Fast Fist is the Quirk used by Blackbelt.
Description#
The user of Fast Fist can move at least their hands extremely quickly, allowing them to hit up to 100 times in less than a second.
Using the Quirk, Blackbelt is able to repeatedly hit near someone's pressure point, eventually hitting it and instantly knocking them unconscious; due to the speed of Fast Fist, it moves fast enough that to the naked eye, it seems like a single chop motion.
Weaknesses#
While the exact control and range of Fast Fist is unclear, it appears to be limited to the hands and arms, as Blackbelt rushed to a crime scene at a normal running pace.[1]