The Skeleton Tribe was caught off guard because they had not anticipated that Zhou Tian would dare to launch an attack on them. This allowed Zhou Tian to easily block their entrance.
By the time Zhou Tian had successfully blockaded the exit, the Skeleton Tribe, though unsure of the specifics, knew there were enemies at the door due to the numerous skeleton deaths. Given the situation, the Skeleton Tribe naturally sent more of their clan members out to fight.
Once the skeletons realized there were so many Beastmen blocking the way, they reacted instantly, despite not anticipating this initially.
No matter what, the Skeleton Tribe was determined not to let Zhou Tian block their cave entrance. As such, when more skeletons arrived at the entrance, without any hesitation, they attacked right away.
