Back in Equestria where the cold weather grows colder with the growing fear of Twilight's pony friends...

"They should've been here..." princess Cadence mumbled.

" Who?" Luna asked.

" The Kings' Duo," she replied.

Luna nodded. " Ah, yes..."

" The Kings' Duo?" Rarity repeated. " Who are they?"

Celestia walked up to the pony and her friends.

" Ever heard of the Tale of the Alicorn Kings?"

Applejack tapped her chin.

" Sounds familiar. I think Applebloom may have told me about it. Something to do with her class reading the story..."

" Same here with Sweetie Bell," Rarity commented.

" Oh, Oh! I read that story to the Cakes' twins!" Pinkie Pie squealed.

Rainbow Dash tapped her hoof on the ground in irritation.

" Never heard of it. But what does this have to do with this duo? Probably nothing," She snorted. " Not like it'll help our dire situation here..."

Princess Luna smiled. " Funny thou should sayeth the pony tale hath no relation to this duo."

Rainbow Dash smiled sheepishly. Remembering how she dismissed Twilight on the fact that the story 'Mare on the Moon' was all true, she stammered," Y-Yeah, lets, uh, hear the story."

Proof that there are pony tales with some truth? You've got it. The princess of the night was living evidence of that fact.

Princess Celestia cleared her throat.

" The tale of the Alicorn Kings actually isn't very old. Only written thirty years ago, not many are aware of it."

She waited to have everypony's attention before continuing.

The Tale of the Alicorn Kings

Once upon a time ago, there were two princes. One was named UpperCrest who lived in a country called Marelin. He was a chivalrous Pegasus, who flew through his skydom, performing great feats of honor and duty. Prince UpperCrest was born to be a knight and it was his dream to become the commander of the skydom's Pegasi Elite Air Force.

The other prince was a unicorn named Roland, who studied deeply the art of magic. He greatly admired Starswirl the Bearded and worked on perfecting his magical ability to its fullest. He was the apprentice of the kingdom's sorcerer. Roland's country, Hoofindale, was right below UpperCrest's country, Marelin. The two princes often met and became great friends.

But then the war happened--

Before princess Celestia had a chance to continue, Rainbow Dash interrupted.

" The war? What war?" she asked.

" You seem pretty interested in this story," Cadence commented.

The Pegasus cleared her throat.

" Yeah, well, only because the Pegasus guy seems cool..."

Rarity and Applejack exchanged knowing looks and Pinkie Pie just bounced up.

" What's the war?" she asked cheerfully.

" Didn't you say you knew this tory? What're you asking for?" Rainbow Dash wondered.

" Yeah, I did but the I know is filly friendly. There's no way you would tell a foal about war, now would you? I've never heard this version before," the pink pony explained.

Well then, I'll tell you the rest," Princess Celestia said. " The war was between the earth ponies of another country and...King Sombra."

" King Sombra?!" Applejack, Rarity, Pinkie Pie, and Rainbow Dash cried.

Celestia nodded.

" King Sombra had plagued the land and destroyed their homes and food sources to threaten their earth pony king to step down from his throne and make him ruler. It was a great deal of tragedy then. The earth ponies declared war and asked the unicorns of Hoofindale and the pegasi of Marelin to help. The two princes decided to fight in the war against Sombra.

"It took a long time for the ponies to feel that loss was near. There had been great suffering during the five years of war. But then finally, it was just the princes and 60,000 troops. Prince Roland and Prince UpperCrest came together and decided to perform the unthinkable: the Succuberus Omega."

Rarity gasped while the other three blinked.

" Suckleberry OMG??" Applejack said.

"Huh?" Pinkie and Rainbow Dash said simultaneously.

" Not Suckleberry OMG, Succuberus Omega," Rarity told them. They stared at her. The fashionista groaned.

" Succuberus Omega is Pony Greek for 'Surrendering End'. Honestly, that's the language where the word 'pegasus' came from. The spell Succuberus Omega is the absolute hardest, nearly impossible, and lets not forget the #1 forbidden spell that Starswirl the Bearded himself created! The spell brings upon its victim unavoidable doom that causes them to suffer for the rest of their lives!"

" Oh," they said.

" That was a wonderful explanation, Rarity," the princess said. She then cleared her throat and continued.

" So the two princes decided to perform this spell. In order to properly use it, Roland canted the sacred words and stored all his magical energy into UpperCrest, who was charged at the King and BOOM!!!!!"

She stomped her hoof, scaring the ponies.

" The immense power of the spell shot toward King Sombra, but..."

The princess looked at them carefully.

" It did not hit him. Seeing the power of these two ponies, however, King Sombra became deathly afraid and never returned. Knowing that if he had moved the slightest bit during that attack, he would've been suffering forever was enough to make him surrender. But, of course, there's his pride and so he didn't. The princes were full of happiness their countries were now free of the demon that tormented their people. Everypony cheered and celebrated their triumph in great feasts. However, when the princes went home to share their joy with their fathers, both had been poisoned by Sombra.

" That day, the princes became kings and have been known as the Alicorn Kings ever since. And it is believed that the dead bodies of their fathers symbolize his hatred and that he'll one day return and challenge them again..."

The ponies were silent for a long time until Pinkie asked," Why are they called the Alicorn Kings?"

"Because of the two kings' pony races. If you combine a unicorn and a Pegasus, you get an alicorn," Cadence explained. " They formed a strong alliance after the defeat of Sombra and became close to brothers to one another."

" So this Kings' Duo...who are they?" Applejack asked.

" The Kings' Duo," Luna began, " is the result after the great war and years of thou's reign. King Roland becameth Hoofindale's new sorcerer and continued to doth great things. Thus becoming known as Roland the Sorceror. King UpperCrest slayed the evil frometh thou's country and Roland's, thus he becameth UpperCrest the Conquerer.

" Naturally, the kings had families and was born princess Crystal Gem of Hoofindale and prince Feather Flyer of Marelin, both together known as the Kings' Duo."

" So the Kings' Duo is the children of the Alicorn Kings," Rainbow Dash said.

Her eyes widened.

" So does that mean..?"

Celestia grinned.

" Yes, Rainbow Dash. The Tale of the Alicorn Kings is real."

The ponies gasped in amazement.

" Cool!" Rainbow exclaimed." Then they must be as cool as their fathers!"

" And that they are," Cadence said. A frown crossed her face. " Only...I'm worried they may not make it here. Something tells me that they've run into something. And that something's not good..."

The ponies glanced at each other worriedly.

" We called them to come to the castle to help us solve this issue with the disappearing ponies and see if there's any way we can reach Twilight physically in the other world. Since the portal mirror is damaged, there's no way to get to the other world without serious malfunctions...Lets just hope they'll come, Cadence, just hope," Celestia said grimly.

Author's Note

I hope you liked the story I create about the kings and who the two random ponies are in the previous chapter. Later, in some few chapters away, I'll explain how the spell Succuberus Omega works and what you have to do in order for it to work. Please like, fav, track, or follow if you'd like.