Just had a question, when a Returned consumes a Breath, is it a property of their body that does so or the Divine Breath itself? It's been contentious in the community. If it's specifically just their body and a hemalurgist were to spike a Divine Breath as indicated was possible here*, would the hemalurgist not need to consume a weekly breath?
That's a very interesting question. The thing that requires the Returned to continue gaining investiture is their nature as cognitive shadows--they are dead, and in this case, need a power source to continue persisting in the physical realm. The Divine Breath is part of this. Imagine the Divine Breath as the thing that Infuses their soul, making it persist initially, and then and sticks it to the body. So if you stole it, but you yourself were not in need of being kept alive, I would say that you wouldn't need to be fed a new breath each week to maintain the Divine Breath.