User blog comment:Trident81/The Most Powerful Quirk/@comment-36544819-20181004142846

All for One is the strongest quirk in the Bnha or so called Mha universe now. His quirk is just stealing ppl qurik and hve it his own. How easy was that? He can even give ppl quirks but some ppl could not surpress its impact and become a living doll for him to controlled. Its something way too more to be called unfair for the heroes to fight against him. About One for All is that Deku uses and broke his leg and arm when it reached 100% because its after so many generations the storage for its power has become to strong that until it was Deku turn as the 9th succesor he could not handle the impact that One for All has overleaked as we see green lighthings coming out from his body so does when All Might fight All for One we could see yellow lighthing coming from his right arm. It means he is gonna use over for a bit and thats why.