Last time try with AI.
## The Titan's End
**Genre:** Dark Fantasy / Isekai / Attack on Titan Fanfiction
**Logline:** Reincarnated into the Attack on Titan world 15 years before Eren Yeager's birth with the devastating power of Ultimate Waybig, a morally grey man decides the only path to true peace is the absolute extinction of Titans – and the Eldian people who bear their curse.
---
### Chapter 1: Waking in Hell
I opened my eyes to the smell of damp earth and unwashed humanity. Not my apartment. Not Earth. Straw tickled my neck. Sunlight, weak and filtered, came through a small, high window.
*Fifteen years old. Male. Eldian. Shiganshina District, Wall Maria. Paradis Island.*
The memories slammed into me like a titan's kick. My past life. Dying in my sleep. Watching... *Attack on Titan*. Every brutal, heartbreaking episode. The cycle of hatred. The endless, pointless suffering fueled by the power of the Titans. And the knowledge... the crushing knowledge of what was coming.
*Fifteen years before Eren Jaeger is born. Before Grisha even arrives.*
Fifteen years to prepare. Fifteen years to plan the only solution that made cold, logical sense. The only way to break the cycle permanently.
The hatred burned in my gut, hotter than any fire. Not for the mindless Titans – puppets of a broken system. But for the *shifters*. The ones who chose to wield that monstrous power. Marleyan Warriors. Eldian Restorationists. The traitors within the Walls. All of them. Playing god with lives. Annie. Reiner. Bertholdt. Zeke. Their faces, their actions from the anime, flashed behind my eyes. The sheer, casual cruelty. The walls breaking. Carla. Marco. Petra. Levi Squad. Countless nameless others. Powerlessness. That's what they inflicted.
They would know it. Every single one of them. Especially *her*. The one who played with her food.
But first, I needed power. *My* power. I focused inward. It was there. Not an Omnitrix. No fancy gadget. Just... an innate knowledge. A shape waiting to be unleashed. *Ultimate Waybig.* Cosmic energy hummed under my skin, vast and terrifying. I could feel it. The sheer scale. The destructive potential. The *invulnerability*. The Curse of Ymir? Meaningless dust against this cosmic biology.
A grim satisfaction settled over me. The tools were in hand. The goal was absolute: **End the Titans.** Permanently. Utterly.
And the only way to do that? End the Eldian bloodline's ability to become Titans. All of it. Every last Eldian. Sterilization. A quiet, bloodless extinction over a generation. No more Subjects of Ymir. No more Paths. No more Founding Titan pulling strings. No more Marleyan Warrior program. Just... silence. Peace through annihilation of potential.
To do that, I needed the power. All Nine Titans. The Founding, the War Hammer, the Attack, the Colossal... all of them. Concentrated in me. Then, with that ultimate authority over Eldian biology... flick the switch. Turn off their reproductive capacity. Worldwide. Instantly.
The method? Brutal simplicity. Ultimate Waybig could consume a Titan shifter. Absorb their power. The Curse wouldn't touch me. I was something else. Something *more*.
I wouldn't be a hero. I wouldn't be a villain. I would be the necessary end. Morality was a luxury for those not burdened with cosmic power and future sight. The path with the least *immediate* bloodshed led through the absolute extinction of a people. So be it.
I spent the next fifteen years preparing. Learning the rhythms of Shigansina. Training my human body – strength, endurance, stealth. Observing. Waiting. The power thrummed within me, a contained supernova. I lived quietly. Worked simple jobs. Made no real friends. They were all doomed anyway, one way or another. Better a quick, painless end than the horrors the future held.
The hatred for the shifters never faded. It festered. Especially for the one who would someday be called the Female Titan. Her calculated cruelty, her cold eyes in the anime... she represented the worst of them. When her time came, she would understand true powerlessness. I would ensure it.
My moment would come. I knew the date. The hour. The exact spot.
The day the Colossal Titan first peered over Wall Maria.
---
### Chapter 2: The Shadow of the Colossal
**Third Person Perspective: Shiganshina District, 845 - Year 0 (Eren's Birth Year)**
Sunlight beat down on Shiganshina. Market day. The air buzzed with the mundane sounds of life: bartering, laughter, the clatter of carts. Children chased each other through the crowded square. Garrison soldiers lounged near the inner gate, complacent after a century of peace. The Wall, Maria, stood immovable, a testament to safety.
