So I was bored and read most of this story. The beginning was rather interesting. There were enough interesting new takes on old ideas. My favorites being the sacrifice based blood magic and scenes of Harry having to deal with the Killing curse shattering his soul and having to heal it. Also the way it was implied that Slytherin's portrait really made Voldemort and is sort of doing the same thing to Harry. It promised an interesting twist on the usual dark!Harry tripe where he is just killing/torturing people and there being zero repercussions from it. And than it all fell off the cliff. The 'sacrifices' that were needed for the blood magic were essentially just Harry bleeding a little bit and than feeling woozy for a day or so, mechanically identical to him just reading some old book in other stories, as there were no real long term concequences to the 'sacrifices'. Besides the one time the author decided that there needed to be a big dramatic moment and for some reason the cost went way way up for a single, rather minor advantage. (It was also rather nonsensical as the advantage he gained was rather counter canon and so felt pointless.) The whole soul shattering thing also went away after the first instance with Harry and Fluer just running around throwing around killing curses and Crucio's like they were candy. In the end there was nothing Cadmean about this victory as everything Harry gave up was done so willingly.