To keep a secret, the mouths of the dead were naturally the tightest.
But Lei Mang was a Heavenly Martial Realm expert from the Divine Palace, and he had left behind a soul pearl within the Divine Palace.
Once he died, the soul pearl would certainly shatter.
Even if Gu Yi possessed the Blood Shadow Soul Skill and could revive him as a puppet, he could not restore a shattered soul pearl from afar.
Once the Divine Palace learned of Lei Mang's death, they would certainly send stronger experts to investigate.
What was more, Gu Yi had received considerable benefits from the Divine Palace.
The divine temple, the realm, the Venerable's teachings, countless cultivation methods and martial skills, as well as the quota to enter the Martial Emperor Secret Realm soon—all of these had been provided by the Divine Palace.
Although the Divine Palace had also intended to make use of Gu Yi.
Even gentlemen judged deeds rather than intentions.
Since the Divine Palace had not yet become enemies with Gu Yi, he accepted their goodwill and would repay some of it in the future.
Lei Mang had followed behind them to ensure the safety of Gu Yi and the others, preventing other overlord-level forces from making an attempt on their lives.
Both emotionally and logically, Gu Yi could not kill Lei Mang.
However, without a compelling reason, Lei Mang would certainly obey Bei Ming's orders and protect Gu Yi. He would never leave of his own accord.
And for the sake of his secrets, Gu Yi could only use another method to control Lei Mang and turn him into one of his own.
Having made up his mind, Gu Yi looked at Yinsha Elder and Lei Mang, who were fiercely battling in the sky, and decisively made his move.