High above, perched on a rooftop near the outer gate, *he* watched. The reincarnated soul. He wore simple, worn clothes, his face unremarkable, blending into the sea of Eldian faces below. His eyes, however, held the weight of lifetimes and the chill of absolute purpose. He scanned the crowd, the soldiers, the massive stone gate.
*Eren Yeager is born today,* he thought, the knowledge a cold stone in his gut. *Irrelevant now. Today changes everything.*
**His Perspective (1st Person):**
The sun was too bright. The noise too loud. It felt surreal. Fifteen years of waiting, of planning, of containing this cosmic power vibrating just beneath my skin. Today. Right now. The colossal idiot was about to make his dramatic entrance.
I saw the Garrison soldiers laughing. Saw Carla Yeager, heavily pregnant, talking with another woman near the Yeager clinic. Saw the future Survey Corps recruits, kids still, playing soldier. All blissfully ignorant of the hell about to break loose.
My focus was absolute. The top of Wall Maria. The spot just left of the outer gate.
A tremor ran through the stone beneath my feet. Subtle. Most wouldn't notice. Then another. Stronger.
Panic started as a ripple. Heads turned upwards. Conversations died mid-sentence. A low rumble, felt more than heard, vibrated through the city.
Then, shadow.
A massive, skeletal head, wreathed in impossible steam, slowly rose above the parapet of Wall Maria. Skinless muscle glistened in the sun. Empty eye sockets gazed down upon Shiganshina with terrifying indifference.
**Third Person: Crowd**
Gasps turned to screams. Pure, unadulterated terror ripped through the marketplace. The Colossal Titan! A myth! A nightmare made real! People froze, minds unable to process the impossible scale. Then, instinct took over. Stampede. A wave of humanity surged towards the inner gate, towards Sina, towards perceived safety. Children were trampled. Carts overturned.
**Garrison Soldier Dirk (Thoughts - 1st Person):** *Oh Founder! It's real! It's HUGE! The gate! It's looking at the gate! Move! MOVE! Why won't my legs work?!*
**Carla Yeager (Thoughts - 3rd Person):** *Grisha... the baby... Hannes! Where's Hannes?! Eren! I have to get to Eren!* Terror warred with maternal instinct, rooting her momentarily to the spot near her clinic door.
The Colossal Titan raised its massive, skeletal foot. Steam billowed violently around it. Time seemed to slow. It was going to kick. It was going to shatter the gate holding back a century of Titans.
**His Perspective (1st Person):**
Showtime.
No grand speech. No warning. Just the end of their world, and the beginning of mine.
I let the power surge. Not a transformation. An *unleashing*.
**Third Person: Event**
The air directly above the surging, panicked crowd near the outer gate *ripped*.
Space itself seemed to fracture, screaming in protest. A blinding flash of cosmic energy, white-hot and laced with crackling blue, erupted upwards. It wasn't fire. It was raw creation, raw destruction. The sheer pressure wave flattened stalls and sent people tumbling yards away.
From the epicenter, something colossal *arrived*. Not emerged. *Arrived*. Like a meteor forged from starlight and fury.
It dwarfed the Colossal Titan.
Ultimate Waybig stood over two hundred meters tall. Its body was sleek, armored cosmic plating in shades of deep blue and silver, etched with glowing energy lines that pulsed with contained power. Massive, finned shoulders flared outwards. Its head was a horned helm, featureless save for two blazing points of white light where eyes should be. It radiated an aura of ancient, terrifying power that made the very stones of Wall Maria tremble. Steam hissed violently off its cosmic skin where it met the Titan's emission.
The Colossal Titan froze mid-kick. Its head slowly turned. The empty sockets fixed on the new, infinitely more terrifying presence that had simply *appeared* beside it.
Silence. Utter, deafening silence fell over Shiganshina. The stampede halted. Thousands of faces stared upwards, jaws slack, eyes wide with a terror that transcended the Titan they knew. This... this was something else. Something *alien*.
**His Perspective (1st Person - Within Ultimate Waybig):**
The sensation was incredible. Limitless power. The world was small, fragile. I saw everything. The tiny humans like ants. The pathetic steam-giant beside me. My hatred, amplified by this cosmic form, focused like a laser.
I didn't speak. My form *was* the statement.
