Imagine a Viking fleet navigating through a snowy, enchanted ocean under a sky filled with shimmering auroras. The longships, adorned with glowing runes and dragon figureheads, cut through icy, sparkling waters as snowflakes fall gently around them. Sea serpents and mythical creatures swim alongside, their forms visible just beneath the surface. Describe this fantastical seascape, the powerful ships, and the resilient Vikings as they brave the snowy, magical waters on their quest for adventure and glory.