A faint haze of purple lingered in the sky as the planet's twin suns dipped below the horizon, their dying light washing the rocky plateau in a surreal glow. Gojo Satoru closed his eyes behind his blindfold, letting the cool evening air soothe his sweat-soaked skin. Across the far side of the plateau, Launch—currently in her docile, purple-haired form—leaned against a boulder, watching him intently. She'd long given up any attempt to keep pace with his training, but she remained ever watchful, ready to intervene if one of his insane exercises veered into true danger.
The hush of twilight set the perfect stage for Gojo's final training session of the day. For months, he had refined the rapid toggling of Infinity and cursed energy activation—an erratic, high-stakes method that forced his reflexes and cursed energy control to evolve. He had discovered that surprising bursts of cursed energy, unleashed at the precise microsecond his Infinity switched states, produced shockwaves or gravitational distortions far beyond anything he could muster through standard means.
At first, these sudden bursts had been accidental, clumsy surges that left him drained and battered. But over time, with Six Eyes granting him perfect real-time analysis, and the Eternal Flame fueling his resilience, he'd come to see a pattern—a window of opportunity that let him amplify Blue, Red, or even Hollow Purple in ways he never expected. It reminded him of Black Flash, that legendary, momentary synergy between negative energy and physical impact. Except in his case, it involved Infinity, reversed cursed energy, and a cosmic spark.
He exhaled, letting his senses expand. With Six Eyes active, the entire plateau became a tapestry of swirling energies—gravity pockets, dust-laden breezes, faint negative aura pockets. He could see them as lines of coded flow. Another breath, and he felt the Eternal Flame stir in his core, an ember that flared in time with his heartbeat. He'd harness that flame, let it collide with the brief intervals of Infinity toggling, and see if he could push beyond the usual constraints.
In one fluid motion, he raised his right hand. A swirl of intangible force rippled across his knuckles—Blue, the gravitational pull effect. He let it form slowly, stable, a small orb that shimmered like a condensed black hole. Then, with a snap of his left hand, he conjured Red, the destructive, repulsive sphere in the other palm. The air around him crackled, dust and pebbles trembling under the competing gravitational fields. Launch, at a safe distance, crouched and braced herself for the shockwaves that inevitably came when he toyed with these extremes.
Now came the key: toggling Infinity. He flicked it off for just a fraction of a second—a sliver of time so brief that even his own reflexes barely registered it. In that tiny window, the swirling cursed energy in each orb wavered, like a wave forced to crest. Then he slammed Infinity back on, feeding a jolt of reversed cursed energy from his Reversed Cursed Technique. The Eternal Flame danced, fueling the negativity of each sphere.
Something sparked: a crackle of black lightning traced across the surface of both Blue and Red. Gojo's heart pounded as he seized that spark, controlling it with millisecond precision. With a sharp exhale, he crashed the negative surge into the swirling orbs. Where usually Blue stayed a deep azure and Red glowed crimson, a black sheen suddenly slicked across them, their edges crackling with dark arcs.
Launch gasped from her vantage point. Even in her gentler form, she could sense the raw spike of power. It was as if space itself briefly contorted, intensifying the gravity well of Blue and the explosive force of Red at the same time.
"Let's see if this is real or just a fluke," Gojo thought, excitement coursing through him. He thrust his right hand forward, letting Blue—now tinged black—pulse outward in a condensed wave. The gravitational pull tore through the plateau, shredding boulders and dragging them violently into the orb. But as the rocks neared that blackened core, they disintegrated instantly, as though some additional destructive factor had joined the usual gravitational crush.
He whipped his left hand around, unleashing Red, similarly layered with that black lightning. A conical wave of repulsion slammed into the remains of the boulders, causing them to explode outwards in a far wider area than normal. The aftershock buffeted the entire plateau. Launch stumbled back, eyes wide, arms flung up to shield her face from flying debris.
Heart racing, Gojo let the orbs dissipate, panting from the exertion. This technique was more than just Blue or Red amplified. It was as if he'd discovered a "fourth color" to his arsenal, a black-tinted enhancer that made each technique exponentially more potent—for a fleeting moment. But how stable was it?
He turned quickly to Launch. "You okay?"
She lowered her arms, face coated in dust. "Yeah," she coughed. "What the hell did you do?"
Gojo let out a breathy laugh, running a hand through his damp hair. "Not entirely sure. Some sort of synergy, like a 'Black' version of my normal attacks. I, uh… might need to test that more carefully."
Launch glanced at the devastated stretch of land. Entire rock formations had been annihilated in seconds. "Carefully, right," she said wryly. "You nearly took out half the plateau with that. But it looked… impressive."
Gojo nodded, grin expanding. "I think I can do it with Hollow Purple too."
She groaned. "Why am I not surprised?"
But she didn't stop him when he braced himself for another attempt. Summoning Blue in one hand, Red in the other, he let them coalesce into the swirling wave of annihilation known as Hollow Purple. The violent purple swirl formed at chest level, warping space around it. Under normal circumstances, Hollow Purple was already a near-ultimate move—capable of erasing anything it touched by merging repulsion and attraction. Now, if he could replicate that black flash synergy…
He repeated the process: a micro toggle of Infinity, the infusion of reversed cursed energy, the Eternal Flame stoked to an intense flicker. The swirl of purple flickered, arcs of black energy lancing across it. A hairline crackle of dark lightning veined the edges, turning the entire sphere a deeper, more ominous hue.
"This is it," he thought. "Black Purple."
Before letting it loose, he took a moment to focus with the Six Eyes. His advanced perception showed a significant spike in negative cursed energy, far beyond the normal threshold. If he unleashed this carelessly, it might tear open an irreversible rift. "Gotta aim it," he murmured.
