Efficacy

Efficacy
Observed effect: (tested on a randomly generated greater efficacy clicky just before Update 21) See Also:
 * For example I have a Efficacy effect that gives +12 Spell Power. Now my spells do 12% more damage compared to the base damage.
 * The duration is longer than advertised. It lasts 3 minutes per charge.
 * Resting does not end the effect.