Quote Originally Posted by Auryan View Post
It could be the opposite of WW where the lower your HP, the higher the potency. Kind of like an emergency heal when WW won't cut it.

Of course this a hunch based on the warmoura and how it only heals when a nearby enemy is lower than 50%.
In ffxi it was an aoe cleanse too, this is how they add unique things to blu, remove fey caress from selene and give it to blu with a heal attached for a "new ability"