Design a minimalist, fear-inspiring gothic artwork for the back of a t-shirt, in a slightly elongated rectangular shape. Use thick, bold black and white lines throughout. Feature Nyx, the goddess of the night, as a simple human figure with flowing robes, depicted with very thick lines. Nyx should not be a skeleton. Include minimalistic skeletons in basic, bold outlines and a crescent moon above, also in a simple style. The background is solid black, with a thick gothic border around the design. Ensure all elements--Nyx, the skeletons, raven, and moon--have bold, heavy lines for a striking and dark visual effect.