Mithril Chest
Among the treasures that can be found in Feo, are mithril chests. These are very old trunks, which can be found when fighting monsters and taking part in various events. To open the trunk you must have a special key. The keys can also be found when fighting monsters in Feo, and participating in events or buy in the Premium Shop.
You can find one of the following prizes inside the Chests: