You might also consider changing your palette some: pure greys, while great when used to blend wildly different hues, aren't very interesting to look at. Consider tinting the sword to a more bluish color or giving it a reddish glow. Anything to make it look more interesting. You might even want to try showing yellowish highlights and blue shadows to hint at a yellow lightsource like a torch or bonfire. As for the red, it's very bright and not really the color of blood. Make it a little less saturated (saturation is distance from grey and more saturated colors stick out more like vibrant red and blue flowers under bright light, while neutral or dull colors are rather unsaturated) and also darken it just a little.