Turns out unforgivable curses are totally forgivable! Breaking into people's homes and robbing them blind? Completely fine! And committing mass murder is just a fun prerequisite for becoming Hogwarts' star pupil.
Took half a star for the Guarma section and for Arthur having literally the worst stamina of any human being ever. That being said, it's a masterpiece y'all. RIP to Snowdrop, never was there ever a better horse.