The Greatest Assassin Gets Reincarnated in Tensura

The fabric of space trembled, torn apart by two absolute forces. Veldanava, the Supreme Creator, and Arion, the newly ascended cosmic warrior, stood opposite each other, their divine auras colliding like raging storms.

A silence fell before their final attack. The weight of the battle had shattered countless dimensions, the echoes of their power stretching beyond time itself. This was not just a fight—it was a testament to existence, a clash of a creator and his chosen one.

Then, without a word, they moved.

Veldanava's eyes gleamed with limitless omnipotence as he extended his hand, forming a sphere of pure cosmic essence, pulsating with creation itself. Arion, eyes burning with unshakable resolve, unleashed a strike fueled by his newfound evolution—an attack forged from the very essence of the abyss and divine order.

The moment their powers met, the entire dimension exploded.

A cataclysmic detonation of light and shadow engulfed the battlefield. A blinding flash expanded endlessly, swallowing stars, consuming voids, stretching into eternity. The entire concept of space itself collapsed under the sheer force of their clash.

The heavens screamed. The laws of reality fractured.

And then—silence.

As the radiance faded, what remained was stillness. A void of endless light, shimmering remnants of the battlefield scattered like cosmic dust. And in the center—two figures still standing.

Arion exhaled, his form still intact, his body radiating immeasurable power, but his expression carried something deeper—awe. Across from him, Veldanava laughed.

It wasn't just laughter. It was a booming, joyous, unrestrained laughter, filled with pure exhilaration.

"Hahahaha! Magnificent!" Veldanava's voice shook reality itself, his golden eyes burning with elation. "This… this is what I wanted to see!"

Arion, breathing heavily, narrowed his eyes. "You're… happy?"

Veldanava smirked, raising his hand in a casual motion. With a mere gesture, he signaled the end.

And just like that, the battle was over.

With a single snap of his fingers, the fabric of existence twisted, and in an instant—they were no longer in Arion's dimension.

Arion froze. His eyes widened.

"…Impossible."

He turned rapidly, scanning his surroundings. He had created that dimension, a domain where he ruled as an absolute entity. A realm where even the gods could be bound by his will. And yet… Veldanava had undone it effortlessly.

Veldanava, now in his human form, simply smiled. His white robes gleamed with celestial light, his presence overwhelming yet warm. He walked toward Arion casually, as if what had just occurred was a mere sparring match rather than a battle that shook creation itself.

Stopping in front of him, he reached out and tapped Arion's shoulder, his laughter still carrying an undeniable warmth.

"I knew it." Veldanava's voice was absolute. "You were the right person. I made the right choice."

Arion's breath caught. His mind raced. The right choice?

His gaze sharpened, locking onto Veldanava. "This is the second time you've mentioned that."

The Supreme Creator smiled, his expression holding a wisdom beyond eternity.

"I know you have many questions," Veldanava said, his voice calm but filled with infinite meaning. "And I will answer them all."

He turned, looking toward the endless stars beyond their realm, the cosmic winds whispering through the void. Then, his golden eyes softened.

"But first… let me tell you a story."

And in that moment, as the universe itself seemed to listen, the truth behind Veldanava's choice was about to be revealed.

The air around them was still, yet heavy—the weight of reality itself pressing down on the moment. Arion's breathing was calm, but his mind was far from it. He had fought, he had clashed, he had witnessed destruction and rebirth in the blink of an eye, and yet… nothing had prepared him for what Veldanava was about to reveal.

Veldanava exhaled softly, his golden eyes shimmering like stars trapped in eternity. His voice, though steady, carried an unfathomable weight.

"In the future… I will marry a human woman. We will have a child. And I… will die."

A silence fell. A cold, deafening silence.

Arion's body stiffened. His mind reeled. His golden eyes narrowed, staring at Veldanava as if trying to decipher a puzzle that made no sense. How? How could the Creator die?

He wanted to speak, to demand answers, but his voice faltered. There were no words.

Veldanava, seeing Arion's stunned expression, smiled knowingly. His voice remained calm, almost gentle.

"It's not what you think," he said, lifting a hand as if to soothe Arion's rising confusion. "I am a god. I don't die. I can't die."

Arion's fists clenched at his sides. His heartbeat quickened.

"Then… what are you saying?" His voice was measured, but his mind raced.

Veldanava spread his arms, motioning to himself, to the body that stood before Arion.

"This body," he said, "is just an avatar—a mere vessel I use. The true power of my real existence… well, let's just say this world cannot handle it."

