Who willingly provokes lunatics?
Despite Zhou Tian's utter reluctance to fight Pan Shi, after killing the Tyrannosaurus, Pan Shi recklessly charged at him.
Even if he didn't wish to fight Pan Shi, upon seeing Pan Shi rushing towards him, Zhou Tian still had no choice but to confront him then. Given their relationship, Zhou Tian could imagine that if he did nothing, Pan Shi would surely kill him due to his temperament.
How could his enemy possibly go easy on him?
Thus, according to their relationship, Pan Shi's appearance before him inevitably meant they had to determine a winner. Considering the situation at that moment, honestly, Zhou Tian wasn't really afraid of battling Pan Shi.
In this world, Zhou Tian's strength had weakened, and it would be unlikely to suppress Pan Shi with his abilities from the Main Plane like in the Outside World. However, even though Zhou Tian's power was reduced, it didn't mean he was powerless against Pan Shi.