You're having your usual evening drink in the Ruffled Feather when you happen to fall into conversation with a tough old dwarf. He seems to know many tales about the nearby lands. "Ah!" he cries. "You don't know the legend of Black Knife Dungeon? I will tell you!" He launches into a meandering story with a lot of digressions, and it's hard to follow the thread. You're able to glean that there is (supposedly) a valuable relic buried deep inside the dungeon. Eventually he starts to nod. "A steadfast adventurer may find it," he murmurs, "but first, seek Blornang's Hall." With that, his head falls on the table, cushioned slightly by a coaster. Hmm. Maybe this is worth looking into. You are an adventurer, after all.