8K image depicting a Viking warrior leaping off a longship into the midst of a tumultuous sea. The warrior should be depicted mid-air, with a fierce and determined expression on their face, brandishing a gleaming sword in one hand and a shield emblazoned with intricate Norse symbols in the other. The warrior's attire should reflect authentic Viking garb, with fur-lined armor, a horned helmet adorned with intricate carvings, and weather-beaten leather boots.