Design a vertically elongated, rectangular gothic artwork in a minimalist style, suitable for the back of a t-shirt. The design should feature Nyx, the goddess of the night, standing tall with her abstract, flowing cloak forming the majority of the vertical space. A large, stylized raven sits perched on her shoulder, its wings extending upward along the design. Above her head, a crescent moon is positioned at the top of the composition. The artwork should use bold, clean black lines on a white background, with minimal detailing to maintain a sleek and gothic atmosphere. Incorporate subtle elements of death and darkness, maintaining a mysterious and somber mood. The overall aesthetic should be simple yet striking, perfect for a modern gothic t-shirt design.