mythical crystalline polar bear, body made of iridescent crystals, translucent facets refracting aurora borealis hues, bioluminescent glow, ethereal dreamscape, cosmic energy, tail shimmering northern lights, glowing shard trail, detailed fur-like crystalline texture, icy tundra setting, atmospheric mist, volumetric lighting, ultra-detailed, cinematic fantasy, majestic, ethereal luminescence, high dynamic range, intricate reflections, fantasy realism