The Sacred World of the Kais was a mysterious planet so vast and majestic that even among countless worlds in the universe, it stood out.
Here lived the Kais—gods who held the power of creation.
When life in the universe waned, they scattered divine energy to create new planets fit for life, sowing seeds of living things.
As for whether those lives blossomed or strayed into ruin… that was usually outside their direct interference—
Though exceptions did exist.
Such as a certain future "Goku Black."
Ordinarily, the Kai Realm was serenely quiet.
Endless green plains, crystal-clear lakes, gentle mountains, and strange, docile creatures living in peace.
The Kais often mingled among them, sharing the calm.
But today, this long-quiet land saw rare "commotion."
"Hey! It moved! Vitelli-san, it moved!"
Supreme Kai Shin pointed excitedly at Vitelli, shouting like a hundred-kilo child.
Vitelli, putting everything he had into pulling the sword, almost choked on the sudden yell and nearly threw out his back.
He glared. "Shut up! What do you mean I moved? The sword moved! Learn to speak!"
For a god, Shin was absurdly unreliable.
Shin shrank sheepishly, scratching the back of his head.
"Sorry, sorry. I got too excited. Please continue, Vitelli-san."
Whis stood aside, smiling elegantly, somehow producing a bag of snacks to munch with a carefree crunch-crunch, utterly at ease as if this were just a show.
Vitelli ignored them, steadied his breathing, and gripped the Z-Sword's hilt again.
He inhaled sharply and unleashed his energy. Muscles tightened as he poured in force.
"Up…!"
He grunted low.
The sword, despite looking ordinary, was shockingly heavy—as if fused to the very land of the Kai Realm.
He had to use nearly eighty percent of his power before the blade grudgingly began to rise, centimeter by centimeter, dragging free as though breaking some ancient binding.
"Why is it this heavy?"
Vitelli was startled.
"With my current base power, am I still weaker than Gohan when he went Super Saiyan 2?"
It only deepened his sense of the sword's strangeness.
Finally—
Shing!
With a crisp, ringing sound, the Z-Sword came completely free.
The full blade gleamed with an ancient, mysterious aura.
Vitelli exhaled long, set the heavy sword down on the grass with a thunk, and flexed his sore wrists.
"Vitelli… san?"
Shin crept closer, eyes bouncing between Vitelli and the sword, face full of hope and anxiety.
"Where… where is Ancestor-sama? You said if you pulled it out, he'd appear, right?"
Vitelli smiled, picked the sword up again, and casually weighed it in his hand.
"Relax, Shin. You Kais can create things from nothing, right? Make me a chunk of the hardest metal in the universe."
Shin blinked. "I can… but why? To make a scabbard? I can just make a perfect scabbard directly."
Vitelli waved him off.
"Stop asking. Just do it."
"…O-okay."
Shin pointed lightly into the air.
Light gathered, and a massive, square block of dark metallic alloy dropped onto the grass with a heavy boom, shaking the ground.
"This is the hardest known alloy in the universe. Its structural stability and strength—"
He never finished the sentence.
Vitelli suddenly swung the Z-Sword like a club and slashed down hard onto the metal block.
"AHHHHH!!! Vitelli-san!!! What are you doing?!"
Shin covered his face and shrieked.
CRACK!
The ancient Z-Sword snapped in two on impact.
The upper half spun away and clattered into the grass.
Dead silence.
Shin froze, blood draining from his face. He dropped to his knees, trembling, scrambling to cast restoration magic while choking on tears.
"The sword… the Z-Sword… it's broken… how…? Ancestor-sama is gone…!"
Vitelli sighed, amused and helpless.
"Uh… maybe look behind you first?"
Shin couldn't hear. His mind was drowning in "the sacred sword is destroyed," "I'm a sinner," "I've betrayed my ancestors."
He fumbled with the broken blade like the sky had fallen.
But Kibito, still stunned, heard Vitelli's words. He turned stiffly to look behind Shin.
His eyes widened like saucers.
"L-Lord Kai! Behind you! Look behind you!"
Shin flinched, blinking up at Kibito in confusion.
"What? Behind me is just Whis—"
He turned around—
And saw an elderly man in Kai robes, wearing Potara earrings, standing on the grass not far away.
