Master of the Cold Dark [Trait] Quest: Gain 1 Blight every time a Hero is rooted by Frost Nova or Chains of Kel'Thuzad. Reward: After gaining 15 Blight, the cooldown of all Basic Abilities is reduced by 2 seconds. Reward: After gaining 30 Blight, gain 75% Spell Power. Kel'Thuzad Patch changes Edit (Patch September 5, 2017) Note: Added. Retrieved from "https://heroesofthestorm.fandom.com/wiki/Master_of_the_Cold_Dark?oldid=43392" Categories: Kel'Thuzad ability Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.