I moved faster than anything that size should. One massive, cosmic-metal hand shot out. Not to punch. To *grab*.
My fingers, each thicker than a house, closed around the Colossal Titan's head and upper torso with a crunch of steaming bone and muscle. Steam billowed, scalding hot, but it washed over my cosmic armor harmlessly. Like warm breath on stone.
I felt the shifter inside. A tiny spark of life within the giant meat puppet. *Bertholdt Hoover. But not yet. Just some Marleyan pawn.*
No hesitation. No mercy. Shifters were the enemy. All of them.
I lifted the struggling, steaming Colossal Titan effortlessly. Then, with a contemptuous twist of my wrist, I slammed it downwards – not onto the city, but *through* the top of Wall Maria itself.
**Third Person: Event**
The impact was cataclysmic. Stone exploded outwards like rotten wood. A massive section of the Wall's top parapet vanished in a shower of debris and a shockwave that rattled teeth miles away. The Colossal Titan vanished into the cloud of pulverized stone and steam, driven deep into the Wall's structure.
Before the dust could settle, the Ultimate Waybig leaned into the newly created hole. One massive hand plunged into the rubble. It emerged clutching the broken, steaming, but still recognizable form of the Colossal Titan. The Titan thrashed weakly, its regeneration struggling against the cosmic force gripping it.
The giant cosmic entity raised its prey towards its featureless face. The two blazing white lights flared brighter.
Then, it opened its mouth.
Not a mouth. A chasm. A vortex of swirling cosmic energy and impossible darkness.
It brought the Colossal Titan towards that void.
**Garrison Soldier Alma (Thoughts - 3rd Person):** *It's... eating it? Founder above, it's EATING the Colossal!* Her mind shut down, overloaded by the horror.
**Carla Yeager (Thoughts - 1st Person):** *...What... what is that thing? Is it... saving us? Or...* A deeper terror, primal and cold, seeped through her initial shock.
The Ultimate Waybig shoved the upper half of the struggling Colossal Titan into the cosmic maw. There was a sickening, wet *crunch*, amplified by the entity's sheer size, echoing across the suddenly silent district. Steam burst violently from the Titan's severed lower half, still clutched in the cosmic hand, before it dissolved into nothingness. The upper half vanished into the swirling darkness.
The cosmic entity stood upright. It raised its head, the two white lights scanning the horizon beyond the Wall. Titans, drawn by the commotion, were shambling towards the massive hole in Wall Maria.
A low, resonant hum began to emanate from the giant. The energy lines across its body blazed brighter. It raised one fist, clenched. Cosmic energy, blinding white and blue, gathered around it, crackling like contained lightning.
Then, it punched. Not at the Titans. At the air *above* the breach.
Space shattered.
A beam of pure cosmic energy, thicker than the Wall itself, lanced out from the fist. It tore through the atmosphere, not burning, but *erasing*. Where it passed, the air itself screamed and ionized. It struck the ground miles beyond the Wall, far behind the approaching Titans.
The earth didn't explode. It *vaporized*. A canyon of molten glass, kilometers long and impossibly deep, instantly seared itself into the landscape. The Titans caught in the periphery simply ceased to exist. Those further away were blasted apart by the shockwave or melted by the heat bloom.
Silence returned, heavier than before. The hole in Wall Maria smoked. The newly formed canyon glowed white-hot in the distance. Titans were gone, obliterated or scattered. The Colossal Titan was consumed.
The Ultimate Waybig lowered its fist. It turned its blazing gaze slowly across the petrified city. Thousands of faces stared back, frozen in abject terror. It lingered for a moment, an impossible god of destruction standing amidst the ruins it had both created and prevented.
Then, space ripped again. A flash of cosmic light. It was gone.
As suddenly as it appeared.
Only the devastation remained. The hole in the Wall. The molten scar on the earth. The stunned, terrified silence. And the horrifying knowledge: something infinitely worse than Titans now walked their world.
**His Perspective (1st Person - Back in an Alley):**
I leaned against the cool stone wall of a back alley, breathing hard. Human again. Sweat soaked my shirt, but it was just exertion. The power... using it was effortless. Containing the sheer *scale* of the hatred while wielding it? That took focus.
