underwater, a surreal scene unfolds in icy deep waters as armored riders on polar bears move gracefully through the depths, the riders wear heavy, frosted copper diving suits with complex brass helmets and glowing blue visor lights, each rider holds a long, steam-powered harpoon-lance adorned with sub-aquatic lanterns that cast a bright, neon-blue glow in the freezing water, endless columns of bubbles rise around them, the polar bears, equipped with leather bridles and heavy brass shoulder guards, swim calmly, their thick fur swaying in the current, in the background, a silent procession of riders stretches into the dark, misty distance beneath a ceiling of faint ice shelves, the atmosphere combines arctic fantasy and retro-steampunk, capturing an otherworldly underwater empire.
