What is the Crystal Ball?
 
Every time you get a duplicate Custom Dice, you will get a ticket that will let you look into the future...
 
You will be able to choose 1 of the 3 offered Custom Dice that aren't in your collection.

NOTE: In case you're only offered less than 3 Custom Dice, this means that you have almost collected all the current available dice in the Crystal Ball. No worries! We add a new set of dice in a scheduled manner. We appreciate your patience!

Where can I find it?
Inside your inventory, look for the "Tarot Cards" tab