What they found behind the painting was a safe, locked with some sort of combination of numbers.
The student's frustration was palpable. "We don't know the combination," he groaned, kicking at the ornate rug that lay before the safe. "This is useless!"
William stepped forward, his curiosity piqued. "Let me take a look."
The safe, though ancient, appeared similar to those he had encountered in his own time. He examined the dial, the intricate carvings that adorned its surface, searching for any clue to its combination.
"I can find the combination for you," the demonic sword's voice whispered in his mind.
William, though growing accustomed to the sword's unexpected assistance, couldn't help but feel a surge of skepticism.
"Are you sure?" he asked mentally. "And how, exactly, do you propose to do that?"
"This safe requires more than just a numerical code," the sword explained. "It also requires the user to channel mana into each number as it's selected. I can sense the residual mana from previous activations, like a ghostly imprint on the dial."
"But that's impossible," William argued. "The last person to open this safe was probably centuries ago. The mana couldn't have lasted this long."
"Trust me, boy," the sword retorted, its tone confident. "I know what I'm doing."
William, despite his reservations, decided to trust the sword. He needed to get that safe open, and quickly. But unwrapping the demonic blade in front of the other students was out of the question. He needed a distraction.
"Let's split up and search for clues to the combination," he announced, his voice projecting an air of urgency. "Don't work in teams. Time is of the essence, considering the fight outside seems to have ended."
The students, their anxiety heightened by the silence from the battle, readily agreed. They scattered throughout the palace, their footsteps echoing in the vast hallways.
William lingered for a few minutes, pretending to search, before returning to the safe. He unwrapped the demonic sword, its obsidian blade gleaming in the dim light. He held it close to the dial, waiting for the sword to work its magic.
The demonic sword hummed with a faint energy, its obsidian blade pulsing with a dim light. After a tense silence, the sword's voice echoed in William's mind, the numbers resonating with an eerie clarity.
William carefully inputted the code, his fingers trembling slightly. With a satisfying click, the safe swung open, revealing its hidden treasures. Inside, nestled on a bed of velvet, lay two objects: a flute crafted from a dark, polished wood and a book bound in black leather, its cover embossed with a serpent devouring its own tail.
"This is strange..." William murmured, his brow furrowed. He recognized the symbol, the Ouroboros, from his past life, but its meaning in this world remained a mystery.
"I've never seen anything like it," the demonic sword admitted, its voice laced with curiosity. "And I've been in this world for a long time. That flute...it radiates a peculiar energy."
William reached for the book, his fingers tracing the serpent's scales. It refused to open, its pages sealed by an unknown magic. He turned his attention to the flute. As his fingers brushed against its smooth surface, a torrent of images flooded his mind.
The visions were vivid, immersive. William found himself transported to the elven city's vibrant past. He saw Snow Elves, their faces etched with joy and contentment, going about their daily lives. The city pulsed with light, its streets and buildings illuminated by a radiant blue orb suspended high above the lake, a magical substitute for the sun. Gardens flourished under its gentle glow, their exotic plants thriving in the artificial sunlight.
Then, a figure emerged from the crowd, an elf adorned in ornate robes, a flute clutched in their slender hands. As the elf raised the instrument to their lips, a haunting melody filled the air. The waters of the lake began to churn, rippling violently as if disturbed by an unseen force.
Suddenly, a colossal serpent erupted from the depths, its scales shimmering like polished obsidian. Its eyes, twin orbs of molten gold, were the size of houses, its gaze filled with an ancient, terrifying power. The creature's immense body, easily spanning a hundred and twenty meters, barely fit within the cavern, its tail thrashing wildly, sending tremors through the city.
The vision abruptly ended, leaving William gasping for breath, his heart pounding in his chest. He stared at the flute in his hand, its smooth surface now chilling to the touch. He had just witnessed a glimpse of the elves' power, a magic that could summon colossal creatures from the depths. Fear mingled with awe, a potent cocktail of emotions that left him trembling.
"What did you see?" the demonic sword pressed, its voice a low growl. "You reek of fear and awe. Something powerful touched your mind."
"You won't believe me," William said, his voice barely above a whisper. "I saw an elf playing this flute, and then...a gigantic serpent emerged from the lake. It was colossal, at least a hundred and twenty meters long."
"What?" the sword exclaimed, its tone incredulous. "If that's true, then it could be a mythical creature. Something beyond even my understanding."
William, still reeling from the vision, gathered the other students. He recounted what he had seen, the details vivid in his mind. The students, though initially skeptical, listened with growing apprehension.
"Are you thinking of using that flute?" Altair asked, his voice laced with worry. "We're trying to escape, not summon a monstrous serpent."
"We haven't found an exit yet," William argued, "and those attackers are still out there. The serpent didn't seem hostile towards the elf who played the flute. Perhaps it will help us."
"Assuming it doesn't attack humans," Altair countered. "Remember, the flute player was an elf, like everyone else in this city."
William hesitated, weighing the risks. Was it a good idea to use the flute, or was he doing something that would make things even worse for them?
William, his resolve hardening, made a decision. He would use the flute. He gathered the students, his voice unwavering despite the tremor of fear that ran through him.
"I'm going to summon the serpent," he announced, his gaze sweeping across their anxious faces. "But I need you all to remain inside the palace. I'll ensure it's safe before signaling you to come out."
"William, no!" Altair protested, his voice filled with concern. "That's too dangerous! We can find another way."
Other students echoed his sentiment, their voices a chorus of dissent. But William, his leadership instincts taking over, held his ground.
"I appreciate your concern," he said, his voice firm, "but this is our best chance. I won't risk all our lives by summoning it without precautions. Trust me."
He met their gazes, his determination unwavering. Reluctantly, they agreed. William, clutching the flute, stepped out of the palace and onto the shores of the lake. He closed his eyes, took a deep breath, and raised the instrument to his lips.
"Let's do this," he whispered, a hint of fear battling with the resolve in his voice.
The water around the island started to move, and William knew that was the sign the serpent was waking from its slumber.