Even with the loss of human lives acting as a barrier to Zhou Tian's infiltration, and having made such a decision, the Skeleton Tribe continued to lose many of its members due to their firm resolution. Despite the strength of Zhou Tian's Beastmen now surpassing theirs, they still were unable to penetrate deeper.
Once the battle reached that point, then came the war of attrition. Regardless, given the current situation, Zhou Tian didn't have any concerns. If the battle continued like this, then the powerful Beastman Clan, who held the advantage, could naturally defeat their opponents. Even though this operation required more effort than Zhou Tian originally anticipated, if they could bring down the Skeleton Tribe, their initial goal would have been achieved.