Immutable Reform

Your race has a unique physiology that's far more nebulous than any other. You gain the following benefits:

• Increase your Constitution score by 1, to a maximum of 20.
• If you are missing a part of your body but you are sill alive and conscious you can use an action to regenerate your missing body parts. Roll one Hit Die,  your hit point maximum is reduced by the number you rolled. After your hit point maximum is reduced all of your body parts are restored to you and you heal a number of points equal to what you rolled + your constitution modifier (minimum of 1). You also gain one level of exhaustion. After 10 days or 5 days of doing nothing but rest and light activity you regain your maximum hit points.