A digital illustration shoot from the side about a fantasy scene featuring a dragon and a knight in a lush green landscape with a castle in the background. the scene is set in a mountainous area with lush greenery and a bright blue sky with fluffy white clouds. on the left side of the image, a dragon with green scales and a long, slender body is in mid-air, with its wings spread wide, as if it's about to take flight. the dragon appears to be roaring, its mouth open in a fierce expression, and its scales glistening in the sunlight. the knight, wearing a green helmet and full armor, is standing in front of the dragon, holding a shield and sword, facing away from the dragon. in the foreground, the dragon is positioned in a defensive stance, with the knight's back to the viewer, adding to the sense of dominance and power. the castle ruins can be seen in the distance, with crumbling stone walls and ivy-covered roofs, and the dragon's wings are spread wide as it soars through the air. the overall scene is vibrant and detailed, with a sense of fantasy and adventure.