Hands behind his back, he surveyed the scene with stern curiosity.
When Shin finally noticed him, the old man cleared his throat in a grand, senior voice.
"I am a Supreme Kai from fifteen generations past. You juniors may call me Old Kai, or Ancestor-sama."
He looked at Vitelli first.
"Kid, thanks. That was… a rather special way to break the seal and free me."
Clearly, he'd seen everything.
Then he spotted Whis and immediately bowed with surprise and respect.
"Oh my, isn't that Mr. Whis? Forgive my rudeness. I didn't expect you here. Where is Lord Beerus—"
Whis swallowed his snack gracefully and replied with a polite smile.
"Hohoho, you're too kind, Kai-sama. Lord Beerus is resting in the God of Destruction Realm. Do you need him for something urgent? I can relay it."
Old Kai paused, visibly relieved.
"So I don't have to face that bad-tempered Destruction God right away."
Then he asked, puzzled, "Then why have you come today?"
Whis gestured elegantly toward Vitelli.
"This is Vitelli-san, the new trainee God of Destruction for Universe Seven. I'm currently accompanying and assisting him."
"Trainee God of Destruction?"
Old Kai stared, then examined Vitelli closely.
After a moment, he nodded with deep admiration.
"Excellent. Solid foundation, refined ki, a remarkable leap in life-tier… and more importantly—"
He sucked in a breath, eyes sharp.
"You've already touched Ultra Instinct's threshold. Not mere beginners' luck, either—you're at an advanced Sign level!"
"To think Universe Seven could produce such a prodigy!"
Shin finally snapped out of his haze and scrambled to Old Kai, babbling.
"Ancestor-sama! You're really out! Vitelli-san told me and I doubted him— I'm so ashamed!"
Old Kai looked at him like a disappointed grandparent.
"You kids! I was sealed in that blasted sword for tens of thousands of years, waiting for a worthy Kai to discover the secret and free me—only for each generation to get worse! Your line is nearly extinct, and in the end an outsider had to save the day!"
"Good thing this trainee Destruction God showed up, or Universe Seven would've been in real trouble when the next crisis hit."
He faced Vitelli, bowing sincerely.
"Thank you, young Destruction God. I owe you."
Vitelli waved him off.
"Not a big deal. I came to fulfill my promise to Shin, but I also have a favor to ask."
"Oh? Speak."
"I heard you can unlock hidden potential in people."
Vitelli got straight to it.
"I want you to awaken whatever potential I still have sleeping inside."
Old Kai shook his head with regret.
"Kid, you're my benefactor. I shouldn't refuse. But…"
He pointed at Vitelli.
"You're already on the path of Ultra Instinct—and not at a shallow level. Your Sign stage is close to perfect."
He pinched two fingers close together.
"Do you know that Ultra Instinct itself is the deepest form of potential release?"
He said firmly, "Every time you enter Ultra Instinct, every time you fight guided by instinct and comprehension, your potential is being continuously awakened and converted into real strength. Haven't you felt how much faster your growth became after you started training it?"
Vitelli fell into thought.
Looking back… that was true.
So Ultra Instinct was basically a built-in potential unlocker.
"I get it," he said with new understanding. "I was being greedy."
"Hold on, kid. Don't be so quick."
Old Kai raised a hand.
"Even if I can't do the ritual… I might help you a bit with your understanding of Ultra Instinct."
Vitelli blinked. "You can guide Ultra Instinct too?"
The old man smiled, confident.
"Just a little, just a little. After all, I'm ancient. I have a few tricks in the box. Come on."
Led by Old Kai, Vitelli arrived at a cliff overlooking the vast plains—a peaceful, pure place perfect for calm training.
"Sit. Relax. Enter your Ultra Instinct state, but don't dive fully in. Keep a faint connection."
Vitelli sat cross-legged, closed his eyes, emptied his mind, and sought that feeling where instinct surpassed thought.
Silver light began to seep from him, his hair frosting silver—
He entered Ultra Instinct Sign but held it at the surface.
Old Kai watched closely, nodding in admiration.
"Outstanding… you've mastered Sign to this extent at such a young age."
Then—under Shin and Kibito's jaw-dropped horror—
Old Kai began circling Vitelli and doing an array of extremely… indescribable movements.
