Hogwarts, but with Rules Horror

[Dark, Twisted Harry Potter AU + Harry Potter Fanfiction + Rules Horror + Lots of Original Additions + No CP + System Golden Finger]

Standing on Platform 9¾ and staring at the bloodstained rulebook for new students in his hand, Moon fell into deep thought.

[If you see a black dog on campus, ignore it. If it approaches you and starts talking, immediately take out your wand and drive it away;

There are no Dementors at school. If you see one, it means something is wrong with your mind. Go to the counseling office for treatment immediately;

Every Monday is Confession Day. Students must arrive at the Great Hall on time. No one may skip it without permission;

...]

Moon: The good news is, I got my Hogwarts acceptance letter.

The bad news is, it's a rules-horror version!!

But what made Moon want to cry even more was that he had no option to refuse to board the Hogwarts Express!

System: Host, don't panic. You've still got me.

Moon: Great! So how can you help me?

System: By letting you experience every possible way to die at Hogwarts.

Moon: ???