WoW API: GetMasteryEffect
Returns the effect of player's current Mastery.
mastery, coefficient = GetMasteryEffect()
Returns
mastery
- Number - Current effect of the player's mastery, typically a damage increase percentage, or a percentage chance to trigger some specialization-specific effect.
coefficient
- Number - A spec-dependent coefficient multiplied onto the player's raw mastery effect (as returned by GetMastery) to yield the actual effect of the mastery.