Princess Celestia and Princess Luna decide to share a foal as a bonding experience. I know what your thinking, their just going to adopt or get a doner and have one of them give birth, right. HA HA, NOPE. They use dark magic to have a mix of their DNA (a waist of time if you ask me, siblings have very similar DNA). The result being a alicorn named Harmony. She has a white coat, a horn with a dark blue tip , wings with dark blue primary feathers and secondary and a light blue mane and tail with 2 light pink streak in it. but all is not as it appears to be.