i am writing a fanfiction with anime world's and our mc will travel to different world's and explore it become the strongest in the said world .
World's:- Tensura
Marvel
Naruto
Dragon Ball
?????
Mc will be op but have to seal power to enter different world's and have to start from scratch in the said world with little advantage he can unseal the power but the world or the living creatures In world would have to suffer