Help please!!!

Does anyone know the title of this one manga/hwa/hua, the beginning was about a lot of people surrounding this one person because of a book that was prohibited or something like that. A lot of people including the MC (a dude) died even though they were innocent. The mc reincarnated into a different body but was still in the same world and everything. He reincarnated into the evil/villain side where the book originated from. He was originally weak, and had to train with thousands of other people, they would compete until there were only a number of people left. And I don’t remember the rest. Please help me out on finding the title!!!