A crossover exploring what would happen if Eren Yeager, the one who vowed to destroy his enemies, acquired the Death Note…
Chapter 1: The Notebook of Death
Eren Yeager stood on the walls of Shiganshina, gazing at the ruins left behind by the Titans. The screams of his mother’s death echoed in his mind as he clenched his fists.
“I will kill them all… every last one of them.”
But one day, as he walked through the ruined streets, something strange caught his eye.
A black notebook lay on the ground, seemingly untouched despite the destruction around it. Curious, Eren picked it up. The words on the cover read:
“Death Note”
He flipped it open, reading the rules:
- The human whose name is written in this note shall die.
- The cause of death must be written within 40 seconds. If no cause is written, the person will die of a heart attack.
At first, Eren scoffed.
- “What kind of joke is this?” he muttered.
- Then, he thought about it.
What if this… was real?
That night, unable to resist his curiosity, he decided to test it.
Chapter 2: The First Name
In the underground prisons of Paradis, a traitor sat in his cell—a Marleyan spy who had infiltrated the military.
Eren grabbed a pen. His hands trembled as he wrote:
“Jorick Flanders – Heart Attack”
Forty seconds passed.
A guard’s scream broke the silence. Eren rushed down the hall and saw it—Jorick was dead, his eyes wide in terror.
The Death Note was real.
Eren’s heart pounded in his chest. A new power had fallen into his hands.
A power that could change the world.
Chapter 3: Meeting the Shinigami
That night, as Eren sat in his room, a shadow loomed behind him.
- "You finally used it," a deep, raspy voice said.
Eren spun around, his instincts screaming danger. A tall, monstrous figure with glowing red eyes and black wings stood before him.
- "I am Ryuk," the creature grinned, showing his sharp teeth. "And you, Eren Yeager, are the new owner of my Death Note."
Eren narrowed his eyes. "A Titan?"
Ryuk laughed. "Oh no, I’m far worse."
The Shinigami explained the rules of the Death Note, how it worked, and that he was merely an observer.
- "I dropped it here to have some fun. Let’s see what you do with it."
Eren clenched the notebook. His mind raced.
If this power could kill anyone… then what if he used it on the Titans?
Chapter 4: Testing the Limits
Eren immediately began writing the names of every Titan Shifter he knew.
- Annie Leonhart.
- Reiner Braun.
- Bertholdt Hoover.
- Zeke Yeager.
He waited. Forty seconds passed.
Nothing happened.
Ryuk chuckled. "Names alone won’t work unless they’re in their human forms. Titans… don’t count as humans."
Eren gritted his teeth. His dream of eliminating the Titans in an instant was shattered.
But then, a new idea formed in his mind.
- "If I can’t kill Titans, then… I’ll use this against humans."
Chapter 5: The Beginning of a New War
Eren’s thoughts darkened. His hands trembled, not with fear, but with power.
- “The real enemies… are the ones controlling the Titans.”
With the Death Note in hand, Eren started writing the names of Marleyan generals, leaders, and spies.
Within days, news spread that high-ranking Marleyan officials were dying mysteriously.
The world began to panic.
The balance of power was shifting.
And no one knew that the mastermind behind it all… was a single boy from Paradis.
Chapter 6: The Deaths of the Warriors
Eren devised a new plan—to lure the Titan Shifters into their human forms.
With Hange’s help, Paradis orchestrated an attack that forced Reiner, Annie, and Zeke to transform back into humans to strategize.
In that moment, Eren wrote their names.
One by one—they dropped dead.
- Annie fell, clutching her chest.
- Reiner collapsed, his armored body useless.
- Zeke gasped, choking on his own blood.
The Warriors of Marley were gone.
Paradis had won.
Or so Eren thought.
Chapter 7: The Death of Friends
As Eren’s power grew, so did his paranoia.
He began to wonder—what if his own people turned against him?
The first to question his actions was Armin.
- "Eren, this isn’t like you," Armin said. "You’re killing indiscriminately. This isn’t freedom!"
- "You don’t understand," Eren growled. "I’m doing what must be done."
That night, Eren wrote down a new name.
"Armin Arlert – Dies in his sleep."
The next morning, Mikasa screamed. Armin was dead.
Eren felt no regret.
- "Anyone who stands in my way… will die."
Chapter 8: Mikasa’s Revenge
Mikasa was devastated. She had always stood by Eren, but now… he had gone too far.
With tears in her eyes, she made a decision.
She had to stop him.
Leading a small resistance group, Mikasa stormed Eren’s hideout. She fought her way through, taking down soldiers who still blindly followed Eren.
When she finally found him, Eren was sitting in a dark room, the Death Note open in front of him.
- "Mikasa," he said, looking up. "You came."
- "You killed Armin," she whispered. "You’re not the Eren I knew."
Eren stood, gripping the Death Note. "The world needs to be cleansed, Mikasa. I’m just doing what’s necessary."
Tears streamed down her face.
- "Then I have no choice."
Steel met flesh.
Mikasa’s blade sliced through Eren’s neck.
Eren Yeager… was dead.
Epilogue: A Legacy of Fear
The Death Note remained. It was hidden, buried in a forgotten grave.
Years later, a young scout found it.
He opened the pages, reading the words "Eren Yeager" scribbled across its history.
- "What is this?" he whispered.
From the shadows, a pair of glowing red eyes watched.
Ryuk grinned.
- "Let’s see what the next owner does with it."
The cycle would begin again.
Final Thoughts
If Eren had the Death Note:
- He would eliminate Marley’s leaders immediately.
- He would use it to kill Reiner, Annie, and Zeke in human form.
- His paranoia would grow, leading him to kill even his closest friends.
- Mikasa would be the one to stop him.
In the end, Eren’s desire for freedom would consume him.
And the Death Note would continue its path… to the next hands that would hold it.
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