Knives, axes, Ouija boards, dolls, and masks are common props used in horror films to symbolize violence, death, and invoke fear in viewers. Knives represent anger and torture, while axes imply the antagonist views victims as objects to assert dominance over. Ouija boards are used to contact spirits but often allow evil entities to possess victims. Dolls and toys are intended to be comforting but become terrifying when animated. Masks hide the identity of antagonists, encouraging mystery and leaving audiences feeling powerless against the unknown threat.