Hogwarts: This Dark Lord is so evil

The young biologist Theo accidentally travelled to the world of Harry Potter and came to the era of Grindelwald, and his body age unexpectedly turned back to eleven years old.

"Ding! The merit system is being bound to the host. You only need to do good deeds and accumulate virtues to exchange for rewards with merit points! In addition, as long as the host finally achieves the Dark Lord's achievements, he can become a god on the spot."

Theo:? ?

A few years later...

Dumbledore: He is a great man. In this era, not many people are willing to sacrifice their own interests to help others.

Grindelwald: Nonsense! Although this guy is young, he will do anything to achieve his goals. He is obviously one of my generation!

Newt: That young man looks more brutal than a violent fire dragon, but... why is unicorn so close to him?

Tom: Who asked you to be the Dark Lord like this? Sometimes I want to call you a saint!

Theo Ever Lim: Saint? No nose, you curse too dirty!