Golem Flesh

Your construction includes advanced alchemical and magical properties that allow you to form a fleshy layer around your body, enabling you to take on the appearance of another race.  You decide what you look like while this layer is manifested, including race, gender, facial features, hair length, coloration, and distinguishing characteristics, if any, though none of your statistics change. It's likely that your actual body is also skeletal in appearance to better accommodate your flesh. You gain the following benefits:

• Increase your Constitution score by 1, to a maximum of 20.
• When you finish a short or long rest, you can choose to form a layer of artificial flesh around yourself, and you gain temporary hit points equal to your level + your Constitution modifier. The flesh behaves as if it were real. Any loss of temporary hit points are reflected in wounds to the flesh, and the flesh is destroyed when you lose all temporary hit points until you can regenerate it during another rest.
• When you finish a long rest, you may make minor changes to your flesh's appearance, such as hair length or color. Major aspects such as race, gender, and facial features are permanent, however.