After achieving peace rimuru was stuck doing papaper work for last few centuries was stuck with boredom . Ciel seeing her master's state suggests going back in time to the era when Veldanava created the cardinal world. in this fanfic i only upload the edited chapters so if anyone is interested in more chapters please go to my webnovel page and read the other fanfic that is writtten under the novel catagory. (I don't own tensura)( I adjusted the story to my liking)( the book cover is not mine. i just googled it. if you are the owner please tell me if have any problems)