Caythilus is a quiet god of the wild places, whose power is much reduced in the world. The devastation of the Chaos Wars which blighted much of the landscape of Blackfire has twisted many areas so far from their original nature that he no longer possesses any influence over them. The civilized peoples of the Empire consider his worship to be quaint and old-fashioned, and turn their backs on him to give praise to the Chaos Gods or those who oppose them, instead.

Caythilus himself cares little for the affairs of mankind as a whole, for there are many who have sought to exploit his power for their own ends. He concerns himself with the nurturing of what pristine wilderness remains, and looking after his chosen people. His followers are usually simple people, or students of the natural world. He is as likely to manifest as a sad old man or a virile stag.