Benediction

From WoW: IncGamers World of Warcraft Wiki

Talent: Benediction
Effect: Reduces the Mana cost of your Judgement and Seal spells.
Statistics: Rank 1 = -3% Mana cost, Rank 2 = -6%, Rank 3 = -9%, Rank 4 = -12%, Rank 5 = -15%.