The Primordial Dream is the region of the Astral Realms which corresponds to the astral representation of the nightmares and terrors of humanity.
It is located on the outskirts of Temenos, the realm of the collective consciousness of humanity, almost like a boundary between it and the Anima Mundi, the soul of the world.
It sees its origins at the dawn of humanity, even before the invention of language.
Some humans are still able to dream deeply, so much so that they can learn the wisdom presented by the Primordial Dream.
This is what happened to me, I am trapped in this world.