A brutal, massive killing happened right away.
Once those short and scrawny non-humankind slaves rushed up to the fence wall, flagstones, that were condensed by a special kind of magic smashed directly down from the wall. These flagstones were all ten-zhang long, two-zhang wide and three-inch thick, falling straight down from the top of the fence wall, which was hundred-zhang tall; just like a giant clapping a giant-sized brick severely on a group of ants.
When those black flagstone were falling down, thousands of spell symbols sparkled on the surfaces of those flagstones, making these flagstones heavier, more solid, falling down faster and surely, more lethal and destructive.
Tens of non-humankind slaves, who were rushing in the front, were struck by those flagstones. Along with ear-piercing bong-cracking noises, those flagstones smashed flat on the ground.