The Crazed Blood Queen Bathory literally became a weaver of not just bodies but also souls of those she tormented. All of the beings that is currently in her body right now are those that were tortured by her and sacrificed for her leisure activities. She always did not like that her enjoyment becomes less when the toy dies which is why she thought that she could use her abilities to weave the souls back into their bodies.
At first, the Crazed Blood Queen Bathory was unsuccessful in her attempts but her twisted desires and wishes manifested into reality. It manifested into reality, but it was not something that even she expected as there was an everlasting consequence. She was able weave back the souls of the dead to their bodies, but this also meant that she got a heavier price for doing so.
