For this piece, there is way too much background, particularly since its empty.
You put a lot of detail into the scythe itself and the blood, but the minimal detailed skull kind of kills the picture. Not only is it merely an outline with some color fills, but the skull has no shadow, and the break between skull and scythe is evident on the top left corner of the shadow.
Because you left much of the outline showing at the end of the blade, the blade appears as if blood splattered onto it rather than the blade piercing flesh. It is okay to cover up the lines with solid blood at the blade tip.
The subtle shades on the blade really makes the scythe look ominous, so good job.
~Depes~