I'm quite excited to see how she will get her revenge. Will they just crumble under the weight of gossip and social isolation? Will the Duchery find out about the sacrifices and wipe them from existence? Or will she use the very power they are renowned for against them?
Perhaps all of the above! That's what I'd put my hopes on.
Does anyone else feel like when she finally gets her revenge that she will lose all her powers since the only reason she has them atm is cause the shadow wants revenge
Neither of the murderers were serial killers. They were mass murderers. Serial killers have individuals they kill or very small groups. Mass murderers kill as many as possible within a time frame. Timothy McVeigh, Dylan Klebold, and Eric Harris are not serial killers. And Ted Bundy, John Wayne Gacy, and Harold Shipman are not mass murderers despite the body count. Serial killers, as you said, don't need mental health treatment because they aren't mentally ill, just depraved. Mass murderers believe that they will bring on change or justice by there actions. There is definitely something wrong if you believe murdering people, who have little-to-nothing to do with the issue, will fix an issue.