Sometime after 10PM, the ghosts arrive to possess your home (the number of ghosts may depend on how many ghosts are available in the game i.e., how long you’ve been playing and how many dead Sims there are to spawn from.).There’s also a random buff or two that occurs when your Sim “hears” something odd in the house.It’s just a heads-up that something is going on. All Sims, including visitors, will receive a buff from being on the Possessed Grounds which just results in a “fine” emotion, so it won’t influence your Sim.Here are the features currently included in this trait mod: