Design a gothic artwork with a slightly elongated rectangular shape for the back of a t-shirt. The design features Nyx, the goddess of the night, a raven, and a crescent moon, with freedom in their arrangement. Nyx is depicted with detailed flowing robes and an ethereal, dark presence. The raven is rendered with intricate feathers, exuding menace and mystery. A crescent moon shines faintly in the composition. The entire artwork is framed by an ornate gothic border, inspired by cathedral windows, with sharp edges and detailed patterns. The design is in black and white, with heavy shadows and rich detailing, evoking a dark, gothic atmosphere perfect for a t-shirt.