Wood Golems are mutated living trees that punch at you. If hit enough times, parts of them get chopped off but won't stop them from attacking. Sometimes Evil Wizards will summon them to fight on their behalf.
The Wizard has the ability to form Wood Golems out of breakable wooden objects such as crates, barrels, and log barricades. He has the uniuqe ability to add more wood, strengning his wood golem.