Mountain-troll

Mountain-trolls are closely related to cave-trolls and hill-trolls and are minions of Sauron in J. R. R. Tolkien's The Lord of the Rings. They are usually found in the Mountains of Shadow and the Mountains of Ash, the two mountain ranges bordering Mordor. It's been suggested that they are the biggest and strongest of all trolls. They were said to wield the great battering ram Grond in shattering the gates of Minis Tirith.