The Greatest Assassin Gets Reincarnated in Tensura

The nameless demon exhaled slowly, steadying himself as Noir's presence seemed to merge with the surrounding darkness. It was as if the entire battlefield was his domain. The illusions flickered and shifted, their glowing eyes locked onto him.

"Lara, analyze his movements. I need to force him into revealing his true position."

"Understood. Engaging battlefield analysis. Probability of counterattack: 78%."

With a burst of speed, the nameless demon unleashed a wave of darkness-infused slashes, cutting through the illusions like paper. The energy rippled outward, disrupting the lingering shadows, but he knew—Noir wouldn't fall for something so simple.

A flicker—there!

Without hesitation, he activated Sovereign of Shadows, weaving himself into the very fabric of darkness before launching forward at an angle Noir wouldn't expect.

BOOM!

A concentrated explosion of energy tore through the air—but Noir wasn't there.

A voice whispered behind him. "Too predictable."

The nameless demon barely turned before a dagger of pure shadow stabbed toward his ribs. He twisted at the last second, using Abyssal Devourer to consume a portion of the attack, but Noir's strike still landed, slicing a deep wound across his side.

Blood trickled down.

Noir smirked. "Your reaction time isn't bad. But you're still not on my level."

The nameless demon's lips curled into a smirk of his own. "Is that so?"

He reached out—and in an instant, dark tendrils erupted from his shadow, wrapping around Noir's arm.

"Got you."

Noir's eyes flickered with intrigue—just before the nameless demon activated Abyssal Devourer at full power.

The moment it triggered, a massive gravitational force erupted, twisting space itself, pulling Noir in. The ability didn't just absorb energy—it consumed and repurposed it.

"Lara, how much can I take?"

"Caution advised—overuse will cause severe instability. Noir's energy is too refined to fully absorb without backlash."

Noir's calm expression faltered for the first time. "Ah. That's troublesome."

The tendrils began siphoning his power, draining the energy he had been concealing.

Noir let out a sigh. "Well, I was holding back."

Then—his presence exploded.

A surge of pure darkness erupted from Noir's body, shattering the nameless demon's tendrils instantly. The devouring force of his skill was completely negated.

The nameless demon staggered back. "What—"

Noir vanished.

Then—pain.

A shadow-formed blade pierced his shoulder from behind. Noir had moved so fast that even with Sovereign of Shadows, he couldn't keep up.

Noir leaned in, whispering, "Your skills are dangerous. But you rely on them too much."

The nameless demon clenched his teeth, then activated his second skill in full.

The shadows around him distorted—then collapsed inward.

Noir's blade was suddenly absorbed into pure nothingness.

Sovereign of Shadows wasn't just about controlling darkness—it was about becoming one with it.

Noir pulled back, eyes gleaming with amusement. "Oh?"

The nameless demon stood up, his wounds already closing, his aura flaring. "Round two."

Noir grinned. "Now this is getting interesting."

Then—they clashed again.

The air trembled as Noir's power surged.

His crimson eyes burned like embers in the abyss, and the darkness around him coiled and writhed—no longer just an extension of his will, but a force that responded to his every thought. The battlefield itself became his domain.

"Lara, how much stronger is he getting?"

"Noir is now operating at approximately 60% of his full power. His illusions have gained increased tangibility, and his dark magic output has risen exponentially. He is still holding back."

The nameless demon exhaled sharply, flexing his fingers as he felt his body adapting. His muscles remembered every exchange, his instincts refined each reaction. His ultimate skills, Abyssal Devourer and Sovereign of Shadows, were not just tools—they were evolving as he fought.

And Noir had no idea.

Noir's lips curled into a smirk. "Let's step it up."

Then he vanished.

The nameless demon barely had a second to react before dozens of shadow-forged blades materialized around him, all aimed at vital points.

"Too slow."

The blades launched forward—but this time, he didn't just evade.

With a flicker of thought, Sovereign of Shadows activated, and the shadows cast by the blades stretched unnaturally, merging into his own. The moment they touched—they vanished, consumed into his abyssal domain.

Noir raised an eyebrow. "Interesting."

The nameless demon was already moving. Shadow-stepping through the battlefield, he closed the distance instantly.

A high-speed clash erupted—their fists colliding with enough force to crack the surrounding terrain.

The nameless demon's strikes grew sharper, faster. Every exchange refined him. His instincts adjusted, his reactions became more precise.

Noir noticed.

