The vault did not just tremble; it moaned, a deep tectonic groan that resonated from the roots of the mountain to the peaks above. Dust fell from the shattered ceiling in thick, gray curtains, coating the broken stone like ash, as the four-armed figure slowly turned toward Gojo and Megumi.
Akira's body stood there, but the soul behind the eyes had changed. The violet gaze was no longer human; it was a vast, ancient sea of indifference. The Abyss King moved one of his four hands slowly, rotating the wrist and flexing the fingers with a clinical curiosity. He was like an architect inspecting the structural integrity of a new, albeit fragile, monument.
"...Fragile," the King murmured, his voice a layered resonance of Akira's tenor and a bass that felt like shifting earth. "A vessel of glass trying to hold a mountain of lead."
Megumi felt his throat tighten, the air in the room suddenly too heavy to pull into his lungs. "Akira... fight him! Don't let him take the wheel!"
For a brief, flickering second, the violet in the eyes dimmed, and Akira's true voice whispered from the depths of the possession. "I'm trying... Megumi, it's... so dark in here..."
But the King smiled faintly, and the violet flared back to life, absolute and cold. He turned his attention to the man standing across from him.
Gojo Satoru stepped forward, his boots crunching on the obsidian shrapnel of the fallen Guardian. The air around him instantly became heavier as Infinity expanded, creating a localized pressure that smoothed the swirling dust into stillness. His blindfold shifted slightly as the Six Eyes ignited beneath the fabric, focusing on the four-armed form with a terrifying, mathematical precision.
"So," Gojo said, his voice deceptively casual. "The legendary King finally shows up in the flesh. I have to say, the four-arm look is a bit 'retro,' don't you think?"
The King looked at him, his four eyes blinking in a synchronized, haunting rhythm. "...The Six Eyes. The guardian of space. The man who thinks he has conquered the distance between points."
Gojo smiled, but there was no warmth in it. "And you must be the 'Abyss' everyone keeps whispering about. I usually don't like problems I can't see, but now that you're standing there... I'm still not impressed."
The King raised one of his upper arms, the movement so fluid it looked like a ripple in water. "Leave."
Gojo laughed, a sharp, barking sound. "Not happening. I'm a teacher. I don't leave my students behind, especially not with guests who don't know when to say goodbye."
For a moment, nothing moved. The universe itself seemed to pause, suspended in the breath between heartbeats. Then the King took one step forward.
The distance between them vanished. It wasn't that the King moved fast; it was that the distance was simply erased. One moment he was ten meters away; the next, he was standing in Gojo's shadow. Gojo's eyes widened slightly, a flicker of genuine surprise crossing his features.
"...You didn't move," Gojo noted.
The King's hand stopped inches from Gojo's face, hovering in the air. "I removed the space between us. I did not travel; I simply collapsed the 'Where' into the 'Here'."
Infinity reacted instantly. The invisible ocean of infinite distance stretched between them, a mathematical barrier that forced the King's hand to slow, then stall, and finally stop. Gojo's smile returned, sharper than before.
"Nice trick. But you're still playing in my playground, and in my playground, the finish line is always an infinite distance away."
The King's violet eyes narrowed. "You hide behind the concept of distance. You think you are safe because you are 'Far.' But what is Far... when there is nothing?"
The King lifted a second arm, his palm open. The air around Gojo suddenly twisted and groaned. It wasn't pushed by wind or pulled by gravity. It was Deleted. A thin crack of absolute emptiness—a literal void—appeared in the space between them.
"Sensei!" Megumi shouted, sensing the erasure.
Gojo's Infinity reacted again, the infinite layers of space unfolding like endless mirrors to fill the hole the King was tearing into reality. The crack could not reach Gojo's skin, but the walls behind them began to liquefy. Stone dissolved like hot wax as the clash of fundamental concepts—Infinite Space versus Absolute Nothingness—spread through the chamber.
Megumi staggered backward, shielding his face. "This isn't cursed energy! They're rewriting the laws of physics!"
Gojo raised his hand, his fingers twisting. "Cursed Technique Lapse: Blue."
A localized singularity of gravitational force erupted toward the King. The floor shattered as everything in the vault—rubble, dust, and steel—was pulled violently toward the center point. It was a force meant to crush the King into an atom.
The King simply raised two of his four arms in a cross. The gravity did not resist; it simply disappeared. Erased.
Gojo whistled, a lock of white hair falling over his blindfold. "...Okay, you're officially annoying."
The King finally stepped forward again. This time he didn't attack Gojo directly. He pointed at the space surrounding the Six Eyes and spoke a single, resonant word.
"Nothing."
For a moment, the world stopped. Megumi felt the air leave his lungs, his heart skipping a beat as the vault flickered like a dying lightbulb. The space around Gojo began to collapse into a pure, lightless vacuum. Infinity fought back, unfolding layers of space at a rate that would have exhausted any other sorcerer in seconds.
The collision warped the entire chamber. Walls twisted into spirals. Pillars bent like rubber. The mountain groaned above them, the structural integrity of the peak failing under the weight of the battle.
