Fantasy Invasion: the Book of Killings Comes with Me

"Others awaken their talents, I awaken my calculator." "Are you the demon king who has descended? What a coincidence, I am gaining experience." "This sword was left behind by my grandfather, and this book was a job gift from God - but my attributes were created by my swordsmanship." "The eight-sided Han sword has eight sides of majesty. The murder book is full of gods."