Nyx stood in the vast stillness of the Aether Realm, his chest rising and falling in slow, measured breaths as he faced the creature once again. The strange world around him remained unchanged, its sky swirling endlessly with unnatural colors while the ground beneath his feet pulsed faintly like something alive. Yet despite the stillness of the environment, the tension in the air was unmistakable. It pressed down on him just as heavily as the invisible force that had never left his body since he arrived.
But something else had changed.
He could feel it clearly now.
His body was heavier than before, not because the pressure had increased, but because whatever strength he had drawn out earlier was fading. The sharp edge he had felt during those moments of power had dulled, replaced by a slow, creeping exhaustion that settled deep into his muscles. His arms felt slower. His legs less responsive. Even his breathing had grown more labored, each inhale dragging against his chest like it had weight of its own.
Nyx lowered his gaze slightly, studying his hands.
The dark cracks that had once spread across his skin were gone again. Not faded gradually, but disappeared as if they had never been there. Yet he could still feel something beneath the surface. A faint trace. A lingering presence. The pulse.
It was still there.
But weaker.
"...So it doesn't last," he murmured quietly to himself.
The realization settled heavily in his mind. That power, whatever it was, wasn't something he could rely on indefinitely. It came suddenly, violently even, but it left just as quickly. And when it did, it took something from him in return.
Energy. Strength. Control.
Maybe all three.
Nyx exhaled slowly, steadying himself.
Then the creature moved.
It didn't charge forward like before. Instead, its form flickered once, then vanished completely from where it stood. Nyx's eyes sharpened instantly, his body reacting on instinct as he twisted to the side. The attack came a fraction of a second later, slicing through the space where he had been standing. The air itself seemed to tear apart under the force of the strike, leaving behind a faint distortion that lingered for just a moment before fading.
Nyx barely avoided it.
His foot slid against the ground as he regained his balance, but the moment he moved, the pressure surged in response. It slammed into him from all directions, as if punishing him for trying to evade. His body staggered under the weight, his movements slowing just enough to put him at risk.
Too slow.
The creature followed up immediately.
Its second strike came from below, fast and unpredictable. Nyx raised his arm to block, but this time, the cracks didn't flare the way they had before. They flickered weakly, barely responding.
The impact hit him hard.
The force drove him backward, his feet dragging across the ground as he struggled to stay upright. Pain shot through his arm, not from injury but from the strain of resisting the blow. His muscles tightened, his body resisting the urge to collapse.
He held.
But only just.
Nyx clenched his teeth, forcing himself to push forward instead of retreating. His body protested instantly, every movement feeling heavier than the last, but he didn't stop.
"Not enough…" he muttered under his breath.
The creature didn't hesitate.
It pressed forward relentlessly, its attacks becoming faster, more aggressive. Its movements were chaotic, but there was a pattern hidden beneath the madness. Nyx could feel it now, faint but present.
The next strike came from the side.
Nyx tried to dodge.
Too late.
The creature's claw grazed his shoulder, tearing through his clothing and drawing a sharp line of pain across his skin. Warmth followed immediately as blood began to seep through.
Nyx staggered slightly.
But he didn't react the way he would have before.
He didn't panic.
He didn't hesitate.
Instead, he focused.
"...Think," he whispered.
Brute force wasn't going to win this fight.
Not anymore.
That power he had briefly touched… it wasn't reliable yet. It came with limits, and he had already reached them. If he continued to rely on it blindly, he would lose.
So he changed.
Nyx steadied his breathing, forcing it into a slower rhythm despite the strain on his body. His eyes remained locked on the creature, watching its movements carefully now.
Not reacting.
Observing.
The creature lunged again.
This time, Nyx didn't rush to move.
He waited.
Just a fraction longer than before.
Then he stepped to the side.
Clean.
Precise.
The attack missed completely.
Nyx stepped forward immediately.
No hesitation.
His fist connected with the creature's side.
The impact was weaker than before, lacking the distortion that had accompanied his earlier strikes, but it was solid. Controlled. Enough to disrupt the creature's balance.
It staggered.
Nyx didn't stop.
He followed up with another strike.
Then another.
Each hit measured. Each movement deliberate.
He wasn't trying to overpower it anymore.
He was trying to outlast it.
The creature retaliated.
Nyx blocked again, barely managing to hold his ground as the force pushed him backward. His muscles screamed under the strain, his breathing growing heavier with each passing second.
But he didn't fall.
Not this time.
"I don't need power to fight," he said quietly, almost to himself.
"I just need to last longer."
The words weren't for confidence.
They were a decision.
The creature attacked again.
Nyx stepped forward.
Not back.
Forward.
Their attacks collided, the impact echoing across the empty space of the Aether Realm. For a brief moment, everything seemed to freeze.
Then something changed.
Cracks spread across the creature's body.
Nyx's eyes narrowed slightly.
He saw it clearly now.
The creature wasn't perfect.
It wasn't limitless.
Just like him… it had its own instability.
"So you're breaking too," he murmured.
The creature staggered, its form flickering more violently than before. Its body struggled to hold itself together, the cracks spreading further with each passing second.
Nyx didn't chase.
He couldn't.
His body was already at its limit.
Instead, he stood there, breathing heavily, watching.
Waiting.
The creature twitched once more.
Then—
It vanished.
Not retreating.
Not escaping.
Just… gone.
As if it had never existed in the first place.
The pressure remained.
The silence returned.
Nyx stood alone once more.
For a moment, he didn't move.
Then his body finally gave out.
He dropped to his knees, his strength completely drained. His breathing became uneven again, his muscles refusing to respond the way they had moments ago.
"...Tch…"
He lowered his head slightly, his vision unfocused.
But his mind…
Was clear.
"So that's the price," he said quietly.
Power wasn't free.
It never had been.
And whatever he had awakened inside himself… it demanded something in return.
If he used too much, too fast…
It would leave him empty.
Nyx looked down at his hands again.
The cracks were gone.
But he could still feel that faint pulse deep within him.
Weak.
Distant.
But still there.
"Good," he muttered.
A faint smile formed on his lips.
"That means it's mine."
He slowly lowered himself to the ground, not collapsing this time, but sitting. Resting.
Because now he understood something important.
Strength alone wasn't enough.
Control mattered.
Endurance mattered.
Awareness mattered.
And limits…
Limits existed for a reason.
But that didn't mean they couldn't be broken.
Nyx closed his eyes slowly, his breathing beginning to stabilize.
"Next time… I won't run out."
In the distance, the Aetherborn watched in silence.
They did not interfere.
They did not guide.
But they observed.
"He adapts," one of them said quietly.
"Faster than expected."
"And he learns," another replied.
"That is why he survives."
Nyx didn't hear them.
But deep within him…
That faint pulse answered once more.
Not strong.
Not yet.
But steady.