The way you've shaded the dark side of the blade makes it seem like it's on a completely different level to the other, rather than simply a slope angled the other way. Get rid of the lightray, since shadows don't simply darken all lightsources. Check out Adarias' sword, to make it seem sloped/angled like his you need to subtly lighten the areas that are closer to the middle of the blade, if that makes sense. This is because the light will 'pour' over the ridge slightly, to put it simply. Also, by neutral midtone i meant a colour like the background colour of Pixelation posts, something that is muted and won't get in the way of your work by it's intensity. Remember, it's a background colour.