Zhou Tian couldn't help but feel a hint of regret at the death of the Hellfire. Despite it being his enemy, there was no denying that Hellfire's contributions were indisputable and irreplaceable, allowing Zhou Tian to easily take down the undead this time.
If possible, Zhou Tian would even be willing to help Hellfire. However, he knew its temper well, hence he simply watched as it was beaten to death.
It wasn't that Zhou Tian was indifferent to its fate, he understood that if he approached recklessly, he might become Hellfire's next target. If he had to face Hellfire's attacks, how should he respond? A counterattack would kill Hellfire instantly, and not counterattacking would mean bearing Hellfire's attack while dealing with the Saint-level Undead.