Dungeons were unusual to say the very least.
The most common dungeons were the normal dungeons in which there would be a portal leading to a vast land that had monsters and treasures hidden deep within. Each of these dungeons had a Boss monster that you could defeat and would respawn after a fixed amount of time.
The only way to completely get rid of dungeons was to make sure the Dungeon Core, which the Boss monster protects is destroyed.
Destroying it releases an outburst of mana which may or may not materialize into priceless artifacts.
How this occurred no one truly knew, but no one also complained.
However, the destruction of the Dungeon core very rarely happened in low-level dungeons.
Most low-level dungeons were turned into field dungeons, In which humans would ban any hunter from entering and killing the monsters.
