The buried airport's corridors echoed with the sound of collapsing steel and distant cries. Civilians had been guided to safety, but the Prime 10 Devil loomed ahead, massive and grotesque, its crimson eyes fixed on the four heroes. Dust swirled around its jagged form, shadows twisting unnaturally over its body.
Yuto stepped forward, katana in hand, golden light beginning to glow along its edge. "We stop it here!" he shouted. His first strike would test both his strength and precision. He activated Sun Power: Radiant Burst, slashing his katana through debris and launching a wave of blinding sunlight toward the Devil. The flash illuminated the ruined airport, revealing every jagged shadow the creature tried to hide within.
Sousuke's eyes crackled as electricity surged along his Thunder Bolt weapon. He gripped it tightly and called out, "You'll feel the full force! Thunder Power: Divine Storm Vortex!"
He slammed the Thunder Bolt into the cracked floor. Immediately, a massive spiraling storm of lightning erupted around the Devil, arcs of electricity dancing unpredictably. The vortex pulled the Devil toward its center while bolts lashed its shadowed body, searing its corrupted flesh. Sparks flew in every direction, making the floor tremble. Sousuke's grip strengthened as he guided the storm, controlling its pull like a master conductor.
Tatsusuke advanced with his dual-sided katanas spinning. He activated Wind Power: Razor Gale, slicing at debris and the Devil's shadow tendrils with gusts of cutting wind. His second hand held Fog Power: Phantom Veil, which spread around him like a thick mist, obscuring their positions and confusing the Devil's senses. The Devil struck blindly into Tatsusuke's fog, hitting only air as he struck again with wind-bladed precision.
Akari stepped forward, spear raised, Water Power: Ocean's Requiem coiling around her weapon. With a thrust, torrents of water sliced through shadow tendrils, lifting debris and deflecting attacks aimed at fleeing civilians. "Stay behind me if you need protection!" she called, spinning her spear in a defensive circle that shined like silver-blue light in the chaos.
The Devil roared, shadow energy pulsating violently. It unleashed Shadow Pillars, massive spires of dark energy that erupted from the floor, aiming to crush the heroes.
Sousuke's Thunder Bolt weapon struck the floor again, activating Thunder Power: Lightning Cage, forming arcs of electricity that redirected the pillars harmlessly away. Tatsusuke's Fog Power: Phantom Veil obscured their movements, making it difficult for the Devil to land a hit, while Wind Power: Razor Gale shredded the tips of the spires before they reached them.
Yuto leapt into the air, Sun Power: Dawn's Edge igniting along his katana. With a downward slash, he released a concentrated beam of sunlight that burned away the shadows clinging to the Devil's body. Sparks and black energy scattered, leaving the creature staggered but far from defeated.
Sousuke spun the Thunder Bolt weapon in both hands, guiding the Divine Storm Vortex to widen and pull the Devil's massive frame toward the center again. Arcs of electricity danced across the floor, tearing through any remaining debris and making the ground hum with power.
Tatsusuke dashed forward, dual katanas flashing. Using Wind Power: Razor Gale, he cut through additional shadow tendrils while simultaneously letting Fog Power: Phantom Veil cloak his movements, making him appear in multiple places at once. The Devil swiped blindly, striking only mist.
Akari thrust her spear forward, water coiling along its length. Water Power: Tidal Barrage released, hurling a torrent of pressurized water to slice at the Devil's legs, forcing it to stagger backward. Every spin of her spear seemed to twist the water into deadly whips, precise enough to target weak points revealed by Yuto and Sousuke's attacks.
Yuto gritted his teeth, switching techniques mid-air. "Solar Flare Strike!" His katana blazed with concentrated sunlight, cutting through debris and striking at the Devil's chest. The creature howled in rage, shaking violently as its shadow tendrils thrashed wildly.
Sousuke adjusted the Divine Storm Vortex, the thunderstorm now expanding, arcs of electricity smashing into the Devil's limbs. The magnetic pull made it impossible for the creature to escape, and Sousuke grinned. "You're trapped!"
Tatsusuke rushed in, using Wind Power: Razor Gale for precision strikes, slicing tendrils that tried to lash the heroes. Then, switching to Fog Power: Phantom Veil, he disappeared within the mist, reappearing behind the Devil for a surprise strike.
Akari followed closely, spinning her spear with Water Power: Ocean's Requiem, sweeping away smaller debris while guiding fleeing civilians to a safer area. Her water currents combined with Yuto's sunlight, making the shadows melt into mist and light.
The Devil tried to retaliate, unleashing Shadow Surge, dark energy spikes targeting all four heroes. Yuto leapt forward, katana glowing with Sun Power: Radiant Burst, cutting through spikes mid-air. Sousuke directed the Divine Storm Vortex, arcs of lightning intercepting the rest. Tatsusuke's Fog Power and Wind Power combined defensive and offensive maneuvers to dodge and counter. Akari's spear twisted water currents to shield civilians while striking at the Devil.
Finally, the creature roared, staggering from the combined onslaught. Sousuke's Divine Storm Vortex crackled violently, Tatsusuke slashed tendrils with wind, Yuto's sunlight seared its chest, and Akari's water currents twisted like whips, restraining it momentarily.
Yuto landed gracefully, katana glowing gold. "We've got it cornered! Keep pressing!"
Sousuke spun the Thunder Bolt weapon once more, unleashing the final surge of Divine Storm Vortex, arcs of lightning chaining across the Devil. Tatsusuke slashed repeatedly with Wind Power: Razor Gale, while Fog Power: Phantom Veil obscured their positions, making counterattacks nearly impossible. Akari's Water Power: Tidal Barrage sliced the Devil's remaining shadow tendrils.
The Prime 10 Devil bellowed in fury, staggering in the ruined airport as the four heroes pressed their advantage. Every weapon, every power, and every technique had been unleashed in a coordinated assault.
Finally, after one last coordinated strike — Yuto's Solar Flare Strike, Sousuke's Divine Storm Vortex, Tatsusuke's Wind Power: Razor Gale, and Akari's Ocean's Requiem — the Devil collapsed, momentarily defeated but still alive, its crimson eyes burning with hatred.
The heroes paused, breathing heavily, surveying the destruction. Civilians were safe, scattered across cleared corridors. The Prime 10 Devil had been restrained but not yet destroyed. Akuma Ikari's shadow still lingered over them; the battle had only just begun.
Yuto sheathed his katana, golden light dimming. "We've saved the innocents… but this isn't over. Get ready."
Sousuke's Thunder Bolt weapon hummed faintly, still charged with residual energy. "Next time, we end it. No mistakes."
Tatsusuke adjusted his dual katanas, fog dissipating and wind calming. "We've learned its strength. Next strike will be sharper."
Akari's spear glinted, water swirling gently. "We fight together. Always together."
The four heroes advanced deeper into the buried airport, ready for the next clash. The Prime 10 Devil still lurked, and Akuma Ikari's schemes were far from complete.
The war for the airport—and the lives within—was only beginning.