Beware the Wolf

What’s this? Oh, nothing, just a quote I found while skimming The Astral Plane, its Scenery, Inhabitants, and Phenomena

“…there are certain circumstances under which the body may be seized upon by other astral entities and materialized, not into the human form, but into that of some wild animal—usually the wolf; and in that condition it will range the surrounding country killing other animals, and even human beings, thus satisfying not only its own craving for blood, but that of the fiends who drive it on.”

In other words you have a werewolf or skin-walker, who sits in their house meditating while using animals to terrorize the nearby population. When the Astral Plane invades, werewolves will be their fifth-column.