“It was jet-black. A shade of black so deep, your eye just kind of slides off it. And it shimmered when you looked at it. A spider, big as death and twice as ugly. When it flies past, it’s like you hear a scream in your mind.” So goes the description of a Shadow Ship from Babylon 5. I forget how it was first revealed, but it seemed every time the cast encountered one, they all seemed to be filled with dread and foreboding.