A black dog with completely black eyes stands at a worn wooden back door, surrounded by an aura of mystique, its fur a deep, glossy black, with an air of intrigue, the door's old hardware and worn paintwork visible, as the dog's eyes seem to hold a deep, unblinking gaze, set against a subtle, gradient background that shifts from a deep blue to an inky black, evoking a sense of mystery and otherworldliness, with the dog's facial features, including its nose and mouth, subtly illuminated, as if by an unseen moonlight, and its overall demeanor conveying a sense of quiet, mystical power.