Instances inside the game are divided into four levels of difficulty: simple, ordinary, difficult, and real;
And there are level restrictions for entering the instances. If you surpass a certain level, you cannot enter that specific instance. For example, if a player surpasses level 18, they can no longer enter Frost Cave Secret Realm.
And when one first starts to conquer an instance, they have to start from the simple difficulty level. Only after successfully clearing it, they can choose the ordinary difficulty level, followed by the difficult one. After conquering the difficult level of the instance, one can enter the real difficulty level. It is said that once you successfully clear the instance at real difficulty level, the instance will no longer reappear.
However, Song Jian has not heard of any instance at the real difficulty level being successfully cleared;
