When a player goes to bed in minecraftt they will have a chance of dreaming.
When a player goes to bed, they have a 1/3 chance of dreaming. When this happens, the players body will stay, but take a new body, and appear in a stone room. In the stone room, the player will have an assortment of randmm items. Each item corresponds a dream. If the player right-clicks on one, they will enter that dream.
In a dream, a player has the possibility of finding a succubus.