ArsMJStyle, DnDBWIllustration, black and white image, monochrome, Create an illustration of a cartoonish humanoid mouse, dressed in clothing, holding an enormous key, the same height as the mouse. Behind the mouse, there is an open door. Key elements to focus on are the mouse holding the enormous key; both the mouse and the key should be clearly visible. The illustration should be in a magical, fairy tale style, inspired by the painting style of Russian artists.