Having managed to injure that NPC demigod once, Zhou Tian was confident he could do so a second and third time, provided there were no accidents. Given the current comparison of strength between them, although Zhou Tian was still at a disadvantage, if he focused solely on attacking that NPC demigod, the demigod would definitely not be able to escape his strikes.
Zhou Tian was aware of his advantages and disadvantages, and similarly, those NPC demigods were also aware of the threat that Zhou Tian and his subordinate Centaurs posed to them. It wasn't just the NPC demigod who had already suffered several attacks from Zhou Tian, but even the other NPC demigods were somewhat affected by that time.
After all, those NPC demigods cared quite a bit about their own safety, and if it wasn't necessary, none would seek out their own demise. Clearly, even if Zhou Tian was not their match, if he was determined to drag someone with him to Hell, he definitely had the ability to do so.