Act as a seasoned concept artist specializing in fantastical pirate-themed creations. Design a visually stunning pirate cannon that fires enchanted cannonballs. The cannon should have intricate carvings of [mythical sea creatures], with glowing runes etched along its barrel for a magical effect. The enchanted cannonballs should appear as [elemental orbs] — e.g., fire, ice, or lightning — trailing mystical energy as they launch. Place the cannon on the deck of a gritty pirate ship, surrounded by [treasure chests, torn sails, and a stormy ocean backdrop]. Ensure the scene captures the essence of adventure and magic, with dramatic lighting and a sense of motion. Use vibrant colors and fine details to emphasize the enchantment and pirate aesthetic.