It would be a cool shaman type experiment to try and see if you can contact some sort of higher beings in a lucid dream.
The words " I summon the most powerfull good being in the universe into my body" should suffice. The Idea is that it is powerfull enough to pick up your transmission and also enough to interact with you in your mind.
I don't recommend trying to meet the most powerfull bad being.
Im interested in hearing what you get in this dream.