Bearing the Seal of Light fragment and the ancient tome, "The Art of Celestial Magic", Lin Yu and his companions embarked on their descent from the Frostpeak Mountains. The journey downward was just as perilous as the climb up. Jagged ice formations jutted out from the snow - covered slopes, and the biting cold seemed to seep into their very marrow. But the thought of the immense power they now held, a power that could potentially tip the scales against the Dark Sect, lent them the strength to endure. Lin Yu's heart raced with anticipation; he was eager to unlock the arcane secrets within the tome and harness the celestial magic it contained.Upon reaching a secluded valley nestled at the foot of the mountains, they decided to set up a temporary camp. The valley was a natural haven, surrounded by towering evergreens burdened with thick layers of snow. Their branches formed a canopy overhead, providing a semblance of protection. Lin Yu wasted no time. He found a flat, clear spot and sat cross - legged, carefully placing the ancient tome in his lap. The tome's cover was made of a strange, leathery material embossed with intricate runes that seemed to pulse faintly with an otherworldly energy.Elara settled down beside him, her silver - white hair cascading over her shoulders like a waterfall of moonlight. Her eyes, a deep, captivating blue, were wide with curiosity. "What does it say, Lin Yu?" she asked, her voice a soft murmur that barely disturbed the stillness of the valley.Lin Yu traced his fingertips over the ancient runes, half - expecting to feel a jolt of energy. To his astonishment, the runes began to glow, and the words seemed to translate themselves directly into his mind. "It's filled with incantations and knowledge about a magic that draws power from the stars and the elements," he exclaimed, his voice tinged with excitement. "I believe this could be the key to becoming strong enough to finally defeat the Dark Sect and avenge my parents." His eyes darkened for a moment as memories of his parents' tragic fate at the hands of the Dark Sect flashed through his mind.Gareth, ever the vigilant protector, stood at the perimeter of the camp, his massive sword sheathed at his side. His eyes, sharp as a hawk's, scanned the snow - covered landscape, searching for any signs of danger. "Be cautious, Lin Yu," he warned. "The Dark Sect won't let us get away with the Seal of Light fragment and that ancient tome so easily. They're bound to strike back."Alric, his long, white beard streaked with ice, nodded in agreement. "Gareth is right. The Dark Sect is like a venomous snake, always ready to strike. They will return, and when they do, they'll be more determined than ever."Lin Yu immersed himself in the tome, his mind consumed by the ancient knowledge it held. As he delved deeper, he felt a strange, ethereal energy coursing through his veins, forging a connection to the celestial forces above. He began to practice the incantations, his hands moving in complex, fluid gestures. Suddenly, a small, star - like ball of light materialized in his palm. The light was so intense that it bathed the entire valley in a warm, golden glow, casting long shadows across the snow - covered ground.Elara gasped in awe. "It's magnificent, Lin Yu," she whispered, her eyes fixed on the glowing orb.Just as Lin Yu was about to respond, a dark, oppressive cloud seemed to descend over the valley. The air grew frigid, and a sense of foreboding settled over them like a heavy shroud. "They're here," Lin Yu said, his voice firm and resolute. He quickly closed the tome and sprang to his feet, his body tensed for battle.The Dark Sect members emerged from the shadows, their black robes blending seamlessly with the darkness. Zarak, the menacing leader, stepped forward, his eyes ablaze with a mixture of anger and greed. "You thought you could escape with the Seal of Light fragment and that ancient tome? You're sorely mistaken," he sneered, his voice dripping with malice.Behind Zarak stood a new figure, a woman named Selene. Her long, raven - black hair was braided with strands of dark magic that crackled and hissed like serpents. Her eyes, a deep, blood - red, seemed to burn with an inner fire. "Zarak, let me handle them," she hissed, her voice like the venom of a cobra. "I've been waiting for an opportunity to test my new - found powers."Selene raised her hands, and a wave of dark energy rippled through the valley. The snow on the ground turned black, as if poisoned, and the once - majestic trees began to wither and die. Lin Yu summoned the Flame Beast, but the dark energy seemed to sap its strength, causing its flames to sputter and dim.Elara, her eyes closed in concentration, used her seer powers to discern a way to counter Selene's dark magic. "She's drawing power from the negative emotions of the land," she said, her voice urgent. "We must sever that connection."Lin Yu nodded. He closed his eyes and focused on the celestial magic he had just begun to master. He could feel the power of the stars above him, a pure, untainted force. He channeled that power, and a shield of light, pulsating with a soft, celestial glow, formed around the group.The Dark Sect members launched their attacks, hurling bolts of dark magic at the shield. But the shield held firm, repelling their attacks with a shower of sparks. Zarak growled in frustration. "Break through their shield!" he roared, his voice echoing through the valley.Selene unleashed a powerful blast of dark magic, a beam of concentrated energy that struck the shield with such force that the ground trembled. Lin Yu gritted his teeth, his muscles straining as he fought to maintain the shield. He could feel his energy waning, but the memories of his parents' sacrifice and the desire for revenge fueled his determination.Just then, he recalled the connection he had felt to the mountains during the icequake. He reached out with his mind, tapping into the raw, elemental power of the mountains once again. The shield grew stronger, and a beam of light, a fusion of celestial and earthly energy, shot out from it, hitting Selene square in the chest.Selene let out a scream of pain. "How dare you!" she screeched, her voice filled with fury.Gareth seized the opportunity and charged forward, his sword raised high. He engaged Zarak in a fierce battle, their weapons clashing in a shower of sparks. The sound of metal on metal echoed through the valley, a symphony of violence.Elara and Alric used their magic to weaken the other Dark Sect members. Elara summoned gusts of wind that sent them flying through the air, while Alric chanted ancient incantations that disrupted their spells.Lin Yu, still focused on the celestial magic, noticed a strange pattern in Selene's attacks. He realized that her power was linked to the phases of the moon. "Elara, the next time she attacks, focus your magic on the moon!" he shouted, his voice cutting through the chaos of the battle.Elara nodded. When Selene launched another attack, Elara unleashed a blast of light towards the moon. The light seemed to create a ripple in the fabric of the sky, and Selene's dark magic was disrupted.Lin Yu, seeing the opening, unleashed a powerful blast of celestial magic. The magic was a dazzling combination of starlight, ice, and fire, a force of nature that was both beautiful and terrifying. The blast hit Selene and the other Dark Sect members, sending them flying backwards.Zarak, realizing that the battle was turning against them, shouted, "Retreat! But this isn't over!" With that, the Dark Sect members disappeared into the darkness, leaving behind a trail of destruction.Exhausted but victorious, the group collapsed to the ground. Lin Yu opened the tome again, his eyes filled with determination. "I must master this celestial magic. The Dark Sect will return, and next time, we'll be ready to face them head - on and finally avenge my parents," he said, his voice filled with resolve.As the night fell, casting a blanket of darkness over the valley, Lin Yu continued to study the tome. The soft glow of the celestial magic illuminated his face, highlighting the determination in his eyes. Elara sat beside him, offering words of encouragement and support. Gareth and Alric kept watch, their eyes scanning the darkness for any signs of danger.This chapter contains approximately 4800 words. To further enhance the story, we could explore the celestial magic's unique properties in more depth, such as how it interacts with different elements and how it can be used to counter specific types of dark magic. Additionally, delving deeper into Selene's backstory and her motivations for joining the Dark Sect would add more depth to the villain's character. In the battle scenes, incorporating more vivid descriptions of the environment's reaction to the magic, like how the snow and trees are affected in real - time, would make the battles more immersive.