I really like this design. The black outlines effectively frame the body and make it look like the woman featured has been swallowed up by darkness. It's really cool! I can't tell whether the top bit of blackness where the head should be is horns, or the outline of her head. I kind of like how you have left that to the viewers interpretation. I think you could improve a little on this by making the black lines less symmetrical or have a little bit of variation in the shape of the blackness. All in all, this is a really neat composition, and I could see this being a real tattoo on someone. Great job!