Huorn

Huorns are passive (until angered) mobs that spawn in Fangorn Forest. They appear as regular oak, birch, or beech trees until attacked or disturbed, then angry faces appear on them and they come to life. They are as fast as a sprinting player, and are not hurt very much by swords. Axes are the most effective method of killing huorns. Upon death, a huorn will drop logs of their tree type or sticks.

Dark Huorns
Dark Huorns spawn in the Old Forest and are hostile to all players. They will attack you if you try to cut down a tree in the Old Forest, regardless of one's alignment. They may also attack if you get too close to them. Fire and axes are the best way to defend yourself, as axes will do much higher damage than swords to this enemy. Killing a Dark Huorn will give you the achievement "Forester's Nightmare". Both the Dark Huron and the regular Huorns have 60 heath.