Demon-Proof Room Ritual

This ritual prevents demons and malevolent spirits from entering a location.

Procedure

 * 1) Place a seashell in each corner of the room
 * 2) Draw a circle of pink chalk close to the centre of the room
 * 3) Chant "Praesidio" before destroying each of the seashells
 * 4) Wash away the chalk circle with holy water