"A true warrior pursues the enemy to the end, not just for reputation or glory. Zhou Tian knew just how hard it had been for him to gain the upper hand in this situation. If the Bone Dragon had not been preparing to use magic, or if Zhou Tian hadn't possessed such a strong spiritual power, who knows how much longer he would have had to fight against the Bone Dragon to gain the advantage?
Now, having finally managed to seriously wound the Bone Dragon, Zhou Tian wouldn't give the beast a chance to recover. And Zhou Tian was well aware that the only combat power he could rely on was his own, whilst the Bone Dragon had the backing of an organization. Thus, if Zhou Tian couldn't kill the Bone Dragon in the shortest possible time, nobody could guarantee that other members of that organization wouldn't step in to confront him.