All For One's ultimate goal is to steal his younger brother's Quirk, One For All, the only Quirk that can oppose him. He is the mentor of Tomura Shigaraki, having spent the young villain's life shaping him into a successor and a vessel for his power in a plan to eventually conquer the world as a self-proclaimed "demon lord". He has 21 to 28 quirks, making him the most powerful individual in the hero world.