Well those're somee pretty awesome sketches you've done on the concept pages. Good work, truly. I hope to see obsidian and master sets soon, and hopefully more types of weapons later ^_^, well, if you continue your work that is.
May I ask what type of photoshop you're using? Or is it just a version of the PhotoShop =\? Either way, I just like that instead of thick colours, there is some texture to it so it looks pretty sweet in the end.