I didn't know about Wtactics. Is it from the same devs?
While I see the value of Wesnoth, it's not my kind of game. Now a constructed card game, that I enjoy!
Browsing that website, I think the game rules should be easier to find.
I think it uses the art, or at least was heavily inspired... seems to be something there, but the original programmer moved on to do this ccg instead. https://github.com/davewx7/Citadel (It's still a work in progress, though.)