(explain how you got your power, examples include infinity stones, chaos emeralds, souls of your enemies, a stronger being giving it to you so they can observe your actions, etc. Or just use a persona. And say if you work alone. Hope you enjoy your rampage!)

you are a conqueror, not of a country, not of a world, not of a universe, but of the multiverse. You travel universe to universe, taking control of them by either force or just because it doesn't have any inhabitants.

you are currently floating through the plane of the multiverse, tons of flat circles float around, each one a different universe ready to be taken. You are able to peer Into universes before entering to see which one is worth your time.

the multiverse is in the palm of your hand.