The words sank in.

Arion's eyes widened as realization struck. All this time… he had been fighting an avatar.

The very thought sent a shiver through his soul. This being before him, capable of shattering reality with a thought, was merely a fraction of the real Veldanava's power?

A heavy truth settled in Arion's chest—one he might never get the answer to. What was the true extent of Veldanava's power? Could anyone ever comprehend it?

Veldanava gave him time to process, his golden gaze holding nothing but patience. Then, he continued.

"I know what you're thinking," Veldanava said, his voice softer now. "Since I am a god, why would I allow this to happen? Why would I 'die' at all?"

Arion swallowed, still trying to piece together everything. "Yes," he admitted. "Why?"

Veldanava turned away for a moment, gazing into the endless cosmic abyss around them.

"Because this world… is just one of my many creations."

The revelation was staggering, but Arion forced himself to listen, every word coming from the Creator carrying immeasurable weight.

"At first, it was simply an experiment—a mere test," Veldanava admitted. "But somewhere along the way, I grew attached to it. I saw something… special in it. So I made a choice. Instead of destroying it, I decided to let it grow."

A deep sigh escaped him. "But soon, i will have to go."

His golden eyes glowed, a profound sadness flickering in them.

"My 'death' is simply my way of leaving this world. But I know my siblings, my followers… even the gods will never accept that easily. So, I created a reason."

Arion's brows furrowed. "A reason?"

Veldanava nodded.

"I will tell them I lost most of my powers when I created the world."

"By falling in love with a woman, having a child, and in doing so, the last of my divinity would fade."

Arion remained still, listening. Understanding.

"And when that happens," Veldanava continued, "some humans will decide to kill me."

Arion's breath hitched. "What?!"

Veldanava smiled wistfully. "It's simple, really. I made a rule within this world, enforced by the Voice of the World—that God must love all equally."

Arion remained frozen, hanging on to every word.

"By falling in love… I would be breaking that rule. I would be choosing one person above the rest. The Voice of the World would then strip me of my divine status, deeming me no longer a god but just another creature of the world. And as an 'anomaly'… humans will seek to eliminate me."

The sheer tragedy of it all hit Arion like a blade through the heart. Veldanava was choosing to be 'killed'—choosing to let the world believe he had died.

Arion's fists clenched. "You would let that happen… just so you could leave?"

Veldanava nodded. "It's the only way."

Arion perked up.

"She will be left alone. I will give her a pet dragon… a companion to ease her loneliness."

A sudden sharpness entered his voice.

"But that dragon will be killed."

Arion felt his heart sink. "What?"

Veldanava's expression grew grim. "And she will seek revenge. That rage, that sorrow… it will awaken something within her. She will evolve. She will become a Demon Lord."

The words carried an unshakable finality.

Arion stood still, absorbing everything. A child abandoned by fate, her only companion stolen from her, forced into power through suffering.

Veldanava turned to him, stepping closer. "I want you to watch over her."

Arion's breath hitched.

"But do not stop her from taking revenge."

Arion frowned. "Why?"

Veldanava's gaze held absolute certainty.

"Because through that evolution, she will gain the power I have left her. In this world, survival of the fittest is the ultimate rule. There is no crime in seeking power."

A deep silence followed.

Arion's mind whirled. It was cruel—a fate no child should bear. But at the same time… it was undeniable.

This world did not cater to the weak.

And Milim would become strong.

Veldanava sighed. "Now, about why I said I made the right choice in choosing you."

Arion lifted his gaze.

Veldanava's golden eyes locked onto his, filled with immeasurable trust.

"I want you to be my successor."

A thunderous silence followed.

Arion's heart stopped.

"What…?"

Veldanava continued. "I am leaving this world in your hands. You will be my invisible hand, the shadow that guides this world in the right direction."

Arion took a step back, shaken. "You… want me to succeed you?!"

Veldanava smiled knowingly. "You have already influenced my brother, Veldora, in ways no one else could. You are different, Arion. You operate in the shadows, but you bring change. I have seen your potential."

A heavy silence followed.

Arion looked away, his mind storming with thoughts. This was beyond anything he could have imagined.

But when he looked back at Veldanava, at the undeniable faith in his eyes, he knew…

This was fate.

"Veldanava," Arion began, his voice steady yet laced with an undercurrent of anxiety, "when will you die?"

The Dragon God's gentle smile faltered, replaced by a hint of sorrow that glimmered in his ancient eyes. "There is still time, Arion. But I feel compelled to tell you now. The weight of our world's future will rest upon you."

Arion's brow furrowed, his mind racing with questions. "But what about Guy? You appointed him as the mediator of this world. Surely he can handle the challenges ahead."

"Yes," Veldanava replied, his tone growing grave, "but you must understand, you possess strength that surpasses even his. The battles to come will be unlike any we've seen. Guy will also need a guardian—someone to watch over him as darkness stirs in the corners of existence."

Arion narrowed his eyes, the implications sinking in. "So you believe I can shape the future of this world?"

"You are an otherworlder," Veldanava said, his voice steady and firm. "You've experienced realms and realities that have given you insight beyond this world's confines. Your perspective can guide this world in ways Guy or any other being currently here cannot."

"There is good news," Veldanava continued, his expression softening slightly. "A slime will be reincarnated in the future in this world—Rimuru Tempest. He, too, comes from your world. You should assist him, even if it's from the shadows. Protect him, for he will be invaluable to the future of the cardinal world."

Arion felt as if he were standing at a crossroads, his mind a tempest of doubt and revelation.

"Arion," Veldanava said, his voice cutting through the chaos of thoughts, "I must ask you something of great importance. Do you accept to be my successor, the invisible hand that will shape and protect this world when the time comes?"

A profound silence enveloped them, the tension palpable. "I... I must consider this. What does it entail? What will become of me?"

"Master," a soft, ethereal voice resonated in his mind. It was Pandoria, his loyal companion. "You should accept this offer. But do not forget to ask Veldanava for a reward; a new power or gift will be necessary for the trials ahead."

"And why would I ask for that, Pandoria?" Arion questioned, glancing upward as if she stood beside him.

"You will be the new god of this world," she explained. "You must be stronger than you currently are. If formidable opponents emerge, you need the power to confront them."

Arion pondered for a moment, a spark igniting in his determination. "You have a point, Pandoria. The future is uncertain, and I must be ready."

He turned back to Veldanava, a newfound resolve flooding his being. "Very well. I shall accept. But tell me, what's in it for me? What will I gain by undertaking this immense responsibility?"

Veldanava's expression softened, pride evident in his voice. "By becoming my successor, you will inherit the essence of my power, granting you dominion over aspects of reality itself. You will become a beacon of hope, a guiding force in a world fraught with chaos. In addition, your strength will amplify; you will gain access to divine skills that will aid you in battle. But most importantly, you will shape the future, ensuring that peace reigns."

Arion's eyes widened at the magnitude of the offer. "And what skills would those be?

Veldanava nodded, his celestial presence radiating an air of solemnity as he gazed at Arion. "You will possess the Ultimate Skill: Information King Akashic Records. This skill will grant you access to all known Ultimate Skills, allowing you to wield abilities beyond the comprehension of even the strongest beings in existence." His voice was steady, yet it carried the weight of an undeniable truth.

Arion's eyes widened in disbelief. "All Ultimate Skills?" he repeated, his mind racing to grasp the sheer magnitude of such power.

Veldanava's expression remained calm, but there was an unmistakable flicker of pride in his gaze. "Yes. And in addition, I will grant you the ability to create new Ultimate Skills at will. You will not merely inherit knowledge—you will shape it, redefine the very limits of what is possible."

A surge of exhilaration coursed through Arion's veins, but he knew better than to let excitement cloud his judgment. "This is beyond anything I could have imagined… but power alone is not enough. There are threats even beyond what we know."

Veldanava nodded in agreement. "That is why I will bestow upon you a fragment of my divine essence. With it, you will gain access to divine power—an authority that only I, as the Creator, have wielded until now. This will elevate you beyond mortals, beyond even Demon Lords and True Dragons."

Arion took a step back, absorbing the immensity of what he was being offered. The very essence of a god… the power to transcend all limits.

"With this, you will not only protect this world," Veldanava continued, his voice unwavering, "but you will stand as a force that shapes its destiny. No calamity will rise that you cannot face. No adversary will emerge that you cannot surpass."

Arion clenched his fists, his mind made up. "Then I accept. I will carry this burden, not just as your successor, but as the one who ensures this world endures."

Veldanava smiled, a rare expression of genuine warmth. "Then it is done. From this moment forward, you are no longer merely Arion. You are the one who will watch over existence itself."

As Veldanava raised his hand, golden divine energy swirled around Arion, flooding his being with an unfathomable power. His fate was sealed—he was no longer just an observer of this world. He was now its guardian, its architect, and its shield against the darkness to come.