Aspect of the Viper
The hunter takes on the aspect of the viper, instantly regenerating mana equal to 100% of the damage done by any ranged attack or ability, but reduces your total damage done by 50%. Only one Aspect can be active at a time.
It's sick. My hunter can go from empty to full mana in 5s with 50% damage and 2 GCDs. I should make a Viper/Hawk castsequence macro.
In other news, both Judgement of Wisdom and Judgements of the Wise were nerfed into the ground, pretty much eliminating Retribution mana regen. Hopefully, Blizzard has something similar to the new Aspect of the Viper up their sleeves.