Mastermind (Season 2013 Mastery)

Mastermind Tier 2 utility mastery with 3 ranks.

Effect per rank

 * Reduces the cooldown of Summoner Spells by 4 / 7 / 10%.

Requirements

 * Requires 4 points in Utility.

Trivia

 * In season one and two, Mastermind was the final tier in the Utility tree and provided 15% cooldown reduction for Summoner Spells.