Hey Jason. Long time no see. Anyways, I had this as my desktop for a little while. I was cruising WotC's site a little while back and there it was amongst all the other stuffs. Anyways, catch up with ya later.
Superb details and poses. You portrayed the movement and intensity of the moment really well.
I'm not very experienced with composition so take the following critique with a grain of salt. The figure in the far background has a lot of contrast and so it takes my attention away from the action (where I want it to be). It looks awesome nonetheless, but as a second focus in your picture it might look nicer if it's less pronounced.
Despite my critique I think it's an AMAZING piece. I wish I had your skill!!! Keep it up!