Ballista launch steel-tipped bolts to impale all in their path. As they require an awesome amount of force to be placed upon their tremendous bowstrings, these machines of war are reinforced with lumber from the precious Ironwood trees. The Ballista, a product of Human design and Elven craftsmanship, is a symbol of the unity between all those who have allied themselves against the Horde. The Dwarves prove to be another valuable ally, in that they may be employed to design improved missiles which make the Ballista the most devastating weapon of the Alliance.