Before they set off, John Doe spoke to Trunks, "Trunks, you take Mai and hide far away. We don't know how this will turn out, and if things go wrong, you must immediately take Mai and use the time machine to return to our original world."
After saying this, John Doe followed Vegeta and flew towards the enemy.
In no time, the three of them landed in front of Black John Doe.
Looking at John Doe, Goku, and Vegeta before him, Black John Doe spoke, "I never thought that after destroying your time machine, you would still be able to come here."
Vegeta smirked, "There are many things you don't know. This time, I will definitely beat you to a pulp!"
After saying this, Vegeta transformed into Super Saiyan Blue and attacked Black John Doe.
Black John Doe tried to block the attack, but in his base form, he couldn't match the speed of Super Saiyan Blue Vegeta. Vegeta easily dodged his block with a slight movement and landed a punch on Black John Doe's abdomen.
Black John Doe cried out in pain, and Vegeta continued his assault, landing punch after punch on Black John Doe's body and face.
After a relentless barrage of dozens of punches, Vegeta spun around and delivered a flying kick, sending Black John Doe flying. He smashed through several buildings before being buried under a pile of rubble.
Vegeta's attack didn't stop there. He flew above Black John Doe and started firing off energy blasts, attacking relentlessly.
Countless energy blasts rained down on the spot where Black John Doe was buried, causing a series of explosions. The battlefield was filled with smoke and dust until Black John Doe's energy completely disappeared, and only then did Vegeta cease his attack.
Vegeta landed on a rooftop, waiting for the smoke to clear.
However, before the smoke could dissipate, Black John Doe's energy suddenly erupted again.
A furious roar from Black John Doe echoed through the smoke, and countless green energy rays spread out, slicing through obstacles in their path as if they were sharp blades.
Then, a gust of wind blew away the smoke, revealing Black John Doe in his transformed state, with a golden-green aura.
"This is the power of the legendary Super Saiyan! That's right, I almost forgot that your body is John Doe's," Vegeta said.
Meanwhile, John Doe and Goku noticed someone standing next to Black John Doe, dressed almost identically to the Supreme Kai, which immediately sparked a realization.
"Are you Zamasu?" John Doe asked.
"But didn't you swap bodies with John Doe? How is there another Zamasu?" Goku quickly followed up.
Zamasu and Black John Doe remained silent, staring coldly at John Doe and the others.
"That's right, I almost forgot that there's another Zamasu in this world. Black John Doe came from another parallel world," John Doe explained, answering Goku's question.
At this moment, Black John Doe spoke, "Although I swapped bodies with John Doe, I discovered that this body possesses immense hidden potential, but I couldn't bring it out."
"Even transforming into a Super Saiyan was not easy for me. However, after our battle in the past world, where you severely injured me, I found that my control over this body has been steadily increasing as I recovered."
"Moreover, I discovered a powerful trait of the Saiyans. Every time they are on the brink of death, their strength increases significantly."
"Look, I can already transform into a Super Saiyan now, can't I?"
Black John Doe clenched his fists, feeling the immense power within this body. He continued, "What surprised me even more is that there's another power hidden within this body, and it requires anger to unleash it."
"The more anger, the stronger the power. And I have no shortage of anger."
"I'm furious that such a beautiful planet is occupied by humans like you. Yet, you humans show no gratitude to this planet. You wage wars, kill each other, and slaughter other races without restraint."
"Don't you feel ashamed?" Black John Doe shouted righteously.
Vegeta spat out a mouthful of saliva and retorted, "You're a hypocrite. You criticize us humans, but are you any better?"
"Look at the Earth you've destroyed. Is this your idea of protecting the planet? It's just a cover for your inner bloodthirst."
Zamasu was a man of unwavering conviction, unmoved by others' words. He scoffed, "Hmph! Once I eliminate all humans, I will restore this planet to its pristine state."
"You won't be able to eliminate humans. Don't think that just because you can transform into a Super Saiyan, you can defeat me. It will only prolong your inevitable demise," Vegeta said, attacking Black John Doe again.
The two of them engaged in another intense battle. Unlike before, Black John Doe, having awakened his Super Saiyan form and acquired the power of the gods, was now able to hold his own against Vegeta's Super Saiyan Blue form.
Although he was still on the receiving end of most attacks, Black John Doe's strength continued to grow with each blow from Vegeta.
John Doe, with a serious expression, turned to Goku and said, "This won't do. We have to help. If this continues and he transforms into Super Saiyan Blue, it will be bad."
After saying this, John Doe transformed into Super Saiyan Blue, intending to attack Black John Doe.
However, Zamasu quickly stepped in front of John Doe, brandishing a purple energy blade.
"You dare to stop me? Get out of my way!" John Doe shouted, grabbing Zamasu's arm and crushing his bones with a powerful grip.
John Doe then placed his hand on Zamasu's chest and fired an energy blast, piercing right through it. He casually tossed Zamasu aside.
As John Doe was about to continue his attack on Black John Doe, Zamasu, who should have been severely injured, grabbed John Doe's ankle.
Zamasu smirked, "Do you think these minor injuries can break my immortality?" As he spoke, his wounds healed, and he returned to his original state, without any signs of damage or loss of energy.