The taste lingered. Not flesh. Not blood. Pure, condensed Titan energy. The power of the Colossal. It settled inside me, a new furnace beside the cosmic one. *One down.*
Panicked screams finally erupted from the main streets. The shock was wearing off. Good. Let them fear. Let the news spread. Let Marley know their Colossal was gone, consumed by something beyond their comprehension.
I looked towards the inner gate. Carla Yeager was being helped by Hannes, looking dazed but alive. Eren Yeager would be born today, into a world forever changed. Irrelevant. He would never become the Attack Titan. That power would be mine too. Eventually. All of them.
The path was set. The first blow struck. The next shifters wouldn't know what hit them. Especially *her*. My lips curled into a cold semblance of a smile. The Female Titan. I would savor her powerlessness.
The greater good demanded it. Sterilization required all Nine. The bloodshed of the shifters was the price for the peace of generations unborn.
I melted into the shadows of the alley, just another scared refugee. The hunt for the remaining Eight had just begun.
---
*(Subsequent Chapters would cover the systematic hunt for the other Titans over the next few years. The MC uses his human form to gather intel, identify Shifters – often Marleyan agents infiltrating early or Eldians holding the powers within the Walls. Each confrontation is brutal and one-sided in Ultimate Waybig form. Key moments include:)*
* **Chapter 3: The Armored Ambush:** Trapping the Armored Titan (a different Marleyan Warrior) outside the Walls. Shattering its armor with cosmic energy blasts before tearing it apart and consuming the shifter. No Reiner's trauma here, just brutal efficiency.
* **Chapter 4: Whispers & The Founding:** Discovering the Reiss Chapel. Confronting Frieda Reiss. Demonstrating immunity to the Founding's will manipulation before consuming her. Taking the Coordinate.
* **Chapter 5: The Jaw in the Underground:** Hunting the elusive Jaw Titan through Mitras' underworld. A short, savage fight ending with the shifter crushed in Waybig's fist.
* **Chapter 6: Cart & Beast Beyond the Sea:** Infiltrating Marley (using Waybig to cross the ocean undetected). Locating the Cart and Beast Titans (different shifters). Overwhelming Zeke's Beast with sheer power and speed, then consuming both shifters. Marley witnesses its ultimate weapons devoured.
* **Chapter 7: The War Hammer's Last Stand:** The Tybur family unleashes their secret weapon. An impressive display of hardening constructs, all shattered by cosmic energy. The shifter pulled from their crystal cocoon and consumed.
* **Chapter 8: The Female Titan's Agony:** Finding the Female Titan shifter (an original character, a cold Marleyan operative). The MC deliberately prolongs the fight. Smashes her hardened fists. Catches her mid-sprint, fingers closing slowly, deliberately, breaking bones. Forces her to revert by crushing her Titan nape partially. Catches the terrified, injured human shifter (a woman). Makes deliberate, terrifying eye contact. *"You enjoyed their fear. Their powerlessness. Feel it now."* Consumes her human form slowly, visibly, letting her scream echo before silencing her forever. The most brutal absorption, fueled by the MC's specific hatred from his anime memories.
* **Chapter 9: The Attack's Final Charge:** Confronting Grisha Yeager (who obtained the Attack Titan as per canon). Grisha, desperate, attacks. The fight is pitifully short. Grisha is consumed, the final piece falling into place. Eren Yeager is never born a Subject of Ymir.
---
### Chapter 10: The Greater Silence
**Third Person: Paths Dimension**
The swirling, endless desert of Paths was silent. No Founder Ymir. No endless lines of Titans being sculpted from sand. Only Him. Standing in his human form, yet radiating the combined, unimaginable power of the Nine Titans, fused with the cosmic energy of Ultimate Waybig.
He felt it all. The Founding's absolute authority over Eldian biology. The War Hammer's creation. The Colossal's steam. The Armor. The speed of the Jaw. The endurance of the Cart. The Beast's scream. The Female's hardening. The Attack's relentless drive. All bound and mastered by the cosmic entity within him.
He saw them all. Every Subject of Ymir. Living or yet to be born. Millions of threads stretching across the world. Across time. He saw the Paths connecting them, a vast, intricate web. The power to command. To alter memories. To reshape flesh.
He didn't want command. He wanted an end.
**His Perspective (1st Person):**
This was it. The culmination. The power was staggering, immense. It sang in my blood, screamed in my mind. The Nine Titans, their essences writhing within the cosmic core of my being. Ultimate Waybig was the crucible, containing and dominating them utterly.
