The Troll Catapult is a beastly siege engine of Mordor made for heavy single target damage, ideal for destroying buildings. It is quite costly but produces at a quick rate. It is a powerful machine that can be used at long range effectively both against and buildings. It is also able to deal heavy damage to garrisoned units, killing them while they believe themselves safe inside the towers. They are the top notch of long range artillery and stand almost unrivaled when it comes to siege engines. Access to the Troll Catapult requires that the Great Siege Works be under the influence of Sauron.