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In a parallel world...
Zamasu watched the battle between Son Goku and Hit on a television. At this moment, his heart had already fallen into darkness, and the plan for humanity's extinction had silently taken root within him.
Thus, he murdered his master, Gowasu and he stole the Time Ring.
He had already consulted Zuno beforehand and learned the location of the Super Dragon Balls. He traveled one year into the future, seized Goku's body, and possessed it.
He killed Son Goku and even took his corpse away.
"Heh heh! What incredible power! What an extraordinary body! I am the greatest god in this world!"
Thus, Black Goku began developing Son Goku's body extensively.
To do so, he naturally had to engage in countless battles.
Black Goku reveled in his growing strength.
The Vegeta of this timeline had already sensed Goku's ki disappear and was rushing toward him at full speed.
Black Goku's expression shifted. With his current strength, he had absolutely no chance of defeating this Vegeta.
He intended to fight, but he was not yet Vegeta's match.
What he needed was time to grow stronger. So, he used the Time Ring to travel through multiple timelines.
Initially, he traveled to worlds where Goku and Vegeta were much weaker.
Like leveling up in a game, he grew stronger step by step.
During this process, he slaughtered countless versions of Trunks, Goku, and Vegeta.
Thanks to his relentless efforts, his power finally reached a certain level.
He then decided to travel to timelines where Goku and Vegeta were stronger to test his abilities.
However, something unexpected happened.
He had no idea that he was about to kick an iron plate.
...
In a certain parallel timeline.
Whoosh!
Black Goku appeared in a wasteland. To his astonishment, the scene looked exactly like the aftermath of the worlds he had himself ravaged.
Black Goku's attention was immediately drawn.
"Yo, shrimp!"
Yes! It was Vegito, the invincible man himself!
Standing opposite Vegito was the white-haired fused Zamasu.
This earth-shattering battle instantly lifted Black Goku's spirits. He hid in the shadows, carefully observing the fight.
Then came a voice that sent chills of excitement down his spine: "What's wrong? Is the power of a god this insignificant?!"
Hearing this, Black Goku's eyes lit up with excitement.
He looked back and forth between Vegito and Fused Zamasu.
They were moving so fast that he could barely keep up, unable to capture their movements clearly. He could sense Fused Zamasu's overwhelming might, a power far beyond his own.
Yet, even this unbelievably powerful Fused Zamasu was being toyed with by Vegito.
Just as Black Goku stood there, dumbfounded, a chilling scene unfolded before his eyes!
Vegito's energy blade pierced straight through Fused Zamasu's chest.
The battle had entered its most intense phase.
Unlike the Vegito from the original Dragon Ball Super, however, this one did not choose to unleash the Final Kamehameha.
This meant he wasn't going to back down anytime soon.
After stabbing Zamasu in the chest with his energy blade, Vegito launched into a brutal flurry of physical attacks.
He used only his brute strength to completely subdue Fused Zamasu.
He wasn't here to enjoy the thrill of battle.
He was there to deal with the nuisance known as Fused Zamasu! Just as he had beaten Fused Zamasu nearly to death, Vegito suddenly pulled out a small jar.
Then, he took out a talisman from behind him.
His intention was clear: to use the Evil Containment Wave to seal away Fused Zamasu.
Vegito's power was overwhelming. Goku Black had considered rescuing Fused Zamasu.
But Vegito's oppressive aura was suffocating. He had to swallow his anger and watch silently as Fused Zamasu was sealed away.
Even after everything was settled, Vegito still hadn't defused, his energy expenditure had been minimal.
"Damn it!" Goku Black muttered through gritted teeth from his hiding spot.
But that single curse nearly doomed him forever!
Vegito turned his head, and his piercing gaze cut across miles. In that instant, he locked eyes with Goku Black.
Death itself closed in on him!
Sensing imminent danger, Goku Black's body went rigid.
He quickly reacted, activating the Time Ring in a desperate bid to escape.
At that very moment, however, Vegito had already launched his Final Kamehameha, a massive wave of destruction surging toward Goku Black.
Just as the blast was about to engulf him, the Time Ring activated in the nick of time.
Goku Black barely escaped.
...
Future Bulma's timeline.
Goku Black was still shaken to his core. Yet that very terror planted a new seed within him.
Vegito's strength was overwhelming and beyond anything he had ever imagined. He had clearly seen that Vegito was the fusion of Vegeta and Son Goku.
His plan became clear: he would transform himself into Vegito.
With this resolve, Goku Black sought out Zamasu from this timeline. He invited Zamasu to join his scheme and slaughtered all the Kaiōshins of this world along the way.
Then, they returned to the timeline where Goku Black had stolen Son Goku's body.
His goal was to swap bodies between Vegeta and Zamasu.
Why this Vegeta? The answer was simple: he came from the same world as the Goku whose body Goku Black had taken.
Their compatibility would be perfect.
But first, Goku Black faced off against Vegeta.
He wanted to avenge his humiliation, something he couldn't do back then!
In this intense duel, both Goku Black and Vegeta were severely injured and left with battered, unrecognizable faces.
At that moment, Zamasu swapped bodies with Vegeta. Goku Black and Zamasu had been working separately to execute their sinister scheme.
Their plan succeeded, and the two traveled across timelines once again.
...
They summoned the Super Dragon once more. This time, Goku Black had a very specific wish in mind.
He remembered witnessing Goku and Vegeta fusing during Vegito's Final Kamehameha.
Now, he would ensure that his fusion would never end!
In the divine tongue, Goku Black addressed the Super Dragon: "Please fuse me with the one beside me, and ensure that we can never separate!"
Thus, a new Vegito was born.
A Vegito who would never defuse was born.
However, because Vegeta and Zamasu's faces were already battered and mangled at the time of the swap...
The fused being's face remained disfigured.
For this reason, Black Vegito chose to hide his face beneath a dark cloak.
(End of chapter.)