Rare items are items that can be used by combining gems and can be found by playing games at the Forest or Wizard's Domain. These kinds of items can be unlocked at the Wizard's Domain.
Also, there are points that depend on the kind of rare items you unlock. Rare items can give you a medal as well, but it is only for Premium Members.
Rare items consist of 6 categories: Rare, Very Rare, Ultra Rare, Legendary, Mythical and Otherworldly.