I have a GM miner, and she uses the Target by Resource action for her mining macro. With a shovel as the resource, one of the choices is "Digging Graves". (This is in addition to "Ore" and "Sand".) I tried to search the net for what that meant, but all I could find was a quest which one of the freeshards had instituted. So, what's the story with "Digging Graves"? Is there a reward? Are you likely to dig up a Lich Lord? Or is it just an unimplemented feature?