Li Zhirui was momentarily stunned upon hearing the words, followed by a burst of hearty laughter. It took a considerable while before he stopped and said, "Rest assured, even if an Integration Great Power were to take action personally, they wouldn't be able to take my life."
With space manipulation at his disposal, Li Zhirui naturally had full confidence; there was no need to worry about his life's safety.
Moreover, his words were an understatement. To put it bluntly, not even those of Mahayana or Tribulation Transcendence could kill him!
Because all Li Zhirui needed was a single thought, and he could escape into the space.
As for why he didn't mention the Immortal Realm, it was because he had no concept of it or knew how strong the Immortals were.
"It was me worrying over nothing." Li Chenghuo said with an embarrassed smile.
Li Zhirui waved his hand. Setting everything else aside, Li Chenghuo's concern alone deeply moved him.