A crystalline frost-fern stag with antlers formed from delicate ice crystals and frosted silver branches, translucent body showing internal bioluminescent vein networks pulsing with pale blue light, emerging from a frozen boreal twilight marsh where mist rises from thermal vents, surrounded by hoarfrost-covered pine silhouettes and aurora borealis streaks, scientific field notes cross-section mapping heat conservation organs and anti-freeze cellular structures, palette of glacial ice blue, phosphorescent cyan, deep evergreen shadows, and pale aurora green, Victorian natural history arctic expedition illustration aesthetic