Convection

From WoW: IncGamers World of Warcraft Wiki

Talent: Convection
Effect: Reduces the mana cost of your Shock, Lightning Bolt and Chain Lightning spells by a %.
Statistics: Rank 1 = 2%, Rank 2 = 4%, Rank 3 = 6%, Rank 4 = 8%, Rank 5 = 10%.