When you play with this expansion, a number of Side Quest gets opened. To complete them you'll have to do some nice things like "Be defeated" or "Defeat a Roaming Monster without using rerolls (ha!)."
But Why? You wouldn't normally go out of your way to fulfill these annoying quests, right? Here's the catch: as you complete them, you gain Levels! Keep in mind they're open information so other Heroes may have their eyes on them, too!