, and smiled, "You're stronger than I anticipated. I hope you can keep this up."
He vanished from his original spot with a teleport.
"Be careful, everyone!" Goku shouted.
The three of them immediately stood back-to-back, but Fused Zamasu appeared above them, firing countless energy blasts that shattered their defensive stances.
As they dodged the energy blasts, Fused Zamasu flashed and appeared in front of Vegeta.
Vegeta punched, but Fused Zamasu dodged by crouching and then struck Vegeta's abdomen with a punch.
Just as Fused Zamasu was about to swing his blade at Vegeta, John Doe teleported and kicked Fused Zamasu from the side.
Fused Zamasu sidestepped the attack and swung his blade downward. John Doe twisted his body, and his heel struck Fused Zamasu's back as he flipped over.
However, Fused Zamasu was not one to back down. He used John Doe's attack to his advantage, charging towards Vegeta, parrying his punch with a raised arm, and then punching Vegeta in the face.
Vegeta was sent flying, crashing into a broken building and creating a cloud of dust.
John Doe and Goku continued their assault on Fused Zamasu. Whether Fused Zamasu had adapted to his newfound power or not, he evaded all their attacks.
As the two exhausted themselves, Fused Zamasu seized the moment, dashing in and delivering a punch to Goku's abdomen and a kick to John Doe's face, sending them both flying.
"Damn it, John Doe, do you have a way to beat him?" Goku asked.
"Yes!" John Doe replied.
Goku's spirits lifted at John Doe's response. "What's the plan?"
"The first method is to fuse ourselves," John Doe suggested.
"Do you have the kind of magical earrings that the Supreme Kai wears?" Goku asked eagerly.
John Doe shook his head. "No!"
"What do you mean, no?" Goku's face fell in disappointment. "What's your second method, then?"
"The second method is to awaken the Ultra Instinct," John Doe proposed. "If we can awaken it, we can defeat him."
"Can you awaken it?" Goku asked.
"I don't know. Let's try. Can you?" John Doe countered.
Goku shook his head. "I'm not sure either. We've only been learning Ultra Instinct for a short time."
"Then let's give it a shot," John Doe said. "I'll go first and hold him off while you calm your mind."
With that, John Doe charged towards Fused Zamasu, and Vegeta, who had been buried under rubble, also emerged and joined the attack.
The two of them assaulted Fused Zamasu while Goku focused on calming his mind on the ground.