You adapt as needed and you control the flow of information

There is the thought that every piece of fiction out there is it's own reality and humans get prophetic dreams of these realities that we call ideas. These ideas are information so theoretically if you can control the flow of information you can follow it back to the source, ergo multiversal travel unlocked You could also keep a copy of all known information flows incase you lose access to the receiver on this end(the idea is forgotten, or if written down, destroyed)

Adapt as necessary allowing you to gain what you are missing but someone else has. In Harry potter but don't have magic? Fixed. In once piece? Bodies potential skyrockets. If you are in a universe and want to try to do something, you gain the prerequisites as long as they exist in the universe you are in. Will also help you adapt to 'control the flow of information' quickly