As wistful, sparkling, crystalline snow fell from the moonlit skies above, a pair of proud pony parents pampered their precious pony progeny inside a shimmering, crystal castle. Little Flurry Heart, now old enough to be excited for the Hearthswarming activities planned for the day with her fellow classmates at school, snuggles down into her plush, pleasant and pillowy bed. She whispers a barely-audible "Goodnight" to her beloved parents before drifting off to the Dreamrealm. Although the shimmering castle and the surrounding city in which they resided was plentifully decorated in the spirit of the season, Flurry Heart's dreams were a swirling cascade of ribbons tying themselves into bows atop lovingly-wrapped gift boxes, with gingerbread ponies raining from the sky and snowballs packed into cute piles around every corner. An impossible Hearthswarming paradise stretched as far as the eye could see in every direction, a winter wonderland with candy cane pillars supporting gingerbread castles and a blanket of snow dotted with gifts and jam-packed stockings abound. Flurry would prance and play in the snow, making snowponies and nibbling on nearby gumdrops as she wished that everypony could experience the joy of this wonderful adventure she enjoyed in her times of slumber.
Suddenly, amidst the fun and frolicking, a saddening thought occurred to her amidst her imaginings of bringing others to this place to share. This was the time of Hearthswarming, and her parents have always taught her that "Everypony deserves a gift on Hearthswarming", and yet.... There might be a pony out there, somewhere, that isn't getting one! As the colors began to fade from the nearby candy canes, Flurry knew that this thought was too glum for such a cheery holiday, and it was up to HER to go that extra mile for somepony else! But how was she ever going to see somepony like that? She lived in the wonderful Crystal Kingdom, with her beloved parents, and loveable pony citizens... Surely they had wonderful plans in the works! If only she could find her way into the dreams of somepony far, far away.
"But how in Equestria am I ever going to find the pony that is least likely to get a gift for Hearthswarming....? Oh, Luna... You've been so wonderful to me, bringing me these wonderful dreams filled with joy! I know this is a lot to ask for, but... If you're walking this dream, is there any way you could help me? I'll do anything!" Little Flurry Heart cried out into the snowy night sky of her beloved slumberland and as she heard naught but the echoes of her own plea flee her, her head slumped down in rejection.
"And what, precisely, would this young one with such a heart filled with passion want?" Right before Flurry's very eyes, appeared a familiar midnight purple pony with a mane and tail full of sparkling, shimmering stars akin to the night sky. Stepping out with untold grace and majesty, none other than Luna herself joined the little filly in her dream, all to answer the young one's cry.
"Luna! Luna! It's been so long since I saw you! Oh, thankyouthankyouthankyouthankyou!" The little filly leapt up and wrapped her forehooves around the much larger pony of distinct but humble nobility, "I need your help! I want to give a gift the pony that is least likely to receive one for Hearthswarming Eve! We both know that I'm stuck in the Crystal Kingdom, and cannot go find them myself!"
"Stuck, you say...?" A canted head caused the stars in her mane to flicker and a few to shoot across the night sky.
".... Y-you know what I mean, Luna! Mom and Dad won't let me go, so my last hope for making this happen is with your Dreamwalking magic! Oh, please! Pleasepleaseplease help me! It would be the very best Hearthswarming gift you could ever give me!"
"Well...", the midnight pony smiled wide, unable to hide just how touched and inspired she was by the passion and determination that this little one showed before her. It reminded her of herself when she was but a filly, so many, many, many years ago! "I guess I could grant you this gift, though you have yet to tell me whom it is you seek to give your gift to."
"That's easy!" Flurry spouted before she pondered a few moments to herself, "Uhhhhmmm! Wwwweeeelllllllll.... The pony that is least likely to get a giiiiiift... Would likely be a very, very bad pony. Maybe the worst, even!", she exclaimed before a particularly large snowflake landed upon her nose, of which she observed with crossed eyes before shaking if off.
This time, her head canted the other direction, "The worst pony...? I don't believe there is such thing as a 'worst' pony, little Flurry Heart. One thousand years ago, most of Equestria might've agreed that -I- was 'the worst pony'... But look at me now." She stood proudly, her night sky mane and tail lightly bellowed in the gentle breeze that blew through, offering only enough chill to remind of a wintry season. She reached behind her and tugged out a white and orange scarf with her beloved sister's Cutiemark emblazoned upon it. She wrapped it around her neck and smoothed it out to maintain that majestic stature she exuded so effortlessly.
After another few moments of pondering, an idea struck the little filly like an apple falling from a tree. "That's IT!", exclaimed the tiny pony as she bounced around in circles in excitement, "We need to pick a pony who needs a little love so they can have a chance at redemption! Thinking back on the stories that I've been read about Auntie Twilight's adventures with the Elements of Harmony, I know who I'm gonna visit!"
"Oh, this sounds exciting, but also a little worrisome, little Flurry Heart! Pray tell, whom would this creature be?", Luna didn't waver in her regal pose, the wise mare knew that trouble was coming, though she was confident that the little one standing before her deserved the chance to spread Hearthswarming spirit to any whom needed it.
"Cozy Glow! Many ponies believe that she's the pony with the darkest heart, and she's stuck down in Tartarus where no creature is going to get her a gift! THAT'S who I need to visit!"
Once again, the midnight mare tilted her head, this times with ears perked, "Are you suuuuure that's what you want, little one with a big heart? She is quite nasty and will assuredly be quite cross with you for trespassing on her dreams."
"Uh-huuuuh! Sure I'm sure, Miss Luna! She needs a gift most of all for this Hearthswarming Eve! I bet something wonderful and nice would help shine some light on the darkness that her heart is stuck in!"
The mare pondered this proposition again before giving a consenting nod, "I will grant you this Hearthswarming wish, little one. Although this is not something I would normally allow, knowing what it's like having one's heart overtaken by darkness, I understand what you are trying to accomplish, and only wished that I had somepony like you when I was imprisoned upon the moon to give me such a heartwarming consideration. Just be careful, little one! As I said before, she is cunning and will likely lash out at you for trespassing!" And for the first time, the regal mare paused in her speech before giving a smile, "Also... Luna is fine, little one. We're friends, are we not?"
"Heehee! Yaaaaaaaaaay!" little Flurry Heart hopped and skipped and pranced about in glee. Her heart filled with newfound joy for having been given the opportunity to make the holiday she loved so much just that much warmer for somepony else! As her celebrations eventually calmed down, she looked around to thank the majestic mare, only to find her gone, and a snowpony in her place, with the Celestia-colored scarf adorning its neck.