The first impression I'm getting right now is that you have your lightsource backwards. If the lightning is going to be that bright blue lightsource you seem to be wanting it to be, his armor should be lit up more on the side the lightning is on. Right now its on the far side that wouldn't be as affected.
Nice add a few more colours to the armour might be better.
I'd recommend spending a lot more time on the energy staff. At the moment, it looks very rough and unblending--more like a bunch of random brush strokes than a sizzling beam of electricity.
Hi, I would recommend more practise with general anatomy first before taking on such a character. That would help you create more dynamic poses thus making the character alot more interesting to the viewer. But some crits on the current character: there obviously isn't too much detail put into the armour or the weapon. Although to me so far the weapon is the most appealing to me. Like somebody had already mentioned, the light source is a bit wonky. I also think the flat black in which the character is placed doesnt help. Keep practising and good luck.