Dungeons and bossfights are usually accessible from the Tower Levels and the Player can choose the difficulty of the dungeon before entering. There are two types of playmodes for each dungeon:
Enemy Health and Damage are scaled upwards for each Level. The itemlevel of all dropped Equipment is raised by one per Level.
Heroic mode always unlocks the highest itemlevel of Equipment. In Addition, a Bonus on Magic find is applied and increased per Level.
Higher Heroic Modes can be unlocked by defeating bosses and some dungeons offer new Areas and Bosses on Heroic Mode.