Doom Crossbow

A Doom Crossbow was a massive and powerful crossbow, a middle step between the common oyumi and the ballista siege weapon. A little over three feet in length, it had a sturdy ironwood stock and long bow limbs made of steel. A doom crossbow fired long ironwood bolts about as thick as an average Rokugani's thumb, which were typically tipped with a barbed, armor-piercing head. Thanks to the size and the strength of the steel limbs, it required a special detachable, hand-cranked windlass to cock it. The weapon's power allowed its deadly bolts to punch through metal plates, armor, and the thick, scaly hides of oni with ease.

Drawbacks
A doom crossbow was quite heavy and required uncommon strength to use. It was also quite hard to aim at nearby targets. However, when its user was fighting on the Kaiu Wall, these issues could be lessened by securing the crossbow into a stand, and become fair trade-offs for a weapon that could potentially drop a raging ogre with one shot.