The Dreamlands

A transmissive plane which, similar to the Shadowfell, is heavily influenced by other planes, the Dreamlands are shaped by living thoughts. It’s named for the way in which dreams in particular shape the landscape of the Dreamlands near a sleeping mind.

Psychomancy is a conceptual school of magic which taps into and works through the Dreamlands, allowing the mage to influence people’s minds much as psionics can. Psychics can sometimes peer into or project themselves into the Dreamlands as well.