Werewolves

Morgoth originally produced Werewolves by magically altering his minion's forms so that they became huge, enchanted Wolves. He created others by placing his minion's spirits in the bodies of great Wargs.

These creatures can alter their form so that they can stand upright and use their clawlike hands, but they cannot transform themselves into Men. While Werewolves possess the intelligence of the Secondborn — and though they can speak, use tools, and cast spells — they remain Wolf-like in their nature.