Expand the city by filling the surrounding image with several identical elfic buildings and lots of structures with identical architectural style revealing a massive elfish fantastic metropoli with a huge extention with sevral strongholds and towers, mighty domes and palaces and some bridges across tall buildings, realistic style with sharp details and vibrant colors, and ensure the animation is smooth and detailed, with a 4K resolution, ensure to add identical elfic elements to all buildings to keep the harmony of the picture