He tilted his hands upward, sending the newly created Black Purple wave into the sky. A thunderous explosion erupted, illuminating the twilight with a brilliant, dark-tinged flash. For a moment, it was as if a piece of the night sky had been torn free and flung upward, scattering dust and clouds for miles around.
Launch clung to the boulder, hair whipping in the shockwave. The thunderous roar subsided, leaving behind a starlit sky where the dust parted in a wide radius, revealing the stars overhead more vividly than ever. Gojo stood, arms lowered, chest heaving, sweat drenching his clothes.
He felt drained—far more so than after typical Hollow Purple usage. Whatever this "Black" synergy was, it required a monumental surge of cursed energy, reversed flow, Infinity toggling, and that ephemeral push from the Eternal Flame. It was unsustainable as a spammable technique, yet the raw destructive force was immeasurable.
"Holy—" Launch's voice cracked as she approached, purple hair a tangled mess. "I've never seen anything like that. Was that… safe?"
Gojo let out an exhausted laugh, hands on his knees. "Probably not. But I had to see if it was possible."
She offered him her arm, helping him stay upright. "You look like you're about to keel over."
Nodding weakly, he drew on Reversed Cursed Technique just enough to stabilize his fatigued body. "That took a lot out of me. But it worked."
They trudged back across the ravaged plateau toward their camp. En route, Gojo gave Launch a more thorough explanation of the process: how toggling Infinity at the precise microsecond of Blue, Red, or Purple's formation let him insert an extra surge of negative energy—augmented by the Eternal Flame's cosmic spark. This collision produced a short-lived "Black" phenomenon that hyper-amplified whichever technique it touched, akin to the principle behind Black Flash in standard cursed energy usage.
Unlike standard Black Flash, though, which relied on timing an impact within a 0.000001-second window, Gojo's "Black" used toggled Infinity states and reversed cursed energy infusion, so the synergy was purely an external phenomenon rather than a strike-based one. That made it harder to replicate but also capable of devastating results on a wide scale.
"I'm calling it Black," he told Launch, leaning against the side of the camper as they arrived. The battered vehicle looked downright cozy compared to the cratered wasteland behind them. "Basically, it merges that erratic negativity with Infinity in a flash—like a black lightning effect that I can apply to Blue, Red, or Hollow Purple."
Launch peeled off one dusty glove, eyeing him up and down. "This is why you've been toggling Infinity on and off all month? I thought you were just trying to drive yourself insane."
He smirked, dabbing sweat from his forehead with the back of his hand. "A bit insane, maybe. But it paid off."
She crossed her arms, purple eyes narrowing with concern. "You realize it's also dangerous, right? You looked pretty drained after just two tries. If you push yourself too hard in a real fight…"
"I know," he conceded. "But having that ace in the hole is better than not having it, especially if we run into someone on Whis's level again." He paused, a flicker of humility in his gaze. "Well, maybe not Whis specifically, but… you never know what's out there."
Launch gave a reluctant nod. "Guess so. Just don't blow yourself up in the process. One cataclysmic explosion is enough for a lifetime."
He chuckled, leaning back against the camper. "Relax, I'll only use Black when absolutely necessary. If nothing else, this training taught me to measure risk carefully."
She couldn't quite argue with that. Gojo's entire demeanor had shifted since their earliest travels. He still wore that cocky grin, but a sharper wisdom underpinned it—a gleaning from near-catastrophic attempts at tapping cosmic forces. "Well," she finally said, softening her tone, "I'm proud of you, I guess."
He raised an eyebrow behind the blindfold, but a warm smile curved his lips. "Thanks, Launch. Couldn't have done it without you forcing me to eat and sleep."
A little blush colored her cheeks. "Somebody's gotta keep you alive."
Night fell fully, revealing a canopy of stars unobstructed by dust clouds. The radiant swirl of the galaxy overhead felt like a silent audience to Gojo's achievements, as if this alien world bore witness to his creation of Black. Exhausted but satisfied, Gojo followed Launch into the camper, letting the hum of the small heater and the familiarity of their cramped living space soothe him.
Over a spartan dinner of rehydrated noodles, they discussed the technicalities: how to gauge the intervals of Infinity toggling, how many times he could reasonably attempt Black in one day without collapsing, and whether or not the Eternal Flame had deeper synergy to offer. The conversation was equal parts cautious and thrilled—each day in this Universe proved there were infinite rungs on the ladder of power, and Gojo just conquered another rung.
As Launch yawned and stretched, heading to her bunk, Gojo settled on a small mat near the camper's door. He wanted to do a quick mental run-through of the day's breakthroughs before sleeping. Summoning a tiny sphere of Blue, he toggled Infinity once, letting a minuscule flicker of Black crackle across it before he snuffed it out.
"That's enough for now," he told himself, chuckling at how addictive discovery could be. "Tomorrow, I'll refine it more."
He closed his eyes, letting the synergy of reversed cursed energy heal the residual aches in his muscles. The Eternal Flame pulsed gently in his core, a warm companion rather than a raging fire. His Six Eyes dimmed as he drifted toward rest, content in the knowledge that he'd carved a new page in his own legacy.
Yes, Black was dangerous, draining, and full of risk. But it was his. And in a Universe where even gods roamed freely, forging a technique that transcended his old boundaries felt like exactly the step he needed.
He let the planet's tranquil night lull him to sleep, mind already dancing with possibilities of the next day's training. He'd see how far he could push Black, how elegantly he could merge it with the rest of his arsenal. Because in a cosmos of boundless wonders, the path to mastery was endless—and Gojo Satoru had never been more eager to keep climbing.