What does "nano" even mean as a concept?
0.000001 millimeters. Unless your eyes have mutated or you have some kind of special Genetic Ability, you basically can't see an individual nano-level unit at all.
Back when Li Zheng was in the Matrix, he'd gotten medical Nanorobots—one small vial of Nanorobots looked like less than a handful of sand, but in reality there were tens of millions of them!
You can imagine how hard it is to deal with this Element race.
"To beat them, unless I have some high-power area attack that directly crushes the entire space they're in." Li Zheng's thoughts spun fast. "Or else… I have to find a way to hit that nano-level core. Since Old Pu detected that the core inside them is nano-level, that means he can give me a prompt."
[That core is in constant motion, moving very fast. It cannot be locked onto in real time.]
