u/Many-Apartment5155

A friend and I were talking about the Faunus and went on to talk about how we were both unhappy with the fact that they only have one animal trait. We came to the realization, looking at different Faunus, that it is truly a genetic lottery, and there would be a decent possibility for someone to be born with a trait that is completely debilitating. This could range from minor things to having horse hoves for hands to something pure nightmare fuel, where one's skin could be replaced with that of a jellyfish or be born with hollow bones. What is the absolutely worst trait someone could be born with?