Perhaps you will be interested
This item is a reward from the World of Warcraft Trading Card Game.
It makes the same noise when a warlock summons an Imp. The imp shakes up and down for a few seconds, and then announces a fortune to your whole group.
Imp in a Ball also can be found listed on the Black Market Auction House.
Here you can buy Imp in a Ball for EU or US Servers.
Also you'll get guide for receiving Imp in a Ball
After patch 10.2 might will need character transfer for access to BMAH