Echolocation

Allows the blind to sense stuff around them like a bat

At lvl: 1 can sense medium and large sized objects and have to set objects that you know what they are 

At lvl: 3 can now sense rough shape as well you don't auto fail checks that invole sight just have disadvantage and have 3 things that you know what they are, you also no longer have disadvantage on attack rolls

At lvl 5 you can sense all objects and their rough shape but not hidden stuff

At lvl 10 you can sense invisible creatures but not those affected by greater invisability

If you are not blind and use this feat take 4d12 psychic damage