"This is the effect of fusion," Karnel said, examining his transformed state with wonder. "My strength has increased nearly a hundred-fold in just ten minutes!" The two Potara earrings on his ears seemed to pulse with their own energy, giving him an almost divine presence. He gently grabbed Kairos and used Instant Transmission to move them both to the surface of a nearby planet.
"Fusion? Is this another one of your impossible techniques?" Kairos asked, shaking his head in amazement. Realizing he'd be nothing but a liability in the coming battle, he walked over to lean against a massive crystalline tree. "I'll sit this one out. Try not to destroy the entire solar system while you're at it."
Buu erupted from the crater he'd created upon impact, his small eyes blazing with malevolent fury. Without hesitation, he fired a massive energy wave at Karnel, the pink beam crackling with enough power to vaporize a moon.
Karnel calmly raised one hand and caught the energy blast as if it were nothing more than a thrown ball. With a slight squeeze of his fingers, he converted the attack into his own blue energy and sent it rocketing back with unstoppable force, piercing straight through Fat Buu's bloated stomach.
"Oh? Your attack is completely useless!" Buu's body bounced back to its original state like rubber, his face twisted in a triumphant grin. "Nothing you do can hurt me!"
"Useless, you say?" Karnel's mouth curved into a cold smile.
In the blink of an eye, he appeared behind Buu with a soft "whoosh" of displaced air. Before the pink demon could react, Karnel grabbed his head and rocketed toward the planet's surface, driving him down with the force of a meteor.
They crashed through the surface, through layers of rock and metal, all the way to the planet's molten core, before bursting out the other side in a shower of debris. Karnel hurled Buu high into the air and fired a concentrated energy cannon that completely evaporated the creature's body, leaving only his head floating in space.
"How about it?" Karnel crossed his arms, his voice dripping with indifference. "Still think it's useless?"
Buu's disembodied head stared in shock as his body rapidly regenerated. For the first time since absorbing the Grand Supreme Kai's wisdom, he felt something he'd never experienced before: genuine fear.
"After digesting the Grand Supreme Kai's knowledge, you're developing emotions so quickly," Karnel observed with clinical interest. "Fear is just the beginning. Let me show you something that will terrify you even more!"
His eyes blazed with crimson light as he unleashed his full power. The divine energy within his consciousness began to surge wildly, spinning faster and faster until traces of light red aura poured into his ki, intertwining until they became indistinguishable. The merged energy took on a brilliant golden-red hue.
"HUUUAAAAAA!!!!"
Karnel's hair erupted into the familiar golden spikes of the legendary form, but nearly half of it had turned a distinctive light red. His emerald eyes now glowed with crimson undertones as his aura exploded outward in a magnificent display of gold and red energy.
With unlimited energy at his disposal thanks to the fusion, Karnel held nothing back. Every cell in his body hummed with unimaginable power.
After the fusion and transformation combined, his strength had reached an incredible 5,000 times his normal state.
"With this divine aura enhancing my Super Saiyan form, I've far exceeded the power of Super Saiyan 3, maybe even Super Saiyan 4," he murmured to himself, analyzing his current capabilities. "Though I'm still far from achieving Super Saiyan God. Perhaps when my divinity fully matures into a true one, that will be the day I reach that legendary level."
Because he had perfect control over his power, no destructive phenomena accompanied his transformation. The energy was contained, focused, and absolutely devastating.
Karnel looked at Buu with calm confidence. "Tell me, are you feeling confident about surviving what's coming next?"
Buu's face contorted with rage and desperation. Mist began rising from his body as he prepared to launch a berserker assault, the kind of reckless attack that would kill a thousand enemies while injuring himself eight hundred times.
"No matter how hard you struggle, it's completely pointless," Karnel said with unprecedented calm. His strength was now so overwhelming that he felt no concern about Buu's desperate tactics.
What followed wasn't a battle, it was a one-sided demonstration of absolute power.
