Now that we know what kind of power Tomura Shigaraki has gained from Doctor Ujiko’s surgery, it is time to theorize what to expect. It has been revealed that Shigaraki gained the original version of All For One’s quirk while All For One himself kept a duplicate. Now that we know that All For One had a copy of his original power, the pieces are starting to fit together.
When All For One revealed his ultimate quirk combination in his final fight with All Might, I thought something was fishy. Despite the strength the combination possessed, it seemed underwhelming. The reason it seemed underwhelming is because All For One spent over a century stealing the quirks of others. If that combination was truly the ultimate combination of his strongest quirks, it should have been something much bigger and more powerful. The quirks All For One used to form his ultimate combination largely consisted of muscle manipulation, bone manipulation, and arm transformation based quirks. Based on his history, that combination seemed more limited than it should have been.
Based on these facts, it is obvious now that All For One’s quirk was limited not just because he was weakened by his first fight with All Might. It was also because the copy he gave himself was the default setting, which means he had to steal and accumulate quirks all over again. In order to make the superheroes think he was the ultimate threat, All For One needed to gather enough quirks to make himself formidable enough. Meanwhile, his original quirk was safely in Ujiko’s care until Shigaraki was ready to receive it.
Now, Tomura Shigaraki has the original version of All For One’s quirk. However, we still don’t know what to expect on how it will manifest in Shigaraki. Will Shigaraki gain all the strongest quirks All For One stole over the past century or will he have the default setting of the quirk? If Shigaraki got the default setting, that means he will have to start stealing and accumulating quirks all over again. With so many superheroes in his presence right now, Shigaraki will have a golden opportunity to start stockpiling a truckload of quirks in one fell swoop. However, if Shigaraki gains all the quirks All For One stole over the past century, he will be as strong as All For One was in his prime.
We got a glimpse of All For One’s power in his prime during his fight with Nana Shimura. During that battle, All For One’s accumulated quirks had the power to not only summon unnatural abominations to do his bidding, but it also made the sky darken and the ground shatter. The fractured streets would be set ablaze with purple fire, fragments of concrete would levitate in the air, and the atmosphere crackled with black electricity. Overall, All For One’s original quirk had the power to summon hell on earth and that same power is inside Tomura Shigaraki and about to be unleashed upon the world once again!