That time I was reincarnated as a primordial

This is a fan fic about a guy reincarnating into the world of that time I got reincarnated as a slime as both a primordial demon and dragon making him a hybrid of both and unique in this story he will take all the waifus im also thinking about adding the testament of sister new devil, high school Dxd, and akame ga kill as the 3 worlds in the multiverse he will be visiting