I think that I have found a new, end negative investure manifestation: The Returned. My reasoning is this: The Returned have to have a breath a week or they die after consuming their divine breath. Unless they get more than one breath per week or buy a bunch of breaths, they cannot use their breaths for awakening. Also the breaths are used up/decay once in the Returned, similar to hemalurgic decay. I think that this is a end negative system because you end up with less investure than you started with. Any thoughts?