♂,
Killing the direct descendant of a Mahayana cultivator from the Nightmare Moon Realm—and one whom he valued extremely highly—would leave behind consequences far beyond what Yun Yao and Fairy Lu Xiang could bear.
If there were any restriction inside the female cultivator's body, even if it was not a powerful offensive technique but merely an image capable of displaying the scene, they would definitely never have peace afterward.
By then, let alone searching for materials and completing their contract mission, even whether they could leave the Nightmare Moon Realm alive would no longer be up to them.
Moreover, Yun Yao had already realized that although the young woman before him appeared to be quite young and was only at the early Spirit Severing stage, her methods and strength were no weaker than his.
Neither of them knew whether her Old Ancestor had left her a powerful attack comparable to one from a Profound Tier or Mahayana cultivator. However, as a Mahayana cultivator, it would naturally be extremely easy for him to seal such a protective measure inside a junior cultivator's body.
If the female cultivator truly unleashed a powerful attack comparable to a Profound Spirit, Yun Yao was certain he would be unable to withstand it.
Rather than that, stopping the fight with her would be the wisest choice.
"Fairy Lu Xiang, the one who drove away those four Kui family cultivators was Fairy Shuyu. In that regard, this Qin and Fairy Shuyu have also resolved the crisis facing you two fellow Daoists. For such a favor, the two of you should naturally show some appreciation. Let that Azure Nether Azure Python's crystal core serve as your thanks. If you feel that crystal core is too precious, this Qin can compensate you in some other way. I wonder what