bulletproof

increase your constitution by 1, to a maximum of 20

you have resistance to damage done by fire arms

you have proficiency with fire arms

if you are brought down to 0 hit points by a fire arm, you instead go to 1 hit point but lose the ability to use the limb you were shot in until you complete a long rest in which you treat it (if you were shot in a vital area, you just have a +1 to death saves)