No Prep Module: Curse of the Dream Realm (Patreon)

https://www.kassoon.com/dnd/adventure/no-prep-curse-of-the-dream-realm/

Plagued by unsettling dreams, the PCs discover their connection to a sorcerer's sinister experiments, and must confront their tormentor in a surreal dreamscape filled with perilous nightmares before he destroys their minds.

https://www.kassoon.com/dnd/adventure/no-prep-curse-of-the-dream-realm/