The Guinness World Records considers Countess Elizabeth Bathory to be the most prolific female serial killer. She was accused of torturing, mutilating and killing around 650 women between 1585 and 1610. Even though there was substantial evidence against the Hungarian Countess, she never faced trial because of her family’s influence.
Legend has it that Bathory had vampire-like tendencies. She reportedly bathed in the blood of victims in an effort to retain her youth.
Honestly don’t even want to post all the terrible things about her. I’ll start with “borrowed” tons of money from her parents, put them through hell and hardly made any effort to be there for them at all when they got sick and were dying. I’ll skip the boatloads of other fucked up shit.