His smirk widened. "You're learning mid-battle? This is becoming fun."

Suddenly—Noir twisted his fingers.

The battlefield darkened.

A pulse of pure darkness exploded from him, spreading like a dome, cutting off all light. His *Domain of Shadows* was in full effect.

"Lara, status?"

"Your vision is blocked. However, your affinity with darkness is preventing complete sensory deprivation. Use Sovereign of Shadows to synchronize with the domain."

He did.

The moment he activated Sovereign of Shadows, he felt the battlefield. He didn't need sight.

He could sense every shift, every movement in the dark.

Noir struck from behind.

But this time, the nameless demon was ready.

He twisted mid-air, catching Noir's wrist, and absorbed a portion of his attack using Abyssal Devourer. The backlash burned through his body, but he endured it, redirecting the stolen energy into his counterattack—a devastating uppercut coated in abyssal flames.

**CRACK!**

Noir was sent flying for the first time.

Silence.

Then—laughter.

Noir stood, wiping his mouth, eyes gleaming. "I see. So you're not just keeping up. You're growing stronger mid-battle."

The nameless demon clenched his fists. "That's right."

Noir exhaled, rolling his shoulders.

"Good. Then I won't hold back anymore."

The temperature dropped. The darkness deepened.

And then—the real battle began.

The battlefield was in ruins.

Deep fissures cracked the ground, the air shimmered with residual magic, and the lingering clash of abyssal and dark energies created a pressure so intense that lesser demons in the vicinity had long since fled.

The nameless demon stood firm, breathing heavily, his body aching from the sheer force of the battle. But his mind was sharper than ever. Every second, he had been adapting, improving—each exchange refining his instincts.

Across from him, Noir remained calm, untouched by exhaustion.

However, his eyes gleamed with intrigue.

"Lara, status?"

"Your energy reserves are at 72%. Physical endurance is at 63%. Combat efficiency has increased by 41% since the start of the battle."

He clenched his fists. Even after all that, Noir was still stronger.

Then, without warning—Noir moved.

A blur of darkness.

He was right in front of him in an instant, faster than before.

"One last test." Noir whispered, his fingers barely raised—before everything collapsed into darkness.

The nameless demon had no time to react.

The world around him shifted, twisted—became an endless abyss. He couldn't see, couldn't sense direction—a perfect illusion woven into reality itself.

"Lara!"

"Illusion field detected. There is no spatial distortion—your body remains in place. Only your perception is altered."

He gritted his teeth. Noir's dark affinity wasn't just about raw power. It was about deception, control—overwhelming the mind itself.

But he wasn't defenseless.

Activating Sovereign of Shadows, he stretched his awareness into the very darkness surrounding him. Instead of resisting the illusion—he let it in.

Suddenly, he could feel Noir's presence.

There. Above.

Without hesitation, he dodged—just as Noir's blade of condensed darkness sliced down where he had been standing.

A close call.

Noir tilted his head. "Not bad. But…"

He raised a hand. The darkness tightened—and spears of pure black energy rained down.

Too many to evade.

So he didn't.

Instead—he devoured.

Abyssal Devourer activated, absorbing a fraction of the spears' energy before redirecting it into his own attack. An abyssal shockwave exploded outward, clearing the illusion for a split second.

He lunged, closing the gap—and struck Noir head-on.

A direct hit.

For the first time, Noir actually staggered.

Silence.

Then—laughter.

Noir exhaled, dusting off his coat as he stepped back. His red eyes, sharp like daggers, softened slightly.

"That's enough."

The nameless demon didn't lower his guard. "What?"

"You pass." Noir smirked. "You're strong. Very strong. But…" He raised a finger. "You lack experience."

The nameless demon tensed. He already knew that—but hearing it from Noir made it sting.

"Power alone isn't enough,"Noir continued. "Your instincts are sharp, your abilities terrifying—but you hesitate. You overthink. Against an enemy on my level, that's death."

The nameless demon clenched his fists.

"And what? You're just going to leave after saying that?"

Noir let out a low chuckle. "No. I've decided."

He stepped forward, his presence suddenly looming.

"You intrigue me. So, I'll teach you. I'll sharpen your skills, refine your instincts—until hesitation is erased from your being."

The nameless demon's eyes widened. "You're serious?"

Noir grinned. "Of course. Consider it my investment in our little lineage."

Silence stretched between them.

Then, slowly—the nameless demon smirked.

"Fine. Show me what you got."