I received what seems to be a ridiculous question from a friend of mine, however this might be possible by the rules: Suppose that for whatever reason the Heroes wish to reach the final battle ASAP. The Heroes could remain on the first level of a dungeon, continuously killing each other until the Overlord gets close to cycling his deck twice. Then they move to the next level and repeat this for the second and third level, thus earning the Overlord a ridiculous amount of XP and likely forcing the final battle before the Overlord can upgrade his Avatar significantly. Besides being absolutely anti-climatic and boring, is this possible ? Am I missing something ? One could argue that while the Heroes are hurting each other, the Overlord could be massively spawning to stop the heroes from reaching the portal to the next level. Any other suggestions ?