I also had a stab at the Dominance War III
This is my entry - a Samurai type invoker guy.
His name is Yamiten which basically means
"dark heavens". 闇天.
His artifact weapon is a coffin which holds the darkness inside before it's unleashed upon his foes obscuring the sky...
My original CGtalk thread is here btw: [link]
You can find a bunch of other pre sketches, some of which I might upload later here as well...