The Iron Hills Catapult fires 3 smaller missiles which are extremely good at taking out units but lack some power when it comes to buildings. Due to the quality of their craftsmanship, Dwarven catapults are sturdier than the catapults of other races such as the trebuchet or the onager.
The Iron Hills Catapult can be given the following upgrades:
The Iron Hills catapult is perhaps the most powerful catapult in the game when used against units as it can quickly turn an army to dust. Its power is reduced against buildings, however; area of effect won't matter and each individual shot deals less damage than the single shot of a regular catapult.