"Slaying them can yield Spirit Nourishment?" Li Yuan froze for a moment, suspecting he had misread it.
Without hesitation, Li Yuan used Divine Palace Investigation again. The result was still the same.
Alien Race! Those two words instantly surfaced in Li Yuan's mind.
Li Yuan had considered this before. Only by killing Alien Races could one obtain Spirit Nourishment.
Then, could he use Divine Palace Investigation to identify Alien Races lurking within Human Civilization?
He had only ever heard of alien spies.
Ever since his mental power broke through Level 20, greatly reducing the burden of using Divine Palace Investigation, he had developed the habit of casting it whenever he met important people.
Unfortunately, after all this time, he had never encountered a single alien spy.
After his mental power broke through level 30, using Divine Palace Investigation several hundred times a day had little effect on him, so the habit became even more ingrained.
Who would have thought—
He had only just returned from the Mingxu Star Realm and had not even fully left the War Base before he encountered one!
Yet, looking at the man who had jumped down from the aircraft, his clothes, appearance, and everything else were no different from the people around him.
Is he really an alien spy? A trace of doubt flashed through Li Yuan's heart. Nothing about his appearance gave him away.
Most crucially, Divine Palace Investigation had always followed the rule that "only killing Alien Races yields Spirit Nourishment"... but that still was not absolute confirmation.
"What is it?" Li Yang, walking ahead, noticed Li Yuan's abnormality.
"Junior Brother, who are you looking at?" Shi Xiao noticed it as well.
"Nothing." Li Yuan lightly shook his head and looked into the distance. "I just think the spiritual aura of that man