Optimus Prime moved with decisive force, without a word, he drew his sword and swung.
Ego, the ancient Celestial whose very consciousness spanned the surface of an entire planet, was caught completely off guard.
This lone Cybertronian? A mere machine, daring to strike him, a god of the cosmos?
If it were Surtur or Martin, beings of truly destructive caliber, Ego might have braced himself. But this... this robot didn't even register as sub-Skyfather level by his scans. Not even close.
Ego let out a scoffing laugh that rumbled across tectonic plates.
"Foolish scrap metal. Your master may possess power, but that does not mean a glorified tool like you does as well! Let me show you what it truly means to face a Celestial!"
His enormous visage, etched into the very crust of the planet, curled into a sneer as his wrath ignited. Ego opened his gaping maw, unleashing a silent, overwhelming torrent of energy, a storm laced with divine cosmic might, intended to erase Optimus from existence.
But then—
A flash of light erupted from Optimus Prime's seemingly unadorned greatsword. It was sudden, blinding, and terrifying. In that instant, the raw energy flared not merely at the sub-Skyfather level, but at the absolute pinnacle of full Skyfather-class might.
"Perish."
Optimus's voice was calm, unflinching, his optics glowing coldly. With one swift leap, he brought the sword down, channeling an immense, focused force that could shatter star systems, now condensed into a single devastating strike aimed directly at Ego.
For a brief moment, the light of countless stars dimmed beneath the shadow of his blade.
CRACK—
The sword cleaved through Ego's cosmic breath like it was mist, continuing onward with unstoppable fury, tearing across the planetary surface and carving a scar tens of thousands of kilometers long.
For a planet-sized entity, such a gash was not just a wound, it was a mortal injury.
Ego let out a guttural, cosmic scream, resonating with both agony and disbelief.
"You should've known the consequences of invading this sector," Optimus declared, his form dwarfed by the planet-god, yet causing wounds of godlike proportion. "Whatever your intentions, this is where your journey ends."
"You… what is that weapon?" Ego roared, shifting his planetary consciousness toward the wound now carved across his face. His voice trembled not just with rage, but with shock. "How can a machine, a worm, wound a Celestial?!"
He studied the sword's energy signature. There, within its alloy, he sensed relics of Odin's Vault: fragments of Gungnir, threads of Uru metal, and other mysterious forces he'd never encountered before.
"Odin, you fool! You die, Asgard falls, and someone uses your legacy to forge a new divine weapon?!"
Fury and humiliation boiled inside Ego. His divine ego, nurtured over eons, was now smeared with the blood of defeat. The thought that a mechanical being had harnessed Skyfather-tier weaponry to wound him was unthinkable.
"There are many artifacts in the cosmos," Ego seethed. "But they're just tools. They don't make gods!"
And yet this machine was wielding such a weapon with devastating precision and mastery.
"You're weaker than I expected," said Optimus, lifting his gaze without emotion. Then he struck again.
With each swing, waves of destructive energy ripped through the void.
Ego's planetary body began shifting; rapid acceleration, stellar winds, eruptions of cosmic fury. His retaliatory strikes decimated stars, shockwaves tearing through space.
Yet each time, Optimus deflected with his blade or evaded via the Rainbow Bridge, powered by the residual Asgardian tech encoded in his armor.
The battle escalated, each exchange more violent than the last. Ego's shell was now ravaged, his surface layered with craters and gashes.
In places, the white-hot glow of his planet-core bled through. That was his true vulnerability: the energy matrix anchoring his celestial consciousness.
"Damn you! DAMN YOU!" Ego roared, venting rage across the cosmos, obliterating nearby moons and gas giants with careless blasts. He ripped holes in space itself, desperate to destroy the being that refused to fall.
Optimus remained silent, his optics dimming slightly.
"…Energy reserves depleted…"
His brows furrowed. His reserves, once in the tens of millions of units, had been nearly drained from sustaining full-force blows with the divine-enhanced sword.
"I need to end this. Now."
He scanned quickly, and found what he needed: a massive fissure in Ego's surface, a tear that led straight toward the core.
BOOM!
A beam of rainbow light crashed down—the Bifrost.
With a blur of motion, Optimus was transported across the void and landed on the trembling shell of Ego's form. The Celestial's divine aura interfered with the Bifrost's trajectory, otherwise, Optimus would've gone straight for the core.
Still, he wasn't too late.
With one massive strike, he shattered a whirlpool of divine energy guarding the fissure and leapt inward, sword held tight.
As he descended, he stabbed his blade into the walls, dragging himself deeper and leaving smoking gashes in his wake.
"COME OUT, YOU INSIGNIFICANT INSECT!" Ego bellowed, now truly panicking. From within his planetary core, pulses of explosive energy surged upward, desperate to expel the intruder.
"You cannot stop this," Optimus growled. "Your fate is sealed."
He pressed on through the fury, resisting every blast with sheer will and steel. Then he reached it, the core.
Without hesitation, he reversed his grip and raised the sword high. With a low snarl of effort, he plunged the blade straight into Ego's core.
The result was catastrophic.
The fusion of two opposing divine forces, Asgardian tech and Celestial essence, ignited into a cosmic chain reaction. Waves of silence and destruction exploded outward, forming ripples that distorted space like a dying star's final scream.
Ego shrieked. A raw, pitiful, dying howl. His planetary body convulsed, fracturing from the inside out. Cracks spread like wildfire, fissures racing across every continent of his surface.
KA-THOOM!
A detonation worthy of a galactic extinction echoed across the stars.
Ego was annihilated.
Divine essence scattered in every direction like fragments of a dying god's dream. Only after many long moments did the shockwaves finally begin to dissipate.
At ground zero, amidst the still-settling dust of shattered divinity, stood a battered figure.
Optimus Prime.
Barely standing, his armor mangled, one arm severed, half his face scorched and mangled. The sacred Spark in his chest, the core of a Cybertronian's life, flickered faintly, nearly extinguished.
But in his remaining hand, he held it—a piece of Ego's core. A glowing, semi-solid lump still pulsing with fading Celestial energy.
"He's… finally dead," Optimus muttered, his voice a dry rasp of steel and smoke.
He looked up into the void.
Then he raised his sword high, bloodied, divine, and triumphant, its tip pointing toward the stars.
The Bifrost blazed into life once more, casting down a radiant beam.
And like a war-god risen from the husk of fallen divinity, Optimus stepped through the light.
The Rainbow Bridge faded.
Optimus Prime vanished.
He had slain a god, and walked away.
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