The elder monk's strength, able to suppress the Curse Ghost, was evidently many times greater than that of the Green Blood Ghost.
If he were to confront it directly, the elder monk's strength might be adequate to vanquish the Green Blood Ghost with just one True Word Incantation, entirely obliterating its existence.
Regrettably, the Curse Ghost, who held the Soul-hooking rope, also restrained the Elder Monk, leaving him without the strength to deal with the Green Blood Ghost attacking him from his back.
Although the Elder Monk seemed to cultivate some strange art, each time the Green Blood Ghost attacked, he was able to heal swiftly.
However, Xiao Mu could see that the Green Blood Ghost could indeed inflict damage on the Elder Monk. With each Green Blood Ghost's attack, the Elder Monk's presence faded slightly as he healed himself.