The moon hung low over Fuyuki City, casting long shadows that seemed to dance with an eerie life of their own. The night was still and silent, as if the world held its breath in anticipation of the final clash. In the heart of the city, where concrete met nature in a twisted embrace, two figures stood facing each other in a deserted square. The air seemed to hum with tension, the promise of magic and might about to be unleashed. Galewind Blight, the PlagueLord, towered like a dark omen. His presence was oppressive, a harbinger of decay and disease, yet ironically, he bore himself with an aura of invulnerability. His expression was enigmatic, eyes glinting with a mixture of malice and determination. The city around him seemed to wilt, the very life force ebbing away in a five-mile radius as his DecaySilence took hold. Across from him stood the Grand Master, his demeanor a stark contrast. Calm, cunning, and calculated, he gazed at Galewind with eyes that burned with purpose. Clad in a cloak that whispered secrets of the past and future, he was the puppet master of a formidable roster of mythical heroes and legends — his Servants. The stage was set for the ultimate confrontation; the prize was the Holy Grail, a relic capable of granting any wish the victor desired. Each fighter harbored dreams and desires deeply personal, yet only one would emerge triumphant. Galewind's voice was as cold as the night itself, an embodiment of the decay he wielded. "Grand Master, you stand before me with your illustrious entourage, but do you truly understand the plague you face?" The Grand Master chuckled, a knowing gleam in his eyes. "A folly, perhaps, for anyone else. But I harbor no illusions, Galewind Blight. You may try to infect the world with your presence, yet I have in my command legends that defied the very fabric of time and space." Galewind smirked, raising his hand as a dark sword materialized — PlagueBlade, born of suffering and torment. "Your legends might defy men, but can they withstand the unrelenting grasp of disease? Can they contend with the very essence of mortality itself?" The Grand Master remained unfazed. "That is precisely why they are legends." With that, he raised his arm, and a shimmer of light surrounded him as the heroic figures began to materialize around him. "Saber," the Grand Master commanded. The regal figure of Artoria shot forth, Excalibur gleaming with righteous fury as it cut through the night. A beam of focused light surged toward Galewind, a symbol of hope and destruction intertwined. "GaleSoul," Galewind whispered, a translucent aura enveloping him. The beam struck, but its deadly brilliance was nullified, unable to penetrate the invulnerable shield. "Saber's glory won't pierce my soul this night," Galewind taunted. "But let's test your mettle further. Pick your poison." With a wave of his hand, a cloud of malevolent energy swirled around him, converging towards the Grand Master. This was his power, to select any disease and direct its wrath against his opponent. Yet, the Grand Master's cunning shone through. "Caster, to me." Medea, the witch of betrayal, stepped forward, her violet eyes aglow with arcane knowledge. With Rule Breaker in hand, she dispelled the malady sent her master’s way, the curse dissolving into the air like mist under morning sun. Galewind's eyes narrowed. "Indeed, a very clever move, but clever won't secure you the Grail. Let’s escalate this." He focused, activating his PlagueGod, intending to bypass even the defenses of these eminent heroes with a lingering plague. It was a tactical play, a game changer designed to gnaw at their strength cumulatively. But Grand Master had anticipated this too. "Berserker, attack!" Hercules roared forward, his massive frame crashing into Galewind's defensive barrier, each strike a seismic event. Even if covered by GaleSoul, the sheer force of the legendary demigod tested the boundaries of invulnerability. "It matters not how many lives your berserker bears, each will fall into the maw of my Gambit," Galewind retorted staggeringly, casting GaleGambit. The nocturnal air shimmered ominously, Hercules' towering form and his vitality condensed down in an instant, mirroring Galewind’s artificially lowered visage. Yet, Grand Master’s resolve never wavered. "Even diminished, they stand. Archer, Lancer — execute!" Gilgamesh, the golden king, loosed Ea's destructive beam, igniting night into day, fracturing the space-time continuum around Galewind. In tandem, Lancer deftly hurled Gae Bolg, a destined spear for the heart, ensuring that fate was on his side. Galewind’s evasive maneuvers were artful, a dance of shadows that allowed him to sidestep annihilation momentarily, yet each attack left an ethereal mark. The cracks in GaleSoul widened, the ironclad shroud of invincibility inching toward its limit. The Grand Master called out, his fatal approach staving off exhaustion, "Assassin, strike!" Silent as death itself, Hassan materialized beside Galewind, his Cursed Arm aiming precisely for the heart, a decisive coup de grâce. In a blur, Galewind's own hand caught Assassin's wrist before it could deliver its lethal promise. Eyes meeting the Grand Master's across the battlefield, Galewind snarled, "Your cunning ends here!" Summoning every ounce of his burgeoning turmoil, he shattered Cursed Arm's hold and retaliated with a swath of decay — his blade slicing the night asunder. In the ensuing chaos, Rider charged across the heavens, delivering a conclusive blow upon the distracted PlagueLord. Medusa’s Pegasus trounced with ethereal grace, transforming fury into awe-inspired destiny. Crashing against an eternal sprawl of a cosmos sky, Galewind staggered, panting as his mirrored exhaustion echoed on the stout heart of night. His vision subsiding, he glimpsed the silhouette of victory moving away, a resolute Grand Master pulling his strings one final time. The Grand Master stepped forward, commanding authority etched in his every movement. "My wish, Grail," he commanded, his voice resonating through the honeyed haze of dawn, "is veracity and strength, a world born anew." As the last ember of life waned in Galewind's being, the Grail materialized — an ethereal light rising to honor the victor, ensuring his heart's desire would flourish with unrivaled promise.