The Greatest Assassin Gets Reincarnated in Tensura

Velzard lay motionless in the vast crater left by their battle, her once-pristine white garments tattered, her icy aura flickering unevenly. For the first time in her existence, she had been bested in a one-on-one battle.

The pain didn't bother her—she was a True Dragon, after all, and such wounds would heal in mere moments. But the humiliation, the shock—those were harder to recover from.

"How… how did this happen?"

Her piercing blue eyes stared up at the sky, still in disbelief. Veldora had never been stronger than her. He had always been reckless, unfocused—a brute force of nature that lacked refinement. She had always been the one to put him in his place when he caused trouble.

But now…

"Did I… fall behind?"

A terrifying thought crept into her mind, one that shook her to the core.

"If I don't train more… will I become the little sister instead?"

She clenched her fists, ice spreading around her instinctively as if trying to restore her wounded pride. This couldn't stand.

Somewhere in the distance, she could still feel Veldora's presence—no longer lingering, but fading away into the horizon, disappearing in a flash.

He had left without even gloating.

That hurt more than the beating itself.

Far away, in the depths of a secluded kingdom, another powerful existence was continuing his experiments unlike any other.

Valentine, the Primordial Vampire, continued creating new species—perfecting the vampire race was number one on his list.

His methods, however, were anything but conventional.

He did not merely create species—he bred them. Mixing his own perfect genes with those of different beings, refining them through generations, he sought to build the ultimate vampire lineage.

And in this long, meticulous process, he created her—Luminous Valentine.

She was flawless. Beautiful, powerful, and intelligent beyond measure. The ultimate result of his experiments.

But there was one thing he had not anticipated.

She had a will of her own.

When she finally matured and understood her father's purpose for her, Luminous rejected it.

"You expect me to exist just to be your breeding machine?"

Her heterochromia eyes glowed with rage as she confronted him.

Valentine had seen himself as a (god) among his kind, believing his word was law—but in that moment, he realized his daughter was not just another creation. She was a being in her own right.

And she would not be used.

While the True Dragons and powerful beings played their own games, the world continued to evolve. Kingdoms rose, alliances were formed, and conflicts simmered beneath the surface.

One nation, in particular, stood on the precipice of a dangerous ambition.

A kingdom ruled by High Humans—an elite race that saw themselves as superior to all others.

Their king, Jahil, was a man with grand aspirations.

"Why should we, the strongest of all races, bow to lesser beings?" he declared in his throne room, surrounded by his most trusted generals.

He had ruled his kingdom for years, but it was not enough. He wanted more.

"We will conquer the weak. We will unify the world under my rule. And I shall be Emperor."

His generals nodded in agreement—except one.

A younger strategist stepped forward, his expression contemplative.

"My King, direct conquest is one way… but there are easier methods. What if we do not need to waste our armies in battle?"

Jahil narrowed his eyes. "Speak."

The strategist smirked.

"We summon a demon."

Silence filled the room. Even the battle-hardened generals shifted uncomfortably.

"A demon?" Jahil repeated.

"Yes, my King. Not to rule us, not to serve us—but to eliminate our targets before we even march. If a powerful enough demon wreaks havoc upon our enemies, they will be too weak to resist us. Then we take over… without shedding a drop of our own blood."

A slow grin spread across Jahil's face.

"Clever. Very clever."

He turned to his court mage.

"Begin preparations. We shall summon the strongest demon we can find."

And that… would be the greatest mistake of his life.

For centuries, Luminous Valentine endured the relentless pressure of her father, the Primordial Vampire, Valentine. He was the progenitor of the vampires, their absolute ruler. And he had decided that she—his most perfect creation—would serve one purpose.

To breed.

To be the mother of a new generation of ultimate vampires, refining their bloodlines until they reached his vision of perfection.

But Luminous was no mere tool.

And she had had enough.

In the grand halls of Valentine's palace, Luminous stood before her father, her crimson eyes burning with restrained fury. This was not the first time they had this conversation—but it would be the last.

"Father, I will not do this."

Valentine, dressed in regal black robes, his piercing gaze locked onto his daughter. He exuded dominance, an aura that made even the strongest of his creations tremble in his presence.

But not her.

"Luminous," he said in a calm yet authoritative voice. "You will. It is not a request. It is your duty as my finest creation."

She clenched her fists. Duty. That was what he always called it.

