The plugin has two main commands:
/case
With this command you can add cases to any player.
/caseopening
With the parameter "chest" you can rightclick on a chest and make them to a "Case Opening"
With the parameter "manage" you can manage the case opening:
This is the inventory, it shows an "ADD-Button" to add items and If you have already added some items it will be displayed there.
Click with an item on the emerald to add the item.
In the chat you will have to input the chance to get this item in percent.
There you can see all the items.
All items have a description:
Ignore the index lore, you can see the chance in percent of the win rate.
To win something you must have an item that is 100%.