There is the copper chest, the silver chest, the gold chest and the platinum chest. All chests have different contents. They can be opened with keys obtained from bosses, dungons, guild quests, duel rewards or even in adventure. Copper chests can also be opened by voluntarily watching an advertisement, silver chests for gold and gold chests for jewels.
In the “Treasure Chests” section you can see what you can get from each chest by clicking on it.
The contents of the chests are adapted to the areas. You will automatically receive the materials of the current area. By changing the area in the selection, you can also get materials from silver and gold chests and materials from lower areas.