The Church Grim, Kirk Grim, Kyrkogrim (Swedish) or Kirkonväki (Finnish) is a figure from English and Scandinavian folklore, said to be an attendant spirit, overseeing the welfare of its particular church. English Church Grims are said to enjoy loudly ringing the bells. They may appear as black dogs (even as other animals, such as rams, horses,roosters or ravens) or as small, misshapen, dark-skinned people.
The Swedish Kyrkogrim are said to be the spirits of animals sacrificed by early Christians at the building of a new church. In parts of Europe, including Britain and Scandinavia, it was believed that the first man buried in a new churchyard had to guard it against the Devil. To save a human soul from the duty, a completely black dog would be buried alive on the north side of the churchyard, creating a guardian spirit, the church grim, to protect the church. There you are, it's gruesome but it's there, and this is the custom conjure for one of your very own.