Was talking in the discord about this and I think it's a pretty good idea.

Skill: Reverse
Target takes damage to healing and receives healing from damage for a limited time
Requires full Petals and consumes all Petals on use
Up time: 5-10s
Cooldown: 3-5minutes

It'll make petals somewhat useful and can be used on party members or enemies....

Additionally, full heal skills would not would not work on this cooldown/buff, only the base heal skills of each of the three healers.

Ideas? The thought car about on how they could introduce something unique for WHM other than a new cure/stone spell and this is truly one of the more unique buffs in the franchise.

Additionally, if it were introduced it could be an occasional raid mechanic of bosses and whatnot that healers have to watch for.... which would segwey into the additional thought of introducing a dispel ability of sorts