Effects of Engine of Haste, Engine of Mastery, and Engine of Critical Strike increased by 100%.
Every 2 sec sec, the Heart of Azeroth empowers you with 100 Haste, Mastery, or Critical Strike. After reaching 10 stacks of either Haste, Mastery, or Critical Strike, the Heart of Azeroth temporarily overcharges, doubling the effects of Engine of Ceaseless Progress for 8 sec, after which the stacks are removed.
