Nova City, a dazzling metropolis nestled amidst neon-lit skyscrapers that scraped the sky, pulsed with the hum of a thousand activities. High above, the floating cities of the Luminarians, shimmering like ethereal bubbles, cast an otherworldly glow upon the cityscape. But within the imposing obsidian monolith that served as the Prism Corps HQ, a different kind of tension crackled in the air.Astra Blaze, Prism Prime and wielder of the Solar Prism, paced the expansive office, her fiery mane a stark contrast to the cool, metallic walls. Below, Nova City twinkled like a scattered diamond necklace, a stark reminder of the peace the Prism Corps protected. Yet, a disquieting message from a deep-space outpost hung heavy in the air."Anything from Cygnus?" Astra asked, her voice sharp with concern. Cygnus Vortex, the stoic Centurion with the Gravity Prism, was leading a recon mission near a rumored Xandrosian stronghold."Just static, Prime," Vega Specter, the ever-enigmatic wielder of the Spectrum Prism, materialized beside Astra. Her form shimmered slightly, a constant reminder of her ability to bend light. "The outpost lost contact hours ago."A knot of worry tightened in Astra's stomach. Xanathar Prime, the Xandrosian warlord and their greatest nemesis, wouldn't make a move without reason. His thirst for power was as insatiable as a black hole.Just then, the holographic display embedded in the desk flickered to life. A weary-looking Denarian officer, her uniform singed and bearing the telltale scorch marks of plasma fire, saluted shakily."Reporting from Forward Outpost Zeta, Prime," she rasped. "We were…overwhelmed by a Xandrosian force led by…Nebula Vortex."Astra's blood ran cold. Nebula, a former Prism Centurion who had succumbed to the allure of the Quantum Prism's reality-warping power, was a formidable opponent. Her unpredictable nature made her even more dangerous."Casualties?" Astra demanded, her voice a steely whisper."Heavy, Prime. We managed to send a distress beacon before…they…" The officer trailed off, her face etched with grief.Astra slammed her fist on the desk, the impact resonating through the office. "We need a plan. Now."Vega stepped forward, her form solidifying. "We need intel. If Nebula's involved, there's a good chance their target is a Prism Stone."A flicker of hope ignited in Astra's eyes. "Then we find it first. We can't let them get their hands on another source of Prism Force."Turning to another holographic display, Astra addressed the assembled Centurions, their faces grim but resolute. "Centurions, prepare for immediate deployment. We're heading to Xandar."As the holographic figures saluted, a low rumble echoed through the office. It was a sound Astra knew all too well – the unmistakable thrum of a battle ship powering up. The Prism Prime's flagship, the resolute Solaris, was poised for action.Today, the Prism Corps would face a two-pronged attack. But Astra, fueled by the unyielding light of the Solar Prism, wouldn't back down. The fate of the universe hinged on this mission, and she, along with her fellow Prism Corps members, would stand as the unwavering guardians against the encroaching darkness.