It has a very nice use of darks and whites, and the blue paints on him clearly stand out.
The font is very nicely done too, better than any font I can do.
However, the glow of skulls around his hand seem very week and look like they sit in a layer behind the hand, A white glow on the hand itself could easily help this, as it feels like his hand is just raised for no apparent reason.
The hand itself feels nearly like a blob of color, some sort of fine tiny line work could really help on it, just to define whats what from what.
I do like the background tremendously along with the curving of it almost like it has a center of gravity to it, similarly to the "Fish Eye" technique some artists use.
And the fact the resolution on this is so small also breaks my heart... A 1000x1000 resolution at least would have been nice.
Nevertheless it seems to be a step up from the other art of yours that I viewed.
Well done if I may say.