The air was thick with mystery as the knight stepped through the pristine white door. In front of him lay an endless void, punctuated only by the stark contrast of the small white platform where Gaster stood, an eerie figure draped in shadows. The knight felt an unnatural chill, an anxiety that didn’t stem from fear but rather from the sheer peculiarity of the situation. Gaster’s gaze was unsettling; it felt as if he was looking not just at the knight, but directly through to the deeper void of reality. "Who dares disturb this realm?" the knight thought, muscles tensing as he gripped his nail-sword tightly. Yet Gaster remained silent, his enigmatic presence radiating an unsettling power. There was an ambient static, a sound that turned the knight's thoughts into sensory overload. You shudder passed through him as the knight silently vowed to confront this being and unlock the truths hidden within his silence. With a swift movement, the knight leapt into action, unleashing a flurry of void-infused attacks. Nails of dark energy shot forth like projectiles, aimed directly at Gaster. It was an assault fueled by the very fabric of his being, the Void's rage and perseverance. However, Gaster simply stood there, unflinching. Each attack collided with an unseen barrier, reverberating through the void like a glitch in a matrix. The strikes seemed to dissipate into static noise, as if even the fundamentals of battle had no bearing on this existence. "What is happening?" the knight pondered, his resolve momentarily shaken. Gaster's response came not through words but through a cacophony of Wingdings that floated in the air: a language beyond the comprehension of time and space. The symbols danced before the knight, twisting and contorting, but to the knight, they felt almost mocking. There was no reciprocation; instead, Gaster embodied the ultimate paradox: an opponent who would not even lift a finger in response. Driven by determination, the knight attempted a new strategy. Climbing walls with supernatural speed and agility, he aimed to surprise Gaster from above. With a calculated thrust of his nail, the knight descended, unleashing a powerful slashing arc. Once more, Gaster remained eerily calm; the attack fizzled into static, as if reality itself was denying its occurrence. “Is this all you can do?” the knight thought fiercely, his mind racing as he realized he was fighting not just a being but against the very concept of existence itself. The knight felt the welling void around him respond to his frustration, dark tendrils swirling in anticipation. He called forth his army of Hollow Nest, phantoms emerging from the darkness, drawn to the chaotic energy of their master’s plight. Even as the army charged, Gaster remained resolute, a relentless observer rather than an active participant. Waves of attacks crashed against his form, yet the void seemed to blink them out of existence as soon as they connected. Each confrontation dulled the knight's senses, the realization that he was tangling with an entity that transcended the boundaries of battle making the air heavy with despair. “Why do you linger?” the knight seethed, wielding the deepest void magic within him. He summoned acid pools around Gaster, a strategy rooted in the belief that even an aberration like Gaster could be rendered immobile. The space crackled with tension—but the void only manifested static noise in response, as if Gaster existed on a plane where time and consequence held no meaning. With exhaustion settling in every muscle, the knight found himself on the edge of surrender. Gaster did not fight back, did not draw upon any form of attack, yet it felt as if he was winning by mere existence alone. The knight gazed upon Gaster, the unyielding force of nature, and with a last shuddering breath, recognized the futility of his attempts. In this realm, the knight learned a profound truth—a battle without reciprocation became an unending loop of motion, where victory was forever out of reach, static resonating as the true conqueror of their encounter.