The God of Flesh and Blood Magic at Hogwarts!

Thorne Black, traveling through the world of Harry Potter, becomes the posthumous son of Regulus Black, and is also a congenital magical holy body of flesh and blood. He can become stronger by fusing the flesh and blood of powerful magical creatures!

then.........

"I once saw him pick a lucky audience member on the spot to receive a brand new heart the moment he was shot in the heart!"

"I once saw him, in a moment of extreme danger, rip open Quirrell, who was possessed by Voldemort, with just a wave of his hand!"

"I once saw him blatantly rip out the dragon's heart and lungs at the Triwizard Tournament, leaving me with a mess."

"I once saw him nearly devour the centaurs to extinction in the Forbidden Forest, where a vortex of flesh and blood appeared out of nowhere and he was extremely hungry!"

"I have seen..."

In the headmaster's office of Hogwarts, Dumbledore was wrapped in a wool blanket, holding a cup of hot milk in his hand and said with a look of despair on his face.