Anyone standing at the lip of the crater of the volcano would have been surprised to hear a strange sound echoing up from the depths. It was a sound unlike any other that had been made in human lands at the time of its discovery. Indeed, the primitive men that ranged the mountainside believed the gaping hole was inhabited by strange spirits, risen from the underworld, and avoided it when possible. Things changed when the duergar emerged from their mountain home and brought trade to the land. Itinerant humans no longer eked out a meager existence on the sparse mountainside.