Welcome to Librarium Online!
Ok, so here's something I did fairly recently. I don't know if there are any techniques in particular for me to talk about here, he's got a lot of different things going on.
Overall, I was going for a very worn feel, and I think I pulled that off.
I put up a blog entry on how I did the lightning arcs for him.
Anyway, here he is:
Commentary is always welcome.