Salazar Slytherin was resurrected in the thousandth year after his burial. After waking up, he returned to Hogwarts incognito and was a new life, and then he was shocked to find that the family that was keen to marry Muggles or simply Muggles claimed to be purebloods. Out of nowhere, the madman who pretended to be his descendant became the Dark Lord that people talked about, holding up his own banner to promote radical ideas. While all kinds of spells became bells and whistles, the bodies of wizards were extremely weak, even the descendants of Gryffindor. Slytherin: Voldemort, I think you're a bit extreme - and how did I not know I built a chamber in the castle? Wait, you can't mean the basement I used to teach, right?!