I'm going to be playing a changeling (from UA: Eberron) soon, and my DM is excited to have this unique race as a PC, but I was wondering if there was some form of RAW on this sort of thing.
The Changeling race's Shapechanger trait simply states:
Shapechanger. As an action, you can polymorph into any humanoid of your size that you have seen, or back into your true form. However, your equipment does not change with you. If you die, you revert to your natural appearance.
There is no age section in the Changeling race stats, and I am just curious as to what its lifespan and maturity rate would be. I thought that it could potentially be based on the species it is polymorphed into.
Let's say that this changeling has been in human form for 50 years. Has this form aged accordingly, or does it appear to remain the age at which you first polymorphed into it? Also, let's say that the form you've chosen has reached an elderly state; could said changeling simply polymorph into a much younger version of this form, prolonging its lifespan?