Zhou Tian did not necessarily fear those undead monsters. If Zhou Tian wholeheartedly wanted to block them in the second layer of Skeleton Cave, he was confident that those undead monsters would not be able to set foot in the first layer of the cave for several years. However, if Zhou Tian really wanted to do so, naturally, he would have to devote all his energy to this task.
Zhou Tian clearly could not always expend his energy on this unprofitable matter. Hence, after learning about those undead monsters, his plan was to seal them off and then seek revenge when his strength was sufficient. However, based on the current situation, Zhou Tian realized that his idea of sealing those undead monsters seemed difficult to implement. Judging from the performance of those undead monsters, unless Zhou Tian found another solution, his future development path would likely encounter the biggest twist.