Quality bonus

A quality bonus makes a character better at an action through sheer good workmanship of the item in question. Like most bonus types, multiple quality bonuses would not stack, only the greatest would takes effect, but there is currently only one effect that uses a quality bonus: the epic Elemental Evil set.

Epic Elemental Evil Set Bonus
When both a tier-2 upgraded epic weapon and epic armor are equipped, the set grants a +20 Quality bonus to Melee, Ranged, and Universal Spell Power.