The valley wall of this human demon valley was extremely large. According to the demoness' description, it was as if a hole had been opened in the ground on the scale of the planet.
Therefore, there were many human demon commanders. Before the demoness advanced to the general level, she usually interacted with a few human demon commanders, such as fighting for territory and food.
After finding these human demon commanders, although the demoness couldn't bear it and wasn't willing to attack her own kind, Lin Yan wouldn't indulge her on this point. He directly ordered her to beat the human demon commanders until they were half-crippled before dragging them away and turning them into servants.
As for the other human demons under the human demon commander, Lin Yan didn't force the demoness to kill them. Instead, he ordered the human demon commander, who had transformed into a servant, to kill them together and take the Spirit Marrow.