But it wasn't finished.
The blade caught, wedged in its throat for one fraction of a second—and before Aron could pull back, an iron hand shot up and closed around his forearm hard enough to grind bone.
"You're still not done...?"
The grip tightened, threatening to snap the joint. Cracks spread across the Knight's armor now, not from Aron's blade but from something unstable building inside its own core, some pressure with nowhere left to go. Its hollow gaze locked onto him.
It pushed back. The blade inched out of its throat, and Aron's boots slid across broken stone.
"...You're still standing?"
The shadow energy around his arms clenched tight in answer, refusing to yield with him. He dug in and pressed forward.
"No."
"I wasn't faster than you."
"Your blade just didn't reach me in time."
No hesitation left in him now. He drove deeper into the strike, forcing the blade past the throat and straight into the center of its chest, pouring everything he had left into the steel.
The Knight surged back, dark flame roaring brighter than it ever had, refusing to go quietly.
"Unbreakable Oath—activate!" Aron roared.
The skill detonated. The blade buried itself fully in the chest cavity, and this time it didn't stop. White fractures split across the armor, spiderwebbing outward under the pressure building beneath the surface.
The stronger his resolve burned, the heavier the payload behind the strike became.
"Now—FALL!"
The force compressed inward, then tore outward all at once. The armor cracked, split, and burst apart in pieces as the energy ripped through it from the inside.
The dark flames didn't die.
They surged.
For one horrifying second, they compressed instead of scattering. The armor kept crumbling apart—and the Knight took a step forward anyway.
Then another.
Its chest core was gone. Half its body had already turned to ash and drifted off into the dark.
It kept coming.
One. Two. Three steps.
Blue flame poured from every crack in the wreckage like blood from a wound that should have already killed it.
"...What the hell..."
Aron's pupils shrank.
The thing was already dead.
And it was still walking toward Zekai.
Not him.
Zekai.
Like whatever outcome it had been sent to deliver still hadn't been fulfilled yet, and death wasn't going to get in the way of finishing the job.
Its broken arm shot forward.
CRACK.
Iron fingers clamped around Aron's shoulder, the force nearly tearing it out of the socket.
"AAGHH—!"
He screamed.
The creature's body was collapsing in real time. Its armor was turning to ash between one second and the next. Its core didn't exist anymore.
And still its grip tightened, like inevitability itself refused to accept that this was over.
For the first time, the King Knight actually looked at him.
Not past him. Not through him like he was furniture in the way.
At him.
The blue flame guttered weakly behind its shattered helmet.
"...So it wasn't you who was supposed to die."
Aron's eyes went wide.
The grip tightened again, like something had finally clicked into place inside whatever passed for its mind.
"...The outcome changed."
For the first time since Aron had met it, the King Knight sounded uncertain.
The blue flame surged inward, collapsing toward the ruined chest cavity—compressing, condensing, folding down into a single burning point.
Every instinct in Aron's body screamed at once.
Danger. Absolute, immediate danger.
He didn't think. He just shoved the sword in deeper.
"STAY DOWN!"
The last fragments of the Knight cracked apart around the blade.
For one breathless moment, it went completely still.
Then—
BOOOOOOOOM!!
The compressed flame detonated outward in a wall of light and force, and the blast swallowed both of them whole.
Something inside Aron's body gave way as the shockwave hurled him across the hall. Stone walls buckled. Ancient pillars folded and collapsed in slow, grinding avalanches of rock. His body bounced off the floor twice before slamming into a pile of rubble and going still.
Silence swallowed everything.
The blue flame scattered into the air and thinned into nothing.
This time, the King Knight did not get back up.
The dark fire flickered, sputtered, and died as the last of its core gave out.
Quiet.
For a long, unbearable second, nothing moved at all. Aron's hands were still shaking even after the monster had turned to dust in front of him. His breath came a full second behind his heartbeat, slow, heavy, like his body had forgotten how to keep pace with itself.
His grip failed. The sword hit the stone with a dull clatter. His body hadn't caught up to the fact that the fight was actually over. He didn't feel stronger. He just felt harder to break than he used to be.
"...Huh?"
The world didn't reset. The air didn't rewind. Time didn't snap back to the start of the loop.
This time, the one lying broken on the ground was the King Knight.
[ ENTITY STATUS: TERMINATED ]
[ Target: King Knight ]
[ Classification: Enforcer ]
[ SYSTEM: AREA CLEARANCE CONFIRMED. ]
It hadn't adapted this time. It hadn't failed to land the killing blow.
Aron simply hadn't died.
The second the tension drained out of his nerves, whatever strength had been holding him upright went with it. He dropped to one knee, catching himself on both hands before his face could meet the stone.
"This... this is the biggest thing I've ever done in my life," he wheezed. Blood streaked his face, and underneath it, a real smile broke through, tired and disbelieving. "Finally. It's over."
The reality layer didn't reset. The room didn't rewind its coordinates. The timeline held.
He turned his head slowly toward Zekai, a quiet, overwhelming relief flooding through his chest, warm enough to almost drown out the pain.
"All of this... was for you, Mr. Zekai."
The last trace of blue flame flickered once in the wreckage.
Then it vanished completely, like whatever future it had been reaching for simply stopped existing.
Thud. Thud. Thud.
Something heavy echoed out of the dark corridor behind him.
Aron froze. He turned his head, the color draining out of his face as the air in the hall shifted into something far heavier than anything the King Knight had brought with it.
And for the second time that night, real fear came crawling back in.
✦ End of Chapter 16 — Who was supposed to die? ✦