User blog:Lover of the Muse/Izuku's One for All development

This is the progress that Izuku has made so far towards gaining full mastery of One for All. Izuku has come a long way from not being able to use his quirk without injuring himself. But he still has a long way to go. He's only about halfway through his first year at UA High after all.
 * 1) unleash 100% in one place (Quirk apprehenson test; Chapter 6). During this stage he would break an arm or at least a finger with every attack that used One for All.
 * 2) control a percentage in one place (Universal Simulation Joint). Izuku tries to hold back so that he doesn't damage his body.
 * 3) control a percentage throughout the body and put into regular use (Vs. Hero killer; Chapter 48). Izuku chose 5% as his limit. This technique gave him greater manueviribility and increased speed and strength.
 * 4) Shoot Style (Hero Lisence Exam; Chapter 101). Developed a fighting style that focused more on kicking.
 * 5) upper limit moves from 5% to 8% (Hero Lisence Exam; Chapter 119)
 * 6) and now when push comes to shove be able to bring out 20% for a short period (Internship Arc; Chapter 154). Izuku can't move at 20% for long, while it doesn't break his body it does hurt him and makes him feel like he's starting to break.
 * 7) combine 2 and 6, bring out 20% in one part of the body (Cultural Festival; Chapter 172).
 * 8) *This allows him to utilize ranged wind pressure attacks similar to what he could do when he was using 100% in a single part of his body. These attacks are less powerful but more focused and cruciailly don't damage or hurt Izuku' body. They can also be fired off consecutively.
 * 9) Izuku Midoriya begins communing with past holders of "One for All" apparently the amount of their memories he can access is tied to how much of One for All he can use. (Pro Hero: Chapter 193)