This document outlines the key elements of a possession horror film that a group of students plan to create for an assignment. It discusses conventions of the subgenre like priests helping the possessed and isolation of characters. The students' film will focus on brothers who use a Ouija board to contact their deceased mother's spirit but instead summon something sinister that possesses one of the brothers. Inspiration will come from classic possession films like The Exorcist that established conventions as well as Ouija and The Devil Inside for challenging conventions.