A wellspring of primordial magics, spirits and demons, shaped by will, thought, and memory, reflecting back distorted versions of reality, separated from our own physical world by a veil of energy.

[He sounds petulant again, like a child who has had this lesson drilled again and again into his head.]

I am familiar with the concept.

As ever-changing as it might be, there are consistencies.

I am seeking landmarks.

[For lack of a better term.]