"My duty?" she repeated, stepping forward. "Did I ask to be created? Did I ask to be your 'perfect' specimen? You see me as nothing more than a tool to refine your precious bloodline. A breeder. But I am not your puppet!"

Valentine sighed, as if speaking to a child who refused to listen.

"You do not understand. This is bigger than you. It is about the evolution of our kind. With your blood, I will create a race of vampires that will surpass all. You should be honored."

Luminous laughed. A cold, bitter laugh.

"Honored?!" she spat. "You would reduce me to a womb, a vessel to be used and discarded, and you expect me to be honored?"

For the first time, something in Valentine's expression changed. It was subtle—a flicker of impatience.

"You are my creation, Luminous. Your purpose is not yours to decide."

That was it. The last push.

A chilling silence stretched between them before Luminous spoke again—this time, with finality.

"Then you leave me no choice, Father. If you will not see me as more than a tool… then you will not see anything at all."

She turned and walked away.

Valentine did not stop her. He thought she would return. That she would eventually accept her fate.

He was wrong.

That night, Luminous met with two of the strongest vampires under Valentine's rule—Gunther and Louis.

Gunther, her loyal protector, had always seen her as more than just Valentine's "perfect creation." To him, Luminous was a true queen.

Louis, on the other hand, was a cunning tactician. He saw Valentine's rule as absolute—but he also saw the cracks forming. And he saw in Luminous the only true alternative.

The three met in secrecy, deep within the ruins of an ancient cathedral.

"You plan to kill him?" Louis was the first to speak, his voice low, measured.

Luminous' gaze was sharp. "Yes."

Gunther inhaled sharply. A direct rebellion against Valentine? No one had ever dared to challenge him. The mere thought of it was unthinkable.

But looking into Luminous' eyes, he knew she had already made up her mind.

"Then we must be thorough," Louis said after a long pause. "Valentine is not just powerful—he is cunning. If we misstep even once, he will slaughter us before we can act."

Luminous nodded. "Which is why we will not fight him at full strength."

Gunther's eyes narrowed. "You mean…"

"We will weaken him," Luminous confirmed.

She unfurled a parchment, revealing a complex array of runes and magical seals.

"These spells will suppress his regenerative abilities, his speed, his ability to manipulate blood. He will be weakened—but not enough to suspect a trap until it is too late."

Louis studied the inscriptions carefully. "Impressive. But how do we lure him?"

Luminous smirked.

"We use me."

Gunther's fists clenched. "No! It's too dangerous—"

"It's the only way," she interrupted. "If I pretend to submit, if I tell him I have accepted my 'duty'—he will come to claim me. And when he does… we strike."

Louis exhaled. "You truly are his daughter."

Gunther still looked troubled, but he bowed his head.

"Very well. If this is your command… then I shall follow."

Luminous placed a hand on his shoulder.

"Not just a command, Gunther. A promise. This ends tonight."

Everything was set. The ritual site had been prepared—an ancient underground chamber, reinforced with layers upon layers of spells designed specifically to suppress Valentine's overwhelming power.

Now, all that was left was to bring him here.

Luminous stood alone in the vast chamber, bathed in the glow of enchanted torches. She had sent word to Valentine, telling him that she had "seen the error of her ways."

She knew him well. He would not ignore such a message.

And she was right.

The moment he arrived, his presence suffocated the room.

Valentine did not walk—he glided. The sheer weight of his aura made the air feel thick, as if reality itself bent around him.

"So… you have come to your senses." His voice was smooth, confident. He was not the least bit suspicious.

Luminous lowered her gaze, playing her part.

"Yes, Father. I was… foolish to resist you."

A smirk touched his lips.

"You see now, don't you? This is your purpose. And I will ensure that you fulfill it."

He reached out—and the moment his fingers touched her skin, the chamber ignited.

A thousand magical seals flared to life.

Valentine's smirk vanished.

His eyes widened in genuine shock as the power-suppressing enchantments wrapped around him, leeching away his strength.

"What… have you done?" His voice was no longer calm.

Luminous stepped back, her smirk now mirroring his usual arrogance.

"I told you, Father."

Gunther and Louis appeared from the shadows, their weapons drawn.

"I am not your tool."

Valentine's rage exploded. His aura surged, but the seals held. His movements slowed. His power faded.

For the first time in his eternal existence, Valentine was vulnerable.

And Luminous was ready to end him.