Holly Summit AKA Miss Misogyny, uses magic via a rolling pin. Not much thought was put into this character, she was mostly just a throwaway villan for UltraWoman. The woman is just crazy and weird, unlike other villains, she does not have any backstory.
Currently when creating new villains, they will be more interesting with their own motives and origins. Honestly, Miss Misogyny is my least favorite villan as she is bland and has WAY outlived her usefulness, and will most likely be retconed.
Also Black Lynx is a very confusing character to write, she was originally intended to be a catwoman-like character but started to take on a Batman role. However I later had doubts about her and was going to either write her out or kill her, but now I will probably Retcon Black Lynx too.
Soon a post will be made about the current status on what is and isn't cannon for the Justice Syndicate. In this post characters will be erased and events changed, note that this is to make things simpler for the future JS stories, and to help make them less confusing.
The current Justice Syndicate storyline: "The Catalyst", will change the superhero world(that's all I will say without spoilers).
-TripleG