[Unlimited streaming + afterlife + at least live to an incredible age + self-made system + dead river + break through the air wall to pick up artifacts]
A highly difficult world after death.
Write a book to simulate it and try to live to an incredible age.
As for the high difficulty, it is to prevent cheating. In the world after death, there will only be people like me and those who have read my books.
It's a bit baffling.