What do you think about new hard difficulty?
As others have said, there are going to be four difficulty levels. Explorer, Classic, Tactician, and Honor Mode (names subject to change). These will be selected on the different panes of the mural/painting that we can't choose now. Alpha only has explorer (easy mode) and classic (normal mode). None of the "hard" modes have been released yet and the difficulty levels available are going to be balanced throughout the Alpha.
