Zhou Tian's primary purpose in arriving in that world was undoubtedly to kill the Human Emperor. Firstly, it was for the purpose of deterring enemies from the outside world, letting those enemies in the Main Plane know his power, thus ensuring the peace of the Main Plane without easily disrupting the current balance. Meanwhile, upon entering this world, the Human Emperor had already become a threat to Zhou Tian. If Zhou Tian could not eliminate him, then the Human Emperor would inevitably become a future threat to him.
Now that the Human Emperor had been dealt with using Zhou Tian's method, Zhou Tian could start on the second objective of his entry into this world.