Fat Buu threw everything he had at Karnel: energy blasts that could shatter continents, physical attacks that moved faster than light, regeneration abilities that had made him seemingly immortal. None of it mattered. The landscape around them was devastated by Buu's wild attacks, but Karnel remained untouched, effortlessly countering every assault.
After thoroughly demonstrating the futility of resistance, Karnel decided to end the charade. Time was running out on his fusion, and he had no intention of letting this drag on any longer.
With a casual punch, he sent Buu crashing to the ground and stepped on his chest, pinning him in place.
"You're going to die by my hand right now," Karnel declared with finality. "This is the Grand Supreme Kai's final wish, and I won't leave it to Goku and the others to handle."
"You bastard, I'm going to eat you!" Buu shrieked, his face a mask of pure hatred. He didn't understand half of what Karnel was saying, but the threat was clear enough. Pink energy erupted from his body as he tried to force the foot off his chest. The tentacles on his head began to glow as he fired a blast of transformation magic at Karnel's face.
"How ugly," Karnel whispered, deflecting the magic with one hand. "You're nothing like the innocent Buu from the original timeline." He applied pressure with his foot. "Die."
With Karnel's current unparalleled strength, even the slightest force was devastating. Fat Buu was driven deep into the ground as the area around them, spanning tens of thousands of meters, began to collapse. The invisible crater beneath seemed to possess its own gravitational pull, sucking in chunks of broken earth and compressing them downward. The entire planet began to deform, one side bulging outward while the other developed a massive concave depression.
Buu struggled to climb out of the deepening pit, but suddenly a blue energy wave wrapped with red threads struck him, pressing him down with irresistible force.
"Ahhh!" Buu stretched out both hands to block the energy blast, gritting his teeth in desperation. His limited intelligence couldn't comprehend how this warrior who had been losing to him just minutes ago had become so impossibly powerful.
But blocking the attack was beyond his capabilities, let alone pushing it back. His body was rapidly forced deeper into the planet's core as the energy beam intensified. For the first time in his existence, Buu felt genuine terror and regret.
"If I had just killed him earlier," he thought desperately as the high-energy impact began disintegrating his palms, "I wouldn't be in this situation now..."
"I will definitely come back!" Buu roared as half his body evaporated under the relentless assault. "And when I do, I'll eat every last one of you!"
His final threat was cut short as the massive Super Kamehameha completely obliterated him at the cellular level. The ten-meter-thick energy beam punched through the entire planet, and moments later, the world exploded in a brilliant flash of light.
After the explosion faded, both Buu and the planet had been reduced to cosmic dust drifting through the void.
Karnel floated in space, carefully extending his senses to make absolutely certain that Buu's evil presence had been completely eradicated. Only when he was satisfied that no trace remained did he allow himself to relax.
The evil Buu who had destroyed one-tenth of the planets in the Northern Galaxy, killed the Grand Supreme Kai, and absorbed two other Supreme Kais, had finally met his end.
"Wait," Karnel's eyes narrowed as he detected another familiar energy signature. "That evil wizard is still... Found you, you little rat. Did you really think you could escape?"
He appeared beside a large asteroid where the wizard Bibidi was cowering in terror, having watched his greatest creation's complete annihilation.
"Wait... wait, don't kill me!" Bibidi pleaded desperately. "I was just—"
His words were cut short as Karnel crushed him with a single gesture.
"If you hadn't caused so much trouble here, the Supreme Kais wouldn't have died," Karnel said coldly, tossing Bibidi's body into the void before obliterating it with an energy blast. "And you still had the audacity to beg for mercy."
Kairos, who had wisely retreated to a safe distance when the planet began to explode, watched in awe as both the terrible creature and its creator were utterly destroyed. The universe was finally safe from Buu's reign of terror.
The fusion had worked beyond all expectations, and the greatest threat to the cosmos had been eliminated. Now, as the Potara earrings began to flicker with fading energy, Karnel knew his time in this merged state was coming to an end. But the victory was complete, Buu would never threaten another world again.