A crimson flare erupted across the obsidian expanse of space, heralding the arrival of Xanathar Prime's flagship, the Shadow Reaver. Its jagged silhouette, bristling with pulsating dark matter cannons, loomed over Nova City, the radiant capital of the Prism Corps. Panic surged through the neon-lit streets as holographic alarms blared, projecting warnings of imminent invasion.Astra Blaze, Prism Prime and leader of the Corps, stood resolute atop the pinnacle of the Prism Corps headquarters. Her cerulean uniform shimmered with the power of the Solar Prism, a beacon of hope against the encroaching darkness. Beside her stood Cygnus Vortex, his brow furrowed in concentration as he manipulated the city's gravity to create an extra layer of defense. Vega Specter, her form a shimmering mirage thanks to the Spectrum Prism, materialized beside them, a grim expression etched on her face."They've come," Astra stated, her voice laced with steely resolve. "Centurions, defend the city! Denarians, form a perimeter around the Prism Core! Millenniums, evacuate civilians to designated shelters!"Her commands echoed through the city, met with a flurry of activity. Prism Corps members, clad in their polarized armor, streamed out of the headquarters, their boots thudding on the metallic walkways. Millenniums, their faces grim but determined, began ushering frightened civilians towards designated transport shuttles.A wave of dark energy surged from the Shadow Reaver, engulfing the city in an unnatural twilight. Buildings groaned under the strain as shadowy tendrils lashed out, seeking to tear them apart. From the depths of the Reaver, an armada of Xandrosian warships materialized, their crimson hulls casting ominous shadows."Vega," Astra bellowed, her voice cutting through the chaos, "Disrupt their communication channels! Cygnus, reinforce the city's energy grid!"Vega vanished in a flicker of prismatic light, reappearing amidst the Xandrosian fleet. With a surge of her power, she unleashed a torrent of electromagnetic energy, scrambling their communication systems and plunging their ships into momentary darkness. Cygnus, channeling the gravity of a nearby neutron star, bolstered the city's energy defenses, creating a shimmering barrier that deflected the initial volley of dark matter blasts.A thunderous roar echoed across the battlefield as Orion Shield and Aurora Flux rocketed out of the Prism Corps hangar. Orion, his celestial armor gleaming like a celestial shield, slammed into a Xandrosian warship, his fist connecting with its hull with enough force to crumple entire sections of metal. Aurora, her form shimmering with cosmic energy, manipulated the fabric of space itself, warping the trajectory of incoming missiles and sending them hurtling back towards the Xandrosian fleet.The battle raged across Nova City. Prism Corps Denarians, wielding their combined might, unleashed a torrent of energy blasts that ripped through the Xandrosian ranks. Millenniums, piloting sleek sky flyers, weaved through the battlefield, their photon blasters spitting emerald fire. But the Xandorians were relentless, their sheer numbers threatening to overwhelm the city's defenses.Suddenly, a tremor shook the city. From the heart of the Shadow Reaver, a colossal figure emerged, wreathed in dark energy. Xanathar Prime, his obsidian armor crackling with malevolent power, descended upon Nova City with a thunderous crash."Foolish Prism Corps," he boomed, his voice echoing with dark amusement. "You cannot hope to resist the might of Xandros!"Astra surged forward, the Solar Prism blazing with incandescent light. "We will never surrender, Xanathar! As long as the Prism Corps stands, peace will prevail!"Their battle commenced, a clash of light and darkness that shook the very foundations of Nova City. Astra, channeling the fury of a dying star, unleashed a torrent of solar energy that scorched the ground around Xanathar. The Xandrosian warlord countered with a wave of dark energy, extinguishing the flames and shrouding the area in an unnatural gloom.As the two titans clashed, the fate of Nova City, and perhaps the entire cosmos, hung in the balance. The remaining members of the Prism Corps fought with renewed vigor, their determination fueled by the knowledge that they were the last line of defense against the encroaching darkness.