What are some weak or seemingly useless abilities that can become extremely lethal and dangerous if used in a genius way?
The ability that Mirio has in my hero academia.
Forgot what its called
This could be useful for anyone who wants to control others' actions and reactions. It also works like a charm around the ladies. Seriously, though, you could make someone overdose on their own cortisol. It's pretty badass.
What do you think?