Just as the Monsters had thought, under normal circumstances, Zhou Tian wouldn't need to pay them any mind. With his strength, if those Monsters dared to show themselves before him, then all Zhou Tian would need to do is launch a few casual attacks to kill them.
However, once those Monsters began engaging in guerrilla warfare with him, cleaning them up became much more troublesome for Zhou Tian.
Zhou Tian's strength at that moment was indeed much stronger compared to those Emperor-level bosses. Almost certainly, if Zhou Tian marked those Monsters, a few casual attacks would suffice to finish them off. Yet, if those Monsters didn't appear openly, then no matter how strong Zhou Tian was, he couldn't just bomb their entire Territory in one go!
Thus, the problem arose at that time.
If Zhou Tian couldn't bomb the Monsters' entire Territory, then those Monsters hostile to Zhou Tian could naturally find a safe place to hide at that time.