Main Missions are marked with Crossed Swords on the World Map (see image to the right). When approaching a location where a mission is available it will automatically be assigned to the player.
While you will be tasked with killing a Boss, it may be waiting at the heart of a Dungeon or simply loitering on the map by itself. Completing the mission by killing the Boss will reward you with Platinum Coins and Experience.
Note: If you go to sleep, new missions will generate. This allows players to explore the same region indefinitely. New missions will also generate each new game day.