What is a Dragon Ball?
Have you ever wanted an upgraded item but you can't get past +2 because it always fails after that? A dragon ball basically makes upgrading easier. Perfect. 100% Success.
How to use a ball?
Insert a Dragon Ball in the slot for upgrading gems while upgrading your item. Keep in mind that you must still have the requisite amount of Immortal Stones to upgrade your item. The number of stars on the Dragon Ball indicates the limit of the safe upgrade guarantee of the gem.
A Nine-Star Dragon Ball guarantees safe upgrading for +1 through +9. Blue-Sea is safe until +10, Prismatic is safe to +11 and Burning-Red is safe to +12. Once you use a dragon ball, the dragon ball disappears.