He flailed and danced in bizarre poses like some ancient ritual, humming and chanting nonsense syllables.
He spun around Vitelli, stomped, clapped, gestured wildly at sky and earth like a shaman gone rogue.
Shin and Kibito's faces burned red; their toes nearly curled through the grass.
Even Whis paused mid-snack, eyes flickering with something delicate and unreadable.
Vitelli kept his eyes shut, clinging to Ultra Instinct while the "visual and auditory pollution" pounded him from all sides.
His soul was screaming from embarrassment, and only sheer willpower kept him from breaking and jumping up.
The "spiritual contamination" lasted five whole hours.
When Old Kai finally stopped, panting and clutching his back as he sank onto the grass, even Shin and Kibito exhaled like they'd survived a war.
"Whew… okay, kid… feel your state now… I used everything I've got…"
Vitelli immediately focused and tried to enter full Ultra Instinct Sign.
The change was instant.
Without warning, dazzling silver light erupted from him like an explosion.
Silver flames roared around his body, purer, more ethereal, and far stronger than before.
"This…?!"
Vitelli was stunned.
He could feel it clearly—entering Ultra Instinct now was several times faster, nearly instantaneous.
His base strength had also shot up, and his limit within Ultra Instinct was dramatically higher.
It felt like a mist had been lifted from his world.
Whis's voice chimed in, teasing as ever.
"Amazing growth, Vitelli-san. It seems you're only one step away from Lord Beerus now. When you spar with him later, do be gentle~"
Vitelli dispelled the aura and shot Whis a deadpan look.
"I'm gentle with him? Whis, can you please be a person for once? Find a new victim to scam."
He knew better than anyone how much Beerus still hid.
He turned to Old Kai and bowed deeply.
"Thank you, Old Kai."
As awkward as the process was, the results were real.
Old Kai waved weakly.
Then Vitelli looked at Shin and got to business.
"Shin, when are you planning to handle Babidi and Majin Buu?"
Shin frowned, troubled.
"It'll take time. We detect faint signs of Babidi moving now and then, but he's extremely cunning and never reveals a precise location. If he doesn't show himself, we can't lock down where Buu is hidden."
Vitelli stroked his chin and dropped a bomb.
"Majin Buu is on Earth."
"…What?! How do you know?!" Shin snapped up, stunned.
Earth? That low-level backwater planet?
"Don't worry about how. I just know."
"Do you want me to go to Earth and erase him? End it in one shot."
Shin struggled, then shook his head firmly.
"No."
He explained seriously.
"Buu is Babidi's ultimate creation. If we destroy Buu without eliminating Babidi, he could gather resources again within a few hundred years and build an even worse Buu."
"We need to cut the root. We'll wait until Babidi exposes himself so we can wipe them out together. Until then, I'll keep close watch on Earth and nearby regions."
Vitelli shrugged.
"Fine. You handle it. When it's time to act, call me."
Sometimes brute force was simpler than plotting—
A classic Saiyan (and isekai) mindset.
After thanking Old Kai again, Vitelli and Whis left the Kai Realm.
Whis swung his staff; light wrapped them, and they vanished into faster-than-light travel.
Mid-flight, after passing several star systems, Vitelli's powerful senses caught a very familiar ki far out in the void.
"Whis, hold on."
Whis stopped instantly. They hovered in the silent depths of space.
Whis tilted his head playfully.
"Did you forget to ask Shin-sama for a reward? We can go back~"
Vitelli laughed.
"What reward? I helped them. Besides, Old Kai already 'thanked' me in that… special way."
He shuddered at the memory of five hours of spiritual assault.
He looked into the deep starfield, smiling with sudden mischief.
"Whis, you go back to the God of Destruction Realm."
"I think I've sensed an 'old friend' a few systems away. I'll go say hi. I should be back before dinner."
Whis tapped his staff lightly and left him with a final line as a streak of light.
"Honestly, Vitelli-san, even if you return after dinner, that's fine. I'll explain to Bulma that you're on important 'neighborly visits.' Hohoho~"
Vitelli rolled his eyes.
He pressed two fingers to his forehead, focused, and locked onto that familiar ki.
"Been a long time…"
His grin sharpened.
"Prince Vegeta."
In the next instant, he vanished.