The Grey Wizard of Hogwarts

Is 《Harry Potter》 a fairy tale?
In front of Anton was a dark wizard who released curses at will, is mutual deception, a stinkbug, and the edge of the wizarding world like a quagmire.
In this place beyond the jurisdiction of the Ministry of Magic, even Snape's splendid reputation for murderous people resounded everywhere.
How to survive? It was the only thing he needed to think about.
Perhaps the arrival of the admission letter to Hogwarts will be sunshine piercing through the hazy clouds.
But before that, he had to rely on himself.
Only by himself!
"Crucio!" The light of the magic spell illuminated Anton's face, and he smiled so cheerfully, "Well, I'm alive again."
...
T/N: Hi everyone, this fanfic is a transition. Other websites like MTL don't have complete chapters, so I am translating raw source, using google translate or safari translate extension, also using some complete chapters from MTL, and post it here.

Warning: From what I've read so far, I DON'T think it's a Harem. This translation won't be perfect. there might be some spelling mistakes like Lu Ping or An Dong. there might also be some mentions of China, but not to the point of nationalism. Some of Voldemort's name is written as Lao fu. Some of Dumbledore's name is written as Lao Deng.

Tags: OP MC, Harry Potter, Hogwarts, Ruthless mc