The Prism Corps headquarters, a colossal marvel of neon and chrome, pierced the glittering skyline of Nova City. Its sleek, aerodynamic form stood resolute against the backdrop of floating arcologies, their windows ablaze with a thousand different hues. Light-speed shuttles zipped past, their contrails like fleeting streaks of paint across the canvas of the cosmos.Here, nestled amongst the neon-lit skyscrapers, the beating heart of the Prism Corps pulsed with unwavering purpose. Inside, a controlled hum of activity thrummed through the corridors. Denarians in their crimson uniforms meticulously prepped combat suits, calibrating energy signatures and ensuring every weapon system sang in perfect harmony.Astra Blaze, Prism Prime, her fiery red hair pulled back in a tight braid, strode purposefully through the command center. The holographic map of the galaxy shimmered before her, a tapestry of twinkling stars and swirling nebulae. Beside her, Cygnus Vortex, his ever-present smirk playing on his lips, tapped a holographic display, manipulating the gravitational field around a rogue asteroid."Just another manic Monday, eh Astra?" he drawled, his voice laced with amusement.Astra shot him a playful glare. "Always keeping us on our toes, Cygnus. But seriously, that asteroid's on a collision course with the Xantarian colony. Evacuations are underway, but Xanathar's forces might try to disrupt them."Suddenly, the holographic display flickered, distorting the image of the asteroid field. A high-pitched whine filled the air."Vega!" Astra barked, her voice sharp with urgency.Vega Specter materialized beside them, her spectral form shimmering faintly. "Incoming transmission, Prime. It's...Nebula."The image on the display solidified, revealing Nebula Vortex, her once vibrant eyes now cold and calculating. She stood amidst a legion of Xandrosian warriors, a cruel smile twisting her lips."Greetings, old friends," her voice echoed through the command center, laced with venom. "I see you're still clinging to your precious order. How quaint."Nebula gestured towards the Xandrosian warriors flanking her. "Consider this a token of Xanathar's appreciation. His offer stands - join him, and together we will reshape the galaxy."A collective growl rose from the assembled Denarians. Astra clenched her jaw, her fists sparking with solar energy. "Never, Nebula. You've betrayed everything we stand for."Nebula's smile widened. "Such a shame. Then prepare for war."The transmission flickered out, plunging the command center into an unsettling silence. Astra met Cygnus' gaze, a flicker of steely determination hardening in their eyes."Alright team," Astra boomed, her voice ringing with authority. "Looks like Xanathar's decided to play his hand. Centurions, prepare the battle cruisers. Denarians, mobilize for planetary defense. Millennians, evacuate the Xantarian civilians. We move out… now!"A wave of energy surged through the headquarters. Denarians scrambled to their stations, fingers flying across control panels. Millennians, clad in their silver uniforms, sprinted towards the hangar bays. The hum in the air intensified, morphing into a symphony of purpose as the Prism Corps geared up for battle. Nova City, once a beacon of peace, now braced for the onslaught of a dark tide.