The Master Of All

This is your typical story with a random guy being reincarnated into the Multiverse. However this time there is a slight difference. " Master of the Hueco Mundo" " Master of the Fire Country" " Master of the Saiyan Race" " Master of the Villain Association" Our MC will have a chance to become all of this, with the help of a rather simple book. Here is a story about a man who can become the Master of anything.