Dungeon Breaks.
It's an occasional event that happens once in a while that involves specific dungeons in the game. The dungeons are selected based on the average level of the player base, that way, the players will be capable of clearing them without having any problem that they can't clear the dungeon because the level of difficulty is very high.
Majority of the players are about level 80 to 100 so my guess is that they will be either choosing the level 85 or level 90 dungeons across the Resurgia, Sandurk and Aquagius to clear. However, this news is quite a blessing to me.