Hogwarts: This wizard wants to improve too much

On the day when he received the admission letter after traveling through the world of Harry Potter, Ethan awakened the achievement system. As long as he did the corresponding events, he could get rewards.

With three million gold Galleons, he achieved the achievement [Wealthy enough to rival a country].

With the blood of magical animals, he achieved the achievement [I am no longer a human being].

Killed a hundred wizards with Avada Kedavra, and achieved the achievement [Big Melon Lover].

…

On the day of graduation, when Ethan took over as Minister of Magic seamlessly, the reporter of the Daily Prophet asked:

"Mr. Adrian, as the youngest and most outstanding Minister of Magic in history, I heard that you have become famous in Hogwarts in one year of enrollment, won the Order of Merlin in two years, and directly defeated the professor in three years... I wonder what is the reason for your brilliant achievements?"

Ethan Adrian spread his hands: "I really want to improve!"