Rarity indicates item qualities beyond "common", seen by the color of an item's name and the presence of stars in the bottom of the item's description popup. Together with Power level, rarity is the factor which determines the overall effectiveness of an item. There are several tiers of rarity, and as can be expected, higher tier rarity items are usually dropped by higher level monsters.
|Common||-||-||Common items are the lowest in quality|
|Uncommon||Emerald||Most commonly dropped by +1 creatures; may be bought in shops.|
|Rare||Sapphire||Most commonly dropped by +2 creatures.|
|Epic||Ruby||Most commonly dropped by +3 creatures; Epic items often have lore names, such as "Polished Iron Dagger of Xemi".|
|Legendary||Diamond||Most commonly dropped by +4 creatures; Legendary items often have Lore names, such as "Legendary Iron Shield of Kiba".|
|Mythical||-||-||Mythical items are generally regarded as leftover developer items not yet removed from the game.|
Each tier of rarity has several known affixes, for example "Artless" denotes a common-tier rarity, while "Polished" can denote either rare or epic tier rarity. As the second example demonstrates, the affixes are not exclusive to each tier.