The portal dissolves behind them, and Echo and Li Wei are immediately hit by a blast of frigid air. They stand on a vast glacier, its surface shimmering like a field of diamonds under a pale, silver sun. The "Glacier Concerto" dimension is a world of ice and melody—icicles hang from jagged cliffs, their lengths varying to create a natural xylophone that chimes with the wind; frozen lakes hum with deep, resonant tones as cracks spread through their surfaces; and snowflakes fall in patterns that form delicate harmonies. In the distance, a range of ice-capped mountains rises, their peaks piercing the sky, and from their depths comes a low, rumbling melody—the "Frost Finale," the natural symphony that keeps the dimension in balance.Nova's avatar flickers into view, her form glitching slightly as frost forms on her edges. "Remarkable," she says, her sensors working to analyze the environment. "The cold here is maintained by musical frequencies. The icicles vibrate to create treble notes, the frozen lakes resonate with bass tones, and the mountains themselves are like a giant pipe organ, their caves and crevices amplifying the Frost Finale. It's a delicate balance—too much warmth, and the ice melts; too much cold, and everything freezes solid."Chen Jiuzhang's hologram materializes beside her, his breath visible as a cloud of vapor. "But that balance is collapsing," he says, pointing to a section of the glacier where the ice has turned black and brittle. "The 'Frost Conductor' has arrived. It's a being of pure cold that's amplifying the Frost Finale into a 'Glacial Gavotte'—a melody that's freezing the dimension solid. The ice is spreading, the natural harmonies are being silenced, and if it continues, the entire dimension will become a frozen wasteland, its music trapped forever in ice."Echo pulls her coat tighter around her, her breath forming a small cloud. She taps her peace drum lightly, and the sound seems to hang in the air, making the nearby icicles chime in response. "How do we counter it?" she asks."By finding the 'Avalanche Anthem'," Chen says. "It's a melody stored in the 'Crystal Chasm'—a cave deep within the largest mountain. The chasm is lined with 'Sonic Ice'—a rare form of ice that can store and amplify musical energy. If we can release the Avalanche Anthem, it will melt the excess ice and restore the Frost Finale to its natural rhythm."Li Wei's charge pulses with a purple glow, and he rubs his hands together to warm them. "Then let's find this chasm," he says. "Before we turn into ice sculptures."They set off across the glacier, their boots crunching on the snow. The further they go, the more signs of the Frost Conductor they see: ice that has spread over areas that should be free of it, covering frozen lakes and climbing up the sides of mountains; icicles that have grown too long, their chimes turning into harsh, discordant clangs; and a thick, freezing fog that rolls across the landscape, muffling the sound of the Frost Finale.As they walk, they hear a low, droning melody—a fragment of the Glacial Gavotte. It's a slow, icy tune that makes Echo's fingers numb, and she can see the snow around them hardening into solid ice as the sound passes."This is the opposite of the Lava Symphony dimension," Li Wei says, his voice tight as he shivers. "There, we were worried about melting. Here, we're worried about freezing solid."Echo nods, raising her peace drum. She starts to play a lively, upbeat rhythm, and the ice around them softens slightly, the fog lifting in a small circle around them. "Music can warm things up, too," she says.They continue across the glacier, Echo playing her drum to keep the Glacial Gavotte at bay, Li Wei scanning the area for any sign of the Crystal Chasm. Along the way, they encounter a group of snow sprites—small, humanoid creatures made of snow with eyes like ice chips. Their forms are shrinking, their edges turning hard and crystalline, and they look frightened."The Frost Conductor is in the heart of the largest mountain," one of the sprites says, its voice a faint, icy whisper. "It's been there for days, conducting the Glacial Gavotte with a 'Freeze Fugue' that's making everything colder, harder. The ice is spreading, the Frost Finale is being silenced, and soon, the entire dimension will be frozen. We can't stop it—our cold is no match for its power."Echo nods, her drum still playing. "We'll stop it," she says. "We just need to find the Avalanche Anthem."The sprite points to a narrow valley between two mountains. "It's through there, in the Crystal Chasm. But be careful—the Conductor has summoned ice elementals to guard the way. They're made of the same stuff as the glaciers, and they'll attack anything that tries to pass."Echo and Li Wei thank the sprites, then make their way to the valley. The valley is dark and narrow, its walls lined with ice that glows with a soft, blue light. The sound of the Frost Finale is louder here, but it's distorted, with slow, dragging notes that make the air feel heavier.As they enter the valley, they're immediately set upon by ice elementals—tall, humanoid