Mary the Macabre

Not all of Elizabeth Bathory's victims died.  Unbeknownst to even her, some of her victims that were tossed out as dead, were not as dead as what some people thought they were.  Well, okay, the were technically devoid of life.  I guess you could call them living dead.  One of these young ladies, named Martha actually went on to become powerful in her own right.  As the story goes, Martha was tossed out with the trash so to speak and Bathory had absolutely no idea that she was still kind of "alive"  It seems that she received a transformation after she was cut open with Marie's blood alchemy tools.  When she woke up in her new form, she decided to gain powers and magic of her own.  She busied herself musing over the powers of ether, gaining an insatiable appetite for the dead.  What she had originally planned on doing was gaining enough power to surmount a metaphysical attack on Elizabeth Bathory, to take her down for all the lives she took.   However, as her existence wound on, she en