Even though Hero Killer Stain is behind bars now, My Hero Academia is about to end up in another catch 22 situation. It seems like All Might’s and his mentor Gran Torino’s old nemesis, All For One, is about to make a move soon through his successor Tomura Shigaraki and the League of Villains. Besides that, All Might finally discloses about how he got ahold of the ultimate power, One For All.
Boku No Hero Season 2, Episode 19 showed that the students at U.A. High have started their classes once again after their internships were over. While each student has his/her own internship experience story to tell, they are all eager to hear from Izuku Midoriya, Tenya Iida, and Shoto Todoroki about their latest encounter with Stain the Hero Killer himself. Furthermore, Episode 19 also shows a new type of training known as rescue training exercise. All Might later tells Midoriya to meet him after the training is over.
Warning: Spoiler Alert! If you do not want to know My Hero Academia Season 2, Episode 20 spoilers, then stop right here.
The Secret of the Ultimate Quirk, One For All
Once the training is over, Midoriya reaches out at All Might’s office as instructed. Plus, this is where he gets to know about All Might’s past and how he got ahold of the ultimate quirk called One For All. In My Hero Academia Season 2, Episode 20-21 spoilers, All Might starts out by explaining his (Midoriya’s) experience with Stain.
My Hero Academia Season 2’s previous episodes that featured Midoriya’s, Iida’s, and Shoto’s fight with Stain showed what the hero killer’s quirk could do. Apparently, Stain had the power to take away the freedom to use a quirk of his opponent by tasting the rival’s blood. He was able to lick Midoriya’s blood. This incident may have caused many viewers to think that All Might’s quirk One For All, which is transferable through an exchange of DNA, may have been transferred to Stain as well.