[HP]I Heard There Is My Legacy in Hogwarts

In 1888, I transferred from Rhea Lucalia to Hogwarts School of Witchcraft and Wizardry, experienced countless battles, and became an ancient magic master of dark magic (crossed out). In the process of studying ancient magic, I traveled through time again. Walking through the corridor, I found that I was a hundred years in the future. "The black shadow has descended on Europe, and the greatest enemy of the magic world will return under the guidance of the prophecy and ascend to his throne..." Wait, that sounds familiar. Is this legendary villain actually myself? Also, what is going on in this era, where someone who knows two magics can become the Dark Lord? Then don't blame me, the ancient origin black magic master, for taking action. PS: 1. It's been a long time since I finished playing Hogwarts Legacy but I decided to write one. The protagonist, the undercover master of black magic in the Lion Court, has a ceiling in combat power and can fight without saying much in this series. 2. The related game "Hogwarts Legacy" (HPL) contains a few spoilers. The protagonist's timeline is the Grindelwald era - the Legacy era - the Harry Potter era. Purpose: We fight for peace and stake our loyalty