"It's not a physical realm, but it's the collective subconscious of every sentient being in the cosmos. Everything that's ever been believed in or dreamed is real there."
"Entirely seriously. It's more vast than most can fathom. Professor Xavier even carried out a galaxy-spanning romance with an alien princess, after their minds touched in the Astral."
"Everyone's mind brushes against it every second of their lives, but you can perceive it actively, and you can send your mind far deeper into it than dreams ever do."
"The sort of place one could easily get lost in. Dreams join with beliefs and become even stranger things. Unreal landscapes that couldn't possibly exist in the physical world, shaped by thought."