Snow White Hills Blood Bowl Chronicles

They are foul creatures, crafted by sorcerous rituals at forlorn spots deep in the trackless swamps of Albion, where a previous wayfarer has lost his life. Their forms are typically made up of swamp mud and the detritus of bogs. Their cries are strange and mournful. A spell caster of sorts often accompanies a Fenbeast, but not always. The spirit that inhabits them continually seeks revenge against the living and so they kill, unabated, unless their dark master bids them otherwise. A Priest of Morr can lay one to rest, but it is no easy feat.: — Metrious Null from On the Misty Isle