Create a detailed and rich prompt for a digital painting of a mystical dragon perched on a cliff edge overlooking a misty valley. The dragon should be highly detailed, with iridescent scales shimmering in the sunlight and piercing eyes that look as if they can see into the soul. The scene should be set in the early morning light, with the sun just starting to peek over the distant mountains. The dragon should be rendered in a realistic style, with intricate textures and shading that brings the creature to life. The cliff edge should be rugged and steep, with a rocky outcropping that juts out into the valley below. The mist should be thick and ethereal, creating an otherworldly atmosphere that adds to the mystical feel of the piece. The dragon's wings should be outstretched, ready to take flight, and its claws should be digging into the rocky surface of the cliff. The dragon's environment should be surrounded by lush, vibrant trees, with hints of autumn colors starting to appear in the leaves. The overall mood of the piece should be one of magic and mystery, with the viewer feeling as if they are witnessing a rare and special moment in the life of the dragon. Use an aspect ratio of 2:1 to capture the sweeping landscape and the full majesty of the dragon.