Dragon Guardian is slightly confusing me... all difficulties are 5 battles and 15 stamina? What is this? Usually they get more expensive/more battles as they get harder... Someone please run it and update us how hard/what colours it is! I assume that's the green stone knight dungeon, cool cool.
I just tried it on Expert and it was very easy with an ADK team, I imagine even easier with a red team. Like the light dungeon before, there were 3 Dragon Knights at the boss stage, but they were very easy to defeat and I did get a Mystic Stone Knight drop. Two +1 eggs in the single run as well. Enemies were all wood element and consisted of Earth Knights and Taur Devils (not demons, so quite weak). I imagine there are one, two and three bosses for novice, adept and expert respectively, but I'm not 100% on that. Going to sleep now.