A week later, a desolate island somewhere in the Pacific.
The place felt forsaken by time. Jagged, charcoal-gray rock formations dominated the landscape, some spearing towards the sky like broken teeth, others slumped like petrified giants. A coarse black sand beach met a turbulent, gunmetal sea, the air thick with salt spray and the roar of crashing waves. Inland, a barren stone valley lay cupped by sheer cliffs, a silent, lifeless bowl of dust and rock.
As the group of six materialized via Geto's curse-transport, Gojo Satoru's nose wrinkled. "This is the venue you picked? It's a dump."
"Welcome," Kamo Itsuki said with a sweeping gesture, "to Jishi Island."
Besides the two combatants, their party included Geto Suguru (officiating), Ieiri Shoko (medical standby), and Mimiko and Nanako (eager spectators).
"It has a name? Fitting," Geto remarked, eyeing the stark scenery.
"I named it. It's mine."
"Yours?" Shoko blinked. "Since when do you own an island?"
Kamo laughed. "For that, I have to thank Satoru."
"Me?" Gojo looked genuinely baffled.
"Remember our little… wager? When we were six?" Kamo's eyes crinkled at the memory. The one where everyone bet on Gojo, and Kamo cleaned house.
With a fraction of his winnings—barely pocket change from the total—he'd treated everyone to a feast. The rest? He'd stumbled upon an auction for remote, worthless islands. Seeing potential, he'd bought three. Jishi Island was one; another housed his cursed corpse research lab. This rocky husk had become his personal testing ground for volatile techniques and barrier experiments.
Gojo's expression soured as he connected the dots. His lost allowance had bought this bleak rock. "If I don't sink this whole place by the end of today, I'm considering it a loss," he muttered to himself.
"But don't judge a book by its cover," Kamo said, his tone shifting to one of sly anticipation. "What you see now… isn't all there is."
He led them to a low, reinforced structure built into the northeast cliffs—his research outpost.
"The island is prepared. I've deployed the barrier we discussed. Satoru, you may choose the battlefield."
"Choose? It's a rock. There's the rock valley, the rocky beach, the rocky hills…"
"What you see is the island's default state," Kamo corrected, a patient teacher before a skeptical class. He gestured to a complex control array inside the bunker. "The barrier I created—the one designed to withstand internal cataclysm—is already active. Its original purpose was to create a safe 'exorcism arena.' But its parameters are… flexible."
His fingers hovered over a series of etched seals. "It can reconfigure the internal topography. Simulate environments. So choose. A dense urban labyrinth? An endless frozen plain? A forest of crystal?" He looked at Gojo, his earlier playfulness gone, replaced by the serene focus of a duelist. "Name your stage. The barrier will render it. This island is the canvas. Our fight will be the brush."
The barren rock around them suddenly seemed less like a limitation and more like a blank page, awaiting a violence so great it would demand its own world.
Kamo had designed the system with meticulous fairness in mind. Different sorcerers—and curses—thrived or faltered in specific environments. A slight terrain advantage could tip the scales. Thus, his super-barrier wasn't just a container; it was a stage director, capable of rendering any environment in perfect, tactile detail. After the battle, a simple reset would erase all damage, leaving the barren island untouched, as if the cataclysm within had never happened.
At Kamo's prompting, Gojo called up the selection interface. A holographic display shimmered to life, listing categories: Plains, Mountains, Forests, Deserts, Tundra, Swamps, Ocean, Urban, and more.
Gojo skimmed the descriptions. A mountain map, for instance, promised uneven terrain, high peaks, and deep valleys—factors that could hinder movement and sightlines. His finger hovered, then tapped Mountains.
A sub-menu unfolded, a geographer's dream. Kamo had included virtually every famous range on the planet: the Himalayas, the Alps, the Andes, the Kunlun, and Japan's own iconic Mount Fuji.
Gojo's lips quirked. If they were going to tear a place apart, it might as well be scenic. He selected *Mount Fuji*.
He understood Kamo's gambit. By ceding map choice, Kamo was neutralizing the home-field advantage. Gojo could have chosen a map to exploit a perceived weakness—an oceanic abyss to dilute blood, or a sodden rainforest to hinder movement. But a strong warrior's confidence was his currency. He didn't believe the old limitations of Blood Manipulation even applied to the man before him anymore.
He chose a stage that promised aesthetic satisfaction. A worthy backdrop for a clash of titans.
"The map is set," Kamo announced. He'd prepared monitors inside the bunker for Geto, Shoko, and the girls—a front-row seat to the spectacle. "Let us begin."
The two sorcerers exited the reinforced base, the steel door sealing shut behind them with a definitive thud. They walked across the stark black sand, putting distance between them before turning to face one another.
On the monitors, the barren rock of Jishi Island began to warp. The air above it shimmered like a heat haze, then solidified. The jagged cliffs melted and reformed. A serene, snow-capped cone erupted from the valley, surrounded by lush foothills and a perfect mirrored lake. The iconic silhouette of Mount Fuji, pristine and majestic, now stood where desolation had been moments before.
Inside the barrier, the scent of pine and volcanic soil filled the air. A cool breeze whispered across the slopes.
Kamo Itsuki and Gojo Satoru stood on a ridge overlooking the fabricated landscape, the mountain's summit gleaming under a simulated sun.
The most anticipated duel in the jujutsu world was moments from ignition.
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