Ambrosea has experienced the psychic maelstrom multiple times before.  In her experience, it is a powerful psychic force which allows her to glimpse into a past, and perhaps even a future, where there are many more colors, faces, shapes and sizes than the bleak and desolate apocalypse world can offer today.  Her followers that use her drug barely scrape the surface of this psychic being, only seeing the colors and experiencing their enjoyment through that, but they do not know the truth of it.  Ambrosea knows that the psychic maelstrom, past the surface, is dangerous for the fact that it is a volatile and emotional thing.