The Outer Mystery of House Bjornaer is the mystery of the Heartbeast. The Heartbeast is the word that Bjornaer magi use to describe the animal form they can change into. Members of House Bjornaer believe that human are made up of three parts, a material body, an immaterial spirit, and an immortal soul. The spirit forms a link between the body and the soul and controls a person's animalistic passions, their instincts, and their fears. Every person has a spirit and Bjornaer magi believe the their Heartbeast is an active expression of their spirit. The secret taught to Bjornaer magi at the Ritual of Twelve Years awakens the dormant ancestral spirit and puts it on equal footing as the immortal soul, allowing both of them to affect the material body. When the soul is in control, the magus is in