Mongol General's Shortbows

Origin
In 1234, the Mongol army, led by Ogedei Khan, son of Ghengis Khan, launched an attack on the Jin Dynasty in Southern China. Three armies were deployed by the Mongols, each led by a different general. Kochu and Koten Khan, the sons of Ogedei, and the Tangut general Chagan each led their army into war. There, the Mongols defeated the Jin and took control of Southern China. These shortbows, a staple weapon of the Mongol armies, were no doubt used by the generals during the fight.

Effects
Though each bow can be used seperately, the maximum effect comes from using all three together. Firing an arrow of any kind from the bows will weaken and possibly destroy any and all forms of physical barriers, from the walls of a palace to solid reinforced iron. The more bows used at one time, the more powerful the effect of the destruction.