A Black Huorn
Evil Huorns (S. Gûllyrn) were in the charge of the Ents for the most part, although some of them, particularly the evil "black-hearted" ones, went away from Fangorn Forest and the protection and direction of the Ents. Many of these wayward Huorns settled in Mirkwood, where they maliciously preyed upon living beings out of some perverse need, for Huorns did not eat, any more than Ents did. Huorns came in as many different forms as trees did.