Originally Posted by Blizzard Entertainment
•The Hunter 2T15 bonus is a chance to summon a Thunderhawk. That Thunderhawk will assist you, and will always cast 5x Lightning Bolts for 16k to 24k Nature damage. Its damage will scale with BM mastery, and will not scale with Survival mastery. However, the proc chances (which are Real PPM) vary by spec: 0.7/min for BM, 1/min for MM, 1.2/min for Surv.
•The Hunter 4T15 bonus is affected by Survival’s mastery, cannot trigger Wild Quiver, and procs at a rate of 3 RealPPM.