Iron golem

As the name suggests, iron golems are constructs made entirely out of iron. Iron Golems are 12 feet tall and weigh about 5000 pounds. These iron behemoths are very powerful due to their magic immunity, poisonous breath attack, and the fact that they can take a hero's head off with a swipe of their arm. These near-invulnerable guardians are often stationed as sentries and guards for wizards and powerful clerics, usually to guard treasures hoards.