Bring it on
The cultivators labored, winding the ballistas that were mounted across the walls. There were six in total of these fearsome beasts along the southern wall of the city. A bolt was mounted in their nooks, the cultivators wasted no time. There was the rumbling sound of a marching army that drummed and shook the ground but with the Ivory Sword Saint's steady command, they were not deterred and did not fall into trembling panic.
There were two types of ammo that fit into their nooks. The first type was a flimsy bolt made of soft wood. Though this kind of weapon might deal a fatal blow to a normal person, against demons and cultivators it was not that terrifying of an opposition. However, within the grains of wood there were symbols etched.
As the ballistas were wound and loaded they glowed with light, drawing spiritual energy from the air. To further the process along, a cultivator actively fed their spiritual energy into the bolt nestled in the body of the ballista.