Word of Nurturing, Critical

Level: 5
Duration: 5 rounds (normal) or instantaneous and concentration, up to 1 round (reverse)
Saving Throw: None
Normal: Your ally experiences a tremendous rejuvenation as healing energy soothes her wounds.
A network of ropy strands of green energy heals your target’s wounds with startling rapidity. You grant a creature fast healing 15.
Reverse: Massive rents and tears appear on the body of your foe. 
You unmake a portion of the subject’s being as you utter the reverse form of the life-giving words. You deal 8d6 points of damage to the subject. If you concentrate for 1 round (a standard action), and the subject remains within range, it takes another 8d6 points of damage at the end of your next turn.