"Imagine a circular design for a t-shirt featuring a 2D illustration of an ogre. The illustration should be gritty and ominous, with harsh lighting that casts deep shadows. The background should be pitch black, emphasizing the menacing presence of the ogre. Use a monochromatic palette with dark shades to create a foreboding atmosphere. Ensure the output is compatible with Cartoon--v 5.1, stylized to 500, and in an aspect ratio of 3:4.