A crimson sun dipped below the neon-lit skyline of Nova City, casting long shadows across the Prism Corps headquarters. Inside the polished command center, Astra Blaze, Prism Prime, paced restlessly before a holographic map of the galaxy. Her brow furrowed beneath her helmet as she reviewed the latest intel."Void Reaver activity has increased near the Xandros system," reported Vega Specter, her voice tinged with concern. "Cygnus, are you sure your sensors haven't picked up anything unusual?"Cygnus Vortex, ever the stoic, shook his head. "Negative, Vega. But Void Reaver operates in the Null Dimension, beyond the reach of most scanners. Its presence wouldn't be readily apparent.""This feels like a trap," Astra muttered, her hand clenching around the hilt of her energy sword. "Xanathar wouldn't be this brazen after his last defeat. There has to be more to it."Suddenly, an alarm blared, red lights flashing across the command center. A holographic image flickered to life, revealing a cloaked figure standing amidst the ruins of a Vorlaxian research facility."Greetings, Prism Corps," a distorted voice echoed through the chamber. "It appears you've stumbled upon a little project of mine."The figure unveiled a pulsating device, crackling with dark energy. It resembled a crude Prism Stone, twisted and corrupted."This," the voice continued, a hint of glee in its tone, "is the Null Prism. A conduit to the very dimension your nemesis calls home."A gasp escaped Vega. "Phantom Mirage!"The figure chuckled. "Indeed. And soon, the Null Dimension will spill forth, consuming everything in its path. But fear not, Astra Blaze, for there's still time to join the winning side."The image flickered and died, leaving the heroes in stunned silence."A new threat?" Cygnus rumbled. "And working with Xanathar's forces?"Astra slammed her fist on the holographic map. "This changes everything. We need to act fast. Cygnus, you and Vega investigate the Null Prism. Find a way to disable it. I'll gather the Denarians and prepare for a potential Xandros invasion.""What about Rift Walker?" Vega asked, worry lacing her voice. "We haven't heard from him in weeks."A grim silence descended upon the command center. Rift Walker, their resident time traveler, had been dispatched on a solo mission to prevent a temporal anomaly caused by Xanathar. Now, with the villain seemingly back in action, his absence was a worrying sign.Astra squared her shoulders, determination hardening her gaze. "We'll find him, Vega. But for now, we have a universe to save. Prism Corps, deploy!"Across the vast expanse of space, the Prism Corps mobilized. Denarians, clad in their sleek combat suits, swarmed onto battleships. Millennians manned communication stations, their enhanced strength a boon in times of crisis. Neon lights pulsed on the Prism Gliders as elite Syfon Warriors prepared for a potential confrontation with Xanathar's forces.Meanwhile, deep within the swirling vortex of the Null Dimension, a shadowy figure stirred. An entity of pure darkness, the Void Reaver sensed an opportunity. With the Prism Corps distracted, the time to consume reality had finally arrived.The stage was set for a cosmic clash. The fate of the universe hung in the balance as the Prism Corps faced a triumvirate of villainy unlike any they had encountered before.