creatures with bodies made of solid ice, their eyes glowing with an intense, blue light. They move with surprising speed, swinging their arms to send shards of ice toward Echo and Li Wei.Echo plays a fast, rhythmic beat on her drum, creating sound waves that shatter the ice shards. Li Wei fires blasts of energy from his charge, which warm the elementals' bodies slightly, making them slower and less rigid.They fight their way through the valley, the cold becoming almost unbearable. The deeper they go, the more intense the Glacial Gavotte becomes, and the more powerful the ice elementals are. But they press on, Echo's drumbeat never faltering, Li Wei's energy blasts never ceasing.Finally, they reach the Crystal Chasm—a large, cavernous space at the heart of the mountain. The walls are lined with Sonic Ice, which shimmers with a rainbow of colors as it reflects the light from Li Wei's charge. In the center of the chasm, a massive ice sculpture rises from the ground—the "Frost Forte," a natural instrument that's the source of the Frost Finale. It's a beautiful, intricate structure, its surface covered with delicate carvings that vibrate with the dimension's natural melody.Standing beside the Frost Forte is the Frost Conductor. It's a towering figure, its body a mass of swirling snow and ice, its face a mask of frozen water that glows with an intense, blue light. In its hand, it holds a baton made of solid ice, and it's conducting with slow, deliberate motions that make the Frost Forte glow brighter, its melody becoming colder and more intense."You're too late," the Frost Conductor says, its voice a harsh, freezing wind. "The Glacial Gavotte is nearly complete. The entire dimension will freeze, and the Frost Finale will spread across the multiverse, covering everything in ice, silencing all music. Cold will reign supreme, and harmony will be nothing but a memory."Echo shakes her head, her drum still playing a steady beat. "That's not harmony," she says. "That's just stagnation. And we're here to melt it away."She starts to play a new melody, one that weaves together the natural rhythm of the Frost Finale with the warm, lively tones of the dimensions they've saved. The Frost Forte responds, its glow softening, its melody becoming more fluid. The ice elementals hesitate, their forms melting slightly as the music washes over them.Li Wei takes advantage of the moment, firing blasts of energy at the elementals, warming them up until they melt into pools of water. The Frost Conductor roars, swinging its baton to send a wave of ice toward Echo. Li Wei steps in front of her, using his charge to create a shield of warm energy that melts the ice."Go!" he shouts. "Release the Avalanche Anthem!"Echo sprints toward the Frost Forte, her drum still playing. She reaches the ice sculpture and places her hands on it, feeling its cold surface and its rhythmic vibrations. She closes her eyes, focusing on the Avalanche Anthem—a melody that balances cold with warmth, stillness with movement.As she plays, the Frost Forte glows with a soft, golden light that spreads through the chasm. The Frost Finale returns to its natural rhythm, the harsh, discordant notes fading away. The ice elementals melt completely, the ground stops freezing, and the sound of the glacier's natural melody fills the air—a beautiful, flowing symphony of ice and wind.The Frost Conductor shrieks, its body shrinking as the golden light washes over it. "No!" it roars. "Cold can't be defeated! It must freeze everything!" It swings its baton one last time, sending a final wave of ice toward Echo, but it's weak, and it melts before it reaches her.The Frost Conductor lets out a final, angry howl, then dissolves into a cloud of snow, which is quickly blown away by a warm breeze.Echo and Li Wei collapse onto the ground, exhausted but relieved. The Frost Forte glows brightly, its golden light spreading through the mountain, stabilizing the Frost Finale. The sound of the icicles chiming, the frozen lakes humming, and the mountains rumbling is now a harmonious melody, a beautiful concerto of ice and wind.They make their way back through the valley and out onto the glacier, where the snow sprites are waiting. Their forms are restored, their bodies soft and white, their eyes shining with gratitude."Thank you," the sprite leader says, its voice a warm, gentle whisper. "You've saved our home, our music, our very existence. The Frost Finale is back to normal, and the glacier is stable."Echo and Li Wei smile, but their attention is drawn to the sky, where a faint, rainbow glow has appeared—a sign that another dimension is in trouble.Li Wei stands, his charge in hand, and brushes snow off his clothes. "Shall we?" he asks.Echo nods, slinging her peace drum over her shoulder. "Always," she says. "The multiverse's melody is counting on us, and we'll keep playing as long as it needs us."They step through the portal Nova opens, leaving the Glacier Concerto dimension behind. The next adventure is calling, and they're ready to answer, their instruments and spirits as strong as ever.