When the story of My Hero Academia introduces the megalomaniacal All For One, its immediately revealed that his Quirk of the same name is a frightening ability to behold. Unlike other powers, All For One can bestow Quirks and steal them from others. Such was All For Ones raw power that the villain is seen using the Quirk to simultaneously use stolen Quirks to unleash powerful attacks - an ability enough to force All Might into retirement.