Everyone thinks Izuku is quirkless... even himself. When All Might crushes Izuku's dreams of becoming a hero, Izuku shuts himself into his house for a year, and emerges with a newfound quirk, a lesson in confidence, and a powerful body. His quirk, Primal Instinct, lets him access his primal cat ancestors to transform into a wide range of felines - from your regular housecat to a full grown big cat. Now with a quirk, can Izuku become a hero? Can he overcome the pressure and obstacles?

On the eve of Izuku Midoriya's quirk appointment, his estranged father makes a sudden appearance, claiming to want to connect with his son. Then Izuku is declared quirkless, resulting in a tragic loss the boy could never have expected and the revelation that his father is not who he seems. A few years later, Izuku is given to a group of villains to become a subject of inhuman experiments. After so many years of pain, he can hardly believe it when he is finally rescued. But will Izuku be able to heal and move on, or will he forever be defined by the destiny the villains laid out for him? - - - *Art Not Mine*

What if izuku had a quirk... but it was just, extremely powerful, so he hid it , And what if it was called Deku ?