As the form of the mask develops, it is usually believed to acquire power increasingly in its own right, and again various procedures are prescribed to protect the craftsman and to ensure the potency of the object. If all the conventions have been adhered to, the completed mask, when worn or displayed, is regarded as an object suffused with great supernatural or spirit power. In some cultures it is believed that because of the close association between the mask maker and the spirit of the mask, the artist absorbs some of its magic power. A few West African peoples believe, in fact, that the creators of masks are potentially capable of using the object’s supernatural powers to cause harm to others.