Aura

Aura is a type of skill used by Paladins, Druid's spirits, Desert Mercenaries and certain Unique Monsters. It passively affects either the caster and all nearby allies, or all nearby enemies. There are two types of Auras: Defensive Auras and Offensive Auras.

An example of an offensive Aura is the Holy Freeze Aura, which slows any affected target and inflicts Cold damage. An example of a defensive Aura is the Paladin's Resist Lightning Aura, which increases the Lightning Resistance for the Paladin and all party members.

A single target may be affected by more than one different Aura, though only one graphic will show at a time (the graphics will alternate). Same Auras will not stack, a weaker one being suppressed.

An Aura is a semi-Passive skill, in that it usually requires no Mana (although Prayer drains Mana over time while active), and can be kept on as long as possible. In return, Aura is only active while focused, occupying the RMB skill slot, and is dropped immediately when switched. Only one Aura of any type can be active per Paladin at a time.

Some Auras provide a minor passive bonus when inactive; an example may be Resist Fire, which still increases the maximum (not current) Fire resistance by half of usual value even when turned off or replaced with a different Aura. Many Auras also synergize with other skills, enhancing the Paladin's attacks even when turned off.

A single caster can only have one Aura active at a time. However, auras different that the skill-granted one, granted by items will be active even if item wielder has another Aura. If multiple items grant the same Aura, it will be active as a single one, with levels combined. It can lead to powerful combinations, such as stacked Holy Shock from double or Holy Fire from double  and.

Items with auras
The following table contains items which grant auras, and can be used to plan stacking them by looking at which slot combinations are possible.

Diablo III
In Diablo III, Auras partially return in form of Mantras and Crusader Laws.

Unlike Auras, these skills have both passive and active effect, providing a bonus that can be greatly increased for a short time by manually activating the skill.

's Frailty curse and Devour skill can be used as auras with respective runes.