A dark hooded man standing in front of a full moon

Design a spine-tingling t-shirt featuring a mysterious and sinister creature lurking in the shadows. This creature could be a monstrous figure with elongated limbs, sharp claws, and glowing eyes. Add details like a tattered cloak or bloodstains to enhance the sense of danger. Incorporate elements like a moonlit cityscape or a foggy alleyway to create a chilling ambiance. Use a color palette of deep blues, ominous grays, and eerie greens to evoke a sense of darkness and fear.