The season is once every few months, and there are some special patterns. At the end of the season, the characters enter the eternal world, which is the standard mode.
Generally speaking, this kind of game is the most interesting to follow everyone in the season.
But also can play the characteristics of the season.
As for the expert world, it is a life mode, which directly enters the eternal world after death. After the expert world died in the current season, it also directly entered the eternal world. The expert world of the season is synchronized with the world of the season, and the unique gameplay is the same, depending on whether it can be resurrected after death.
The eternal world is the so-called old district, which is generally used for providing for the elderly (that is, not according to the season and not playing expert mode). You can play slowly here. In addition, through long-term accumulation, it is possible to obtain better equipment. Then use it to test various genres (after a few seasons, there will be many advanced characters in the eternal world.