Still too OP. It would really drive people away from enabling it and whats the point of adding something that everyone would disable?On the other hand, spirits seem more focused on blessing/cursing many people and seem to be unable to even have the offensive capabilities of a earthbender. So, a spirit killing someone and at most of the time only removing 2 hearts, with this being cannon, and spirits being mostly weak, this isn't that overpowered of a move in a spirit's arsenal.