Master of Elements

Master of Elements is a popular PvE talent for any talent build. It restores up to 15/30% of the mana cost of any spell that critically hits one or more targets (so AoE spells such as Flamestrike, Cone of Cold and Blast Wave are affected by this talent). Since most mages critically hit between 20 and 40% of the time this talent is equivalent to an effective mana cost reduction of all spells which can critically strike.