I saw the Paths. Saw the threads connecting every Eldian life. Saw the potential futures branching out – futures filled with more Titan wars, more Walls, more Rumbles, more suffering. Futures where Eldians were persecuted, or futures where they became the persecutors. All roads paved with Titan power. All leading to bloodshed.
My way was cleaner. Kinder, in the long run.
I focused the Founding Titan's power. Not to command. Not to alter. To *edit*. To remove one specific, fundamental function from every Subject of Ymir, everywhere, across all time. Past, present, future. The Paths transcended time; so would this command.
The target: Reproductive capability. The ability to create new life capable of bearing the Titan curse.
I channeled the absolute authority. I focused the raw cosmic energy of Waybig as a lens, amplifying, refining, making the command *absolute* and *permanent*. No loopholes. No exceptions. Not even for me. (It didn't matter; I wasn't truly Eldian, and Waybig's biology was beyond the Curse anyway).
The command formed. Simple. Final.
**"All Subjects of Ymir: Your lines end with you. The spark of new life within your kind is extinguished. From this moment, no Eldian shall conceive or bear a child. The curse dies with this generation."**
I unleashed the command through the Paths. It wasn't a wave. It was an instantaneous, immutable rewrite of biological reality, echoing down every thread, touching every Subject of Ymir, living or yet conceived (who instantly ceased to be potential). A silent, global switch flipped.
**Third Person: World**
* **In Liberio Internment Zone:** A young Eldian couple embracing felt a strange, cold emptiness settle where hope had been. They didn't understand why.
* **In a Marleyan lab:** An Eldian scientist studying Titan biology dropped a vial. A profound sense of finality washed over him, unrelated to the broken glass.
* **In a Hizuru trade delegation:** An Eldian diplomat paused mid-sentence, a chill running down her spine, a vague sense of a door closing forever.
* **In Shiganshina:** Carla Yeager, holding her newborn son Eren (just a normal baby now, forever free of the Titan curse), felt a sudden, inexplicable pang of sorrow, followed by a strange peace. She hugged Eren tighter.
* **On a remote island:** A lone Eldian fisherman felt the vast, ancient connection to his people... sever. Not painfully, but definitively. Like the last note of a song fading.
No grand spectacle. No physical pain. Just a quiet, universal understanding deep within the soul of every Eldian: Their kind would not continue. They were the last.
**His Perspective (1st Person - Paths):**
It was done.
The silence in the Paths was deeper now. The weight of the Nine Titans within me felt... inert. Their purpose, their curse, was fundamentally broken. The Founding's power had achieved its final, defining act: not control, but cessation.
I felt no triumph. No guilt. Only grim satisfaction. The Titan threat, the root cause of centuries of suffering, was eradicated. Not just the monsters, but the *potential* for monsters. Forever.
The cost? The end of a people. A genocide of the unborn. Was it worth it? To me, yes. The immediate bloodshed of war, of Rumbles, of endless conflict – that was avoided. Countless future lives would never know the horror of Titans, the fear of persecution for their blood. They simply... wouldn't exist. Peace through absolute, silent extinction.
I released my hold on the Paths. The desert faded. I stood alone on a grassy plain somewhere on Paradis, human once more. The sun was setting.
The power of the Titans still resided within me, fused with Waybig. But they were just powers now. Tools. The curse was broken. The Paths were empty. Ymir's tortured soul? Released, perhaps. Or finally at rest. It didn't matter.
I looked towards the Walls. Humanity inside would scramble. They'd find the hole in Maria. They'd eventually discover the Marleyan threat was crippled, their Titans gone. They'd face a future without Titans, but also without understanding why. Let them rebuild. Let them have their fragile peace. My work was done.
The Eldians would live out their lives. They would age, and die. And with them, the last memory of Titans would fade into myth, then oblivion. A quiet end.
I turned away from the Walls. Ultimate Waybig's power thrummed, ready for anything. But there was nothing left *to* do here. My purpose was fulfilled. The greater good, as I saw it, was served. The bloodshed ended not with a bang, but with a silent, biological full stop.
I walked into the gathering twilight, a cosmic engine of destruction carrying the ghosts of Nine Titans, leaving behind a world forever changed by the ultimate act of morally grey mercy: annihilation disguised as peace. The Titan's End had come, delivered not by a hero or a villain, but by an ending.