Holy Terror (2002)

Possessed by a demon in life and forced to spend eternity doing the devils bidding in death, a malevolent nun returns to life to torment a young couple and their terrified friends in director Massimiliano Cerchis sacrilegious shocker. A young couple has just moved into their new rental home, and in order to properly break the place in they have invited over a small group of friends for an intimate housewarming party. Soon prompted to experiment with an Ouija board by their sinister landlord, the unassuming partiers inadvertently unleash the murderous spirit of a demonic nun whose evil is so powerful that it cannot be contained to the spiritual realm.
—Anonymous