The Greatest Assassin Gets Reincarnated in Tensura

One year had passed like a fleeting shadow. Training in the abyss of darkness, honing his power, sharpening his instincts—every moment had been spent refining himself into something greater. Now, he stood at the edge of the vast, desolate training grounds, feeling the controlled pulse of his aura around him. He was stronger than ever. His power flowed like an extension of his will, no longer an untamed storm but a precise, deadly force.

Still, something felt incomplete.

"Lara," he spoke, his voice calm yet firm.

"Yes?" her voice resonated in his mind, always composed, always present.

"I want to ask you something important."

"Go on."

He crossed his arms, looking up at the darkened sky. "Do you have access to my past life's memories?"

There was a brief pause before she answered. "Yes. I have always had access to them, but I did not force the memories to the surface since you had not requested it."

That intrigued him. "So, you could have told me everything I forgot, but you chose not to?"

"Correct. Memories define one's identity. Forcing past experiences upon you too soon could have interfered with your current growth. You needed to establish yourself in this world first, before merging with your past self. Now, however, you are ready."

He smirked. "Then I won't waste any time. Use all of the knowledge, skills, and experiences from my past life and integrate them into my current self. I don't care if it's combat, strategy, weapon mastery, cooking, information gathering—anything that can make me stronger. Merge it all."

Lara remained silent for a moment before responding.

"Understood. However, be aware—this will not be a simple process. Unlike recalling fragmented memories naturally over time, what you are asking for is an immediate reintegration of an entire lifetime's worth of knowledge. It will be overwhelming. Your mind and body must be able to handle the flood of information."

His crimson eyes gleamed with determination. "I can handle it."

"Very well. I will begin the process. Brace yourself."

The moment she activated the process, his vision blurred. A wave of sensations crashed into him like a tidal storm, dragging him deep into a sea of memories that had once belonged to another version of himself.

Suddenly, he was no longer standing in the abyss—he was elsewhere.

A dark alley. The scent of blood. The weight of a dagger in his hand.

He was back in his past life, reliving the moment when he took his first life as an assassin. The precision of the kill, the rush of adrenaline, the cold detachment—it all returned to him in an instant. His hands instinctively clenched as muscle memory reawakened.

More memories surged forward.

Scaling a building without a sound. A silent kill in the dead of night. A sniper shot from 600 meters away, landing flawlessly between the eyes. Hacking into high-security databases, gathering intel before the enemy even realized they were exposed.

His mind struggled to keep up. His vision shifted again.

A kitchen, filled with the aroma of spices and sizzling ingredients. Expertly slicing vegetables, filleting fish with precision, balancing flavors to perfection. Cooking wasn't just about survival—it was an art.

Then—another shift.

The weight of a gun in his hand, disassembling and reassembling it in seconds. The satisfying click of a blade locking into place, adjusting his stance to counter any attack.

The flood of knowledge was unrelenting, drowning him in everything he had once known. His hands twitched, his muscles trembled as they adjusted to the skills being restored.

Then—silence.

He exhaled sharply, feeling his entire body thrum with newfound awareness. His stance had changed—more fluid, more instinctive. His fingers traced the air, remembering the feel of every weapon he had ever held, every movement he had perfected in his past life.

"The process is complete," Lara's voice echoed in his mind. "How do you feel?"

He opened his eyes, sharper than before. "Like I've finally woken up."

Lara's tone was analytical. "Your body and mind have now fully integrated your past skills. You are no longer just an assassin nor just a demon—you are both. Your combat instincts have evolved, your perception has sharpened, and your efficiency in both lethal and non-lethal skills has increased significantly."

He flexed his fingers, feeling the subtle difference in his control. Even standing still, he could feel the weight of the knowledge pressing against him. His mind was now a vast library of expertise—tactics, strategies, weapons, deception, stealth, culinary precision, survival techniques. He was no longer just powerful; he was refined.

"Show me," he said. "Show me what has changed."

Lara responded without hesitation.

"Your movement efficiency has increased by 30%. Your reaction speed has doubled. You can now instinctively switch between weapons without hesitation, utilizing each tool with maximum effectiveness. Your assassination techniques have merged with your demonic abilities, allowing for near-perfect stealth. Additionally, your knowledge of poisons, espionage, and psychological manipulation has been restored."

He grinned. "Perfect."

As he tested his new abilities over the next few weeks, he realized just how much he had changed.

- His stealth techniques were now almost supernatural. With his ability to suppress his aura and his assassin instincts, he could walk through enemy territory unnoticed, even by powerful beings.

- His combat skills had become unpredictable—switching from blades to firearms, mixing human assassination techniques with demonic speed and strength.

- His information-gathering abilities were razor-sharp, allowing him to dissect an enemy's weaknesses with minimal effort.

- His culinary skills, while seemingly unrelated, had improved to a level where he could craft dishes that even demons would crave.

It was no longer a matter of just being strong—it was about being unstoppable.

Lara's voice returned, cutting through his thoughts.

"Now that you have fully integrated your past self, there is only one thing left to do."

He raised an eyebrow. "And what's that?"

"Find an opponent strong enough to test the limits of your evolution."

His grin widened. He had come too far to stop now. It was time to see just how powerful he had truly become.