Each of the Druid's damage, healing spells and auto attacks has a chance of causing the caster to enter a Clearcasting state. The Clearcasting state reduces the Mana, Rage or Energy cost of your next damage, healing spell or offensive ability by 100%.
Buff
Clearcasting
Magic
Your next damage or healing spell or offensive ability has its mana, rage or energy cost reduced by 100%. 15 sec remaining