Intensity Druid

From wow.incgamers.com

Talent: Intensity
Effect: Allows a % of your Mana regeneration to continue while casting and causes your Enrage ability to instantly generate rage.
Statistics: Rank 1 = +5% and 4 Rage, Rank 2 = +10% and 7 Rage, Rank 3 = +15% and 10 Rage.