However, the highlight of the expansion is the adventure system. Once a group has formed (with four members being the minimum, and there must not be any more than six levels difference between the lowest and highest members of the party), one member approaches an adventure recruiter and requests an adventure. Adventures come in the form of slaughters (killing X number of monsters), rescues, collection missions (bring X number of a certain item back) and assassinations (kill a specific monster inside the dungeon). If an adventure doesn't appeal to the group, it can be turned down and another requested. Once an adventure has been accepted, the group has 30 minutes to get to the entrance of the dungeon and start the adventure. As soon as a character in the party enters the dungeon, the clock resets itself to 90 minutes. If the clock runs down before the goals have been completed, the adventure is a failure. However, the group will still be able to hunt in the dungeon for another 30 minutes before getting booted out.