It is family day in Equestria and all of the royal families both near and far from Canterlot are celebrating at Canterlot, There there are games, food, laughter and entertainment for the whole family, many royal families are there including Princess Mi Amore Cadenza, The princess of the crystal empire, her husband Shining armor, prince of the crystal empire and captain of the royal guards and their baby Flurry Heart, fancy pants, Fleur De Lis and their children, two delegates from Saddle Arabia with their children and the duke and duchess of Maretonia with their children, everything is happy but all is not right for one princess, Princess Celestia who is still heartbroken and grieving about the permanent loss of her beloved King Sombra in the mirror universe.
In case you don't remember this tale here is a quick recap from reflections story arc of the comic book series:
Princess Celestia and star swirl the bearded have been creating mirrors that transport to anywhere outside of the magical land of equestria, until one day they tumbled into a world where king sombra was a good king and Princess Celestia was an evil princess, Princess Luna in the mirror universe was good when normal Princess Luna turned herself into the evil nightmare moon and then banished to the moon by Princess Celestia until she returned to rein terror on equestria once again until the mane six defeated her with the elements of harmony and turned her back into Princess Luna, When Princess Luna in the normal universe turned back to good, Princess Luna in the mirror universe turned back to the dark side, King sombra in the mirror universe was compleatly unlike the normal king sombra who was a evil tyrant ruler of the crystal empire who treated his subjects just as slaves Unlike Princess Cadance and shining armor and Princess celestia fell in love with Good king sombra, although King Sombra loved her back too, she learnt from star swirled bearded that visiting the universe had caused to much risk to both King Sombra's and Princess Celestia's worlds such as any pain given to the evil Princess Celestia and Princess Luna in Good King Sombra's universe would be transferred to good Princess Celestia and Princess Luna on the other side of the mirror, When Celestia sent the mane six to restore balance to both worlds and at first twilight sparkle came up with trapping both evil princesses in crystal but both she and her friends couldn't trap The evil Princess celestia without trapping the good princess celestia in crystal as well, and so king sombra sacrificed himself to restore balance to both the mirror world and normal world. He was last seen standing next to a tree with the always letter Celestia and mirror King Sombra wrote together to confess their love In King Sombra's garden of wishes where ponies write a wish and put it on a paper wishing, waiting and hoping for it to come true. Princess Celestia kept the very last piece of broken mirror to remind herself of her true love While the mane six destroyed the rest of the Shattered pieces of the mirror, good King Sombra sacrificed himself by transferring all the evil of both the evil Princess Celestia and Princess Luna to himself, thus restoring balance to both worlds once and for all.
just then Her little sister Princess Luna, Princess twilight sparkle and princess Cadance with her Baby Flurry Heart and husband shining armor came into the room,
"Sister?" Princess Luna asked gently,
Princess Celestia turned her head around slowly feeling the same as she has been when standing next to the tree,
"Me and Princess Twilight sparkle are very, very sorry about how all this has happened and so we thought of giving you a very special present for family day", she handed over to her a baby colt from behind her whom she was saving for family day for her older sister all along,
the baby was grey skinned with black mane and had green eyes like the mirror King Sombra before the destruction of the mirror, Princess Celestia was more then a little surprised when she first laid eyes on the baby and asked her sister Princess Luna
"Where did you find him?"
Princess Luna answered, "We looked everywhere in equestria to find a colt who looked just like your beloved Good King Sombra before that mirror got destroyed, however all seemed lost until we came across an orphanage in Manehattan where he was one of the latest editions, he was badly bullied by both most of the older orphans and some of the care takers for looking like our evil King Sombra, and so we quickly asked for adoption and as a present to a very special somepony and that somepony is you"
Princess Celestia did not know what to say first for one minute until he wrapped the tragic baby to her maternal arms and thanked both her sister and Princess twilight sparkle for the present while also crying at the same time,
"He's just as perfect as our Flurry Heart!" Said Princess Cadance "What are you going to name him?"
"I shall name him harmony and he will be very well protected from any pony who wants to compare him to the villain king Sombra, I just can't thank any of you enough" she said with tears still in her eyes,
"aw, Don't mention it" replied her sister happily,
"And by the way I notice that I now have a baby and Princess Cadance has her own too while Princess Twilight sparkle is not ready yet for she is still a teenager, What about you Princess Luna?" Asked Princess Celestia,
Princess Luna happily and kindly replied "I have my own children of the night sleeping in a very special bedroom waiting for me, their dear mother to wake them up at nighttime",
Princesses Luna, Princess twilight sparkle, Princess Cadance and her family happily left the room leaving Princess Celestia to cater her newly adopted baby son,
"Welcome to Canterlot castle my little harmony" Princess Celestia sweetly cooed to baby harmony.