Things are not going right
As a healer, you may be a Priest, a Paladin, a Shaman or a Druid. To heal is your main job. However, as a healer, one soon learns that sacrifices neither need to be made, because Jade Dynasty Gold is not infinite, nor are our heals all instant-cast with huge instant hits. And sometimes as a reward for our healing, we get group-attacked by monsters if things are not going right accordingly.