Arkham Horror LCG: The Dream-Eaters Exp. - Rules of Play says:
The Dream-Eaters is the fifth deluxe expansion for Arkham Horror: The Card Game. In this expansion, 1–2 players take on the roles of either a group of investigators venturing into the Dreamlands or their companions who have been left in the waking world. This expansion contains the first two scenarios of The Dream-Eaters cycle; one scenario for each of these two groups. This expansion also contains new investigator and player cards that increase the customization options for the game.