Gojo's smile faded slightly, his jaw tightening. "...You're trying to erase the concept of space itself to bypass my Infinity."
The King nodded, his four eyes fixed on Gojo. "And you hide inside the multiplication of space. If I remove the foundation of your world, your 'Infinite' has nowhere to exist. Let us test which concept is more absolute."
Gojo cracked his neck, his aura flaring until the violet electricity of the King was pushed back to the edges of the room. "Alright. You want to play with the big toys? Let's play."
He lifted both hands. Red energy began forming in his right palm—the power to repel. Blue energy formed in his left—the power to attract.
Megumi's eyes widened in horror. "Sensei... don't tell me you're using that in here!"
Gojo grinned, a wild, lethal light in his eyes. "Oh yeah. This is a special occasion."
The two forces merged. Reality screamed as the laws of the universe were violated.
"Imaginary Technique: Hollow Purple."
A beam of impossible, non-existent energy erupted across the vault. It was a sphere of pure destruction that erased everything in its path. Stone, air, and even light were deleted by its passage. The beam slammed directly into the King's chest, the explosion ripping through the chamber and blasting out the back of the mountain into the fracture behind him.
Megumi shielded his eyes as a shockwave of purple light blinded him. "Did it hit him?!"
The dust slowly cleared, revealing a path of total annihilation. The King was still standing. One of his upper arms was gone, and a large portion of his torso had been hollowed out.
But the wound was already rebuilding itself. Shadows flowed like thick, dark liquid, weaving into muscle and skin. Gojo blinked, his hand dropping.
"...Okay, that was definitely supposed to hurt more. You're cheating."
The King studied the missing limb calmly as it reformed in seconds. "...Interesting. Your technique erases matter. It is a powerful tool of the physical world." He looked at Gojo with a terrifying clarity. "But I erase the Probability of existence. I am the Void that existed before your 'Purple' was a spark in a sorcerer's mind."
The air around Gojo twisted violently again. The King moved faster now—not physically, but conceptually. The space between them vanished once more, and this time, the King appeared directly in front of Gojo.
His hand touched Gojo's Infinity.
For the first time in history, the Infinity barrier trembled.
Gojo's smile disappeared completely. The Six Eyes were screaming a warning. "...That's new."
The King whispered quietly, his voice vibrating in Gojo's chest. "I am not pushing against your space. I am removing the very possibility of the space you are trying to multiply. Your 'Infinite' is becoming 'Zero'."
Megumi's heart stopped. "Sensei!"
Gojo pushed his power to its absolute limit, sweat finally appearing on his brow. Infinite layers of space expanded endlessly, a recursive loop of distance. But the King kept deleting them, layer by layer, a battle of cosmic mathematics. The entire vault began collapsing, boulders the size of cars falling from the ceiling.
Megumi screamed over the roar of the mountain. "THE MOUNTAIN IS FALLING! WE'RE GOING TO BE BURIED!"
Gojo suddenly laughed. A real, genuine laugh of exhilaration. "...You know what, King? I take it back. You're not just a problem." His voice became sharp, excited. "This is the most fun I've had in years! I forgot what it felt like to actually have to try!"
Then Gojo removed his blindfold completely.
The Six Eyes ignited with a terrifying, celestial light, turning the dark vault into a place of blinding blue brilliance. The pressure in the chamber multiplied instantly, forcing the King back an inch. Megumi froze, unable to move a single muscle.
"He's serious now," Megumi whispered.
Gojo stepped forward, the ground beneath him turning to dust. "Let's take this somewhere bigger. I'd hate to ruin the scenery of the kid's favorite spot."
The King's eyes narrowed. "...You think changing the battlefield matters to a Sovereign of the Abyss?"
Gojo smiled, his fingers snapping together. "No. I just don't want to destroy the city the kid loves. It would be a bad look for a teacher."
Space shattered. The battlefield warped violently, the stone walls of the vault dissolving into a blur of light and speed. The King's eyes widened slightly as the transition hit him. "...Teleportation? On this scale?"
"Welcome to round two," Gojo's voice echoed.
The world exploded into light. When the brightness faded, they were no longer inside the mountain. They were standing high above the peaks of Imouzzer Kandar. The cold night air of Morocco rushed past them, and the vast, starlit sky stretched endlessly above.
The King looked around slowly, seeing the lights of the city far below. "...So this is what the vessel wanted to protect. A collection of mud and lights."
Gojo floated in the air across from him, his blue aura expanding like a silent ocean. "Yep. It's a nice city. And I'm going to make sure it's still here when Akira wakes up."
The wind howled across the mountains. Two sovereigns faced each other in the moonlight. Space versus Nothing. Infinity versus the Abyss.
And far below, in the lightless depths of Akira's consciousness, the boy finally found his voice and screamed.
"STOP USING MY BODY!"
The King smiled slightly, his four arms reaching out to grasp the air. "...No. The show is just beginning."
And then—the sky itself cracked.