The Dark Lord's Employment Guide At Hogwarts

The young biologist Li Weid accidentally traveled to the world of Harry Potter and came to the era of Grindelwald, and his physical age turned back to eleven years old.
"Ding! The merit system is being bound to the host. As long as you do good deeds and accumulate merit, you can redeem rewards with merit points! In addition, as long as the host finally achieves the achievement of the Dark Lord, he can become a god immediately."
Li Weide:? ?
A few years later...
Dumbledore: He is a great man. In this era, not many people are willing to sacrifice their own interests in order to help others.
Grindelwald: Nonsense! Although this guy is young, he will do whatever it takes to achieve his goal. He is obviously a member of my generation!
Newt: That young man looks more ferocious than a violent fire dragon, but... why is Qilin so close to him?
Tom: Who made you become the Dark Lord? Sometimes I want to call you a saint!
Li Weide: Saint? No nose, you scolded me too filthy!