My Hero Academia: All For One's Greatest Feat Is Now His Big Weakness

screenrant.com:

Warning: contains spoilers for My Hero Academia's 356th chapter

All for One's arsenal of quirks is one of the key reasons why he's such a dangerous villain, but that power and his desire to hold on to it may be what finally brings down My Hero Academia's big bad.

All for One takes his villain name from his original quirk, which enabled him to transfer quirks from one person to another, as well as implanting quirks in those without and removing them entirely. He used this ability to build his own power in society, and upon meeting Dr. Garaki, became able to not just take quirks, but clone them as well. In this way, All for One could keep a good ability and return it to its original owner, as he did with Garaki's slow-aging quirk, radically increasing his ability to steal and stockpile power. He's used these powers to give to those working under him like Lady Nagant, to create Nomu, and for his own use. However, after the All for One quirk itself was transferred to Tomura Shigaraki, it would seem that All for One's abilities should begin weakening, in just the same way that All Might's did. All for One knew this too, though, and took steps to prevent it, by giving himself a cloned version of the All for One quirk.

Related: My Hero Academia: Endeavor Confirms Deku Has Already Surpassed All Might

Now, Chapter 356 reveals this fact in the context of his fight against Endeavor, Hawks, Tokoyami, and Jiro. The cloned All for One quirk just can't match the original, apparently, as All for One struggles to control the quirks within him. Each quirk is equipped with a tiny piece of the original owner's soul--including former pro heroes like Ragdoll, and they're able to resist enough to slow All for One down and create openings for