This piece was made by the Master Conjurer and calls upon the ancient Oracle of Delphi. If you want to know more in-depth what the Oracle of Delphi meant to ancient culture, I would suggest doing a quick internet search. Essentially the Oracle was consulted by rulers before making decisions about their lives. The people who consulted the Oracle knew better than to go against what she said because she was always rigt.
This piece holds a connection to the Oracle at Delphi. When you meditate with this item, the Oracle will give you visions of your future-- what it will be, what it won't be and everything in between. That is what this piece allows you to do. When you wear this piece it will all be shown to you, but not only will it be shown to you, but you will also be able to petition the Oracle to change the aspects of your life that you do not like. You can also use this power to add things that you would like that you don't have. Either way, the Oracle will work it out for you.