Werewolves

Werewolf sketch from The Lord of the Rings: The White Council game

Werewolves were servants of Morgoth, bred from wolves and inhabited by dreadful spirits (fallen lesser Maiar or fëar of Orcs).

They were thought of by Sauron, who was their master, and took the shape of a great wolf himself at least once. The Middle-earth werewolves were not shapeshifters like the Werewolves of European mythology