On the other hand, this phenomenon is understandable – as in this world the magical energy is transferred much harder, which makes self-improvement in such a way almost impossible. Cultivation in either humans or ghosts is based on taking the energy in, which is out of question here, as even to free your own magic without self-harm you need a conductor. I am afraid to think what a mash the body will transform into, if you try to take someone else's magic inside.