Collectible Card Game Headquarters

I've got the missing card art auto download setting on, but for some reason my lands are all blanks. Is there a way I can manually add them? I know how to get to my card art folder, but how do I know what to name the files?

Hi,
in your Forge install directory, in the subfolder /res/editions/ you'll find .txt-files for each set, which'll list every cardname, including (basic) lands.

Hope that helps!
K.