You consider yourself a makeup pro, so there's no way you're going to be a basic witch or sexy cat for Halloween this year. No, you want to go all out. Turn some heads. Maybe scare a few people (because you're scary talented!) If this sounds like you, you should definitely rock a grayscale beauty look this Halloween. It is neither for the faint of heart nor the beauty beginner, but don't worry: we're here to help you master this creepy-cool costume.