Someone, Please give Deku a Break (cross posted on AO3)

Deku is quirkless but also kind of really not. His quirk has death activation, and when re wakes up after dying, his quirk remolds itself to relate to how he died. He keeps each quirk as he dies. The more he dies, the more powerful he is. The more painful the death, the more emotionless he becomes. Quirk exhaustion comes in the form of emotional loss. Only natural reactions and natural responses will remain after 300 deaths. That number came a lot sooner than it should have.

Or alternatively:

Izu loves his dad, his dad would burn the world for him, All Might is absolutely screwed, karma's a bitch and Izuku's quirk might actually take over the world unintentionally.

Note: Image art is not mine, I just snatched it until I can create my own.