The moment Ren took his first step forward, the world inside the Black Blade responded.
The ground beneath him—if it could even be called ground—rippled like liquid shadow, spreading outward in slow, distorted waves. Every breath he drew felt heavier, denser, as though the air itself resisted his existence. Pressure pressed down on his chest, crawled across his skin, and seeped into his bones. Yet Ren did not slow. He did not hesitate.
His torn clothes fluttered violently in an unseen wind, strips of fabric snapping like banners caught in a storm. Blood streaked across his arms and face, glowing faintly as his aura pulsed—dark, volatile, and endlessly rising. It wrapped around him like a second skin, alive and restless, refusing to settle.
Across from him, Emma no Kage stood tall.
The demon’s form was wreathed in drifting embers of black and crimson, fragments of ash orbiting his body like dying stars. His presence alone distorted the void around him, bending shadow and space alike. Slowly, deliberately, his lips curled upward.
It was not mockery.
It was excitement.
“Yes,” Emma no Kage said softly, almost reverently. “That look… I have not seen it in centuries.”
Ren did not answer.
His eyes burned with quiet fury—focused, sharp, unwavering. There was no confusion in them now, no doubt. Only resolve and rage, balanced on the edge of something far more dangerous. Each step he took sent a tremor through the void, cracks spider-webbing outward as his aura swelled like a storm straining against invisible restraints.
Emma no Kage spread his arms wide, welcoming the pressure.
“Do you feel it?” he asked. “That force tearing you apart… and rebuilding you at the same time?”
Ren clenched his fists.
The aura surged.
The void screamed.
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Emma no Kage laughed—deep, rich, and endless. The sound echoed through the Black Blade’s domain, reverberating off unseen walls and folding back on itself.
“You truly are a special case, Ren Kurogane,” he said. “Very well.”
His eyes flared.
“Let me show you why they once called me the **King of Ashen**.”
The darkness behind him split open like a festering wound.
From it poured an army.
A thousand demon spirits erupted into existence—twisted, malformed shapes born of smoke, bone, and fire. Their bodies dragged across the void, limbs scraping, jaws snapping. Some crawled, others flew, others simply phased into being, screaming with hunger and madness. Their shrieks layered together into a deafening chorus that clawed at Ren’s mind.
They rushed him all at once.
And then—
They stopped.
An invisible force slammed into them, halting their advance as though they had struck an unbreakable wall. Their bodies trembled violently, cracks spreading across their forms as Ren’s aura expanded outward in a crushing pulse.
The demons screamed louder.
They strained forward.
They couldn’t move.
Ren stood at the center of it all, unmoving, unshaken. His aura roared like a living entity, surging higher with every heartbeat. Each pulse crushed the demon spirits further, grinding them down beneath its overwhelming pressure.
Emma no Kage’s eyes gleamed with fascination.
“Incredible,” he murmured. “They can’t even approach you.”
Ren moved.
In an instant, he vanished.
One moment he stood perfectly still—the next, the demon at the front of the horde exploded into ash. Before the sound could fade, another spirit was torn apart. Then another. Ren reappeared only for fractions of a second, flickering through space itself, his movements faster than perception.
He was no longer running.
He was **phasing**.
Each strike was clean. Precise. Merciless.
Demons fell by the dozens, erased before they could even react. Ren’s reflexes surpassed human limits, his body moving purely on instinct, guided by rage sharpened into terrifying clarity.
Emma no Kage watched, utterly enthralled.
“Yes… yes!” he shouted. “That speed! Those strikes! You’re shedding hesitation!”
Ren reappeared high above the battlefield, aura flaring violently, dark lightning crawling across his form. For a brief moment, he hung there—then descended like a falling star.
The remaining demons were erased in a single, devastating wave of power.
Silence followed.
Ash drifted slowly through the void.
Emma no Kage stepped forward.
The darkness condensed around him, forming weapons of shadow and flame that pulsed with ancient power. With each step, the void distorted further, bending beneath his presence.
“So,” he said calmly, “let’s see how you fare against **me**.”
They collided.
The impact sent a shockwave ripping through the void, fractures spreading like shattered glass. Ren was flung backward—only to twist midair, land cleanly, and skid to a stop. Emma no Kage was already there, striking again with overwhelming force.
Ren blocked.
The force rattled his bones, tore through his muscles, but he did not fall.
They exchanged blows faster than sound. Each strike warped reality. Each clash birthed ripples of destruction. Ren’s aura climbed higher and higher, feeding on motion, on resistance, on rage.
He grew faster.
Stronger.
Relentless.
Emma no Kage’s smile slowly faded—not into fear, but into something far rarer.
Respect.
“You’re surpassing yourself,” the demon admitted, staggering as Ren’s strike broke through his defense. “Do you even realize what you’re becoming?”
Ren appeared behind him.
Another blow sent Emma no Kage to one knee.
The void trembled violently now, fractures racing across the darkness. Ren stood before the kneeling demon, his aura towering, wild and untamed.
Emma no Kage looked up at him—
And smiled.
Magnificent.
“To think,” he said breathlessly, “a human would push me this far.”
Ren stepped closer.
Emma no Kage’s smile widened.
“You see it now, don’t you?” he whispered. “We are alike.”
Ren stopped.
For a moment, everything went still.
Then—
The void shattered.
