[Focusing all power of the A.I. Chip Module on task:
-Using the date obtained to analyze the core essence and principles of the Dark Fog
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Cain didn't venture into the Dark Fog merely to fight against the Humanoids of Dark Sky. Although he wanted to test the limits of his body and the power of his Collapsing Space-Time Eye, it wasn't the time to recklessly incur injuries.
The reason he ventured deep into the Dark Fog was to analyze its essence, power, and principles. Fighting at the border and stemming the march of the Insect Army would only slow the growth of the Dark Fog but wouldn't stop it, nor would it bring them closer to victory against Dark Sky.