In 1980, there was an undercurrent in Hogwarts. The "Twilight Marauders" formed by Yegrit and Sirius Black triggered the prophecy mechanism that Grindelwald had buried for half a century while wandering in the Forbidden Forest at night. The image of the young Dark Lord emerging from the stone archway actually gently called out his adopted son's nickname. When the broken Ravenclaw diadem screamed in the secret room on the eighth floor, the black magic flowing like asphalt revealed the chilling truth for the first time: the so-called Horcruxes were just the prelude to a greater curse.
Mission: "The purest light must be born from the deepest darkness."