First of all, this piece is great ! The details are remarkable and the way you make use of the background is very well done ! I am not an expert in drawing human poses (but i want to be , so I did a bit of selfstudy) but I found that if you want to express dynamics ( like ready to fight ) the upper body should be slightly tilted. That way your drawing looks more 'ready to kill' then 'pushed to the corner'. Anyway, thats just a minor piece of hopefully good advice , and I think you are one of the best entries ! Keep up the good work :)