On the surface, it is about fighting against the five scum, but in fact, millions of troops inside and outside the body are on standby at any time, and the enemy dies in an unknown way (for example: a strong man attacks, the protagonist makes a look, the probiotics in his body switch sides, E. Coli riots, and he instantly suffers from diarrhea and dehydration and loses his combat effectiveness).
Poisoned? Command immune cells to work collectively + specific bacteria to decompose toxins. Seriously injured? Command stem cells to differentiate and regenerate wildly. Trap? Order corrosive microorganisms to chew through everything.