Aura Mastery

Aura Mastery
Aura Mastery 2 minutes cooldown Instant cast Causes your Concentration Aura to make all affected targets immune to Silence and Interrupt effects and improve the effect of Devotion Aura, Resistance Aura, and Retribution Aura by 100%. Lasts 6 sec.
Usable by
Class	Paladin
Properties
Type	Defensive
School	Physical
Casting time	Instant cast
Cooldown	2 minutes
Talents
Talented	Yes
Talent tree	Holy, Tier 5
Other information
Ranks	1
Related buff
Aura Mastery Concentration Aura provides immunity to Silence and Interrupt effects. Effectiveness of Devotion Aura, Resistance Aura, and Retribution Aura increased by 100%. Duration: 6 seconds

Aura Mastery is a Paladin ability, you will need to spend points in the Holy tree to get it.

Patch changes

Patch 3.3.0 (08-Dec-2009): This effect of this talent has been reduced in duration to 6 seconds.
Patch 3.1.0 (14-Apr-2009): Now grants anyone affected by Concentration Aura immunity from Interrupt and Silence mechanics, and increases the effectiveness of all other auras by 100%. Lasts 10 seconds. 2-minute cooldown.