Boardgamegeek https://boardgamegeek.com/boardgameexpansion/153235/descent-journeys-dark-second-edition-forgotten-sou
English - Forgotten Souls is a new cooperative adventure, allowing up to four heroes to play a fully cooperative variant of Descent: Journeys in the Dark. In a normal game of Descent, one player takes the role of overlord, commanding monsters and the forces of evil in the game.