How alicorns ascend: Twilight ascends
By Urimas Ebonheart

Twilight Sparkle, student to Princess Celestia and bearer of the element of magic is on the train heading towards Canterlot after receiving an important message from her mentor. To say she's both excited and nervous is an understatement, the letter said that she's ready for the next step in her lessons and that both Princess Celestia and Princess Luna are waiting for her at the Castle.

Twilight pulls the letter out from her saddlebag and reads it again for the tenth time.

My faithful student Twilight Sparkle.

Luna and I believe it is time for you to move on to higher levels of magical study after proving your skills with both magic and leadership in protecting Equestria with the elements.

We ask you to come to the Castle as soon as you are able so we may begin immediately, I'm sure you're fascinated at the chance to learn new magic that you couldn't do before and we will teach you all we know. We'll be waiting for you in my room so we may discuss what we need to do.

Eagerly awaiting your arrival.

Princess Celestia and Princess Luna.

P.S. There isn't any tests so don't panic.

Twilight smiles at the letter and rolls it back up into her saddlebags. The trip was quiet and uneventful as the train reaches its destination of Canterlot Station.

"Canterlot Station! Please make your way out calmly and have a wonderful day!" the conductor says as Twilight walks off the train and takes a deep breath of air.

"It's so good to be back in Canterlot," Twilight says before sighing and making her way to the Castle.

Ponies she knows greet her and wave along the way, she greets them back and stops off at Doughnut Joe's bakery quickly.

"Hello, Joe!" she happily greets the large tan coloured stallion behind the counter who smiles in return.

"Little Miss. Sparkle! Haven't seen you around for awhile," he says to the purple mare.

"Yeah, I've been living down in Ponyville for a few years now, how's business been?" the young scholar asks him.

"Not bad, the Princesses make orders from me now and then so that's been great for publicity. So, what can I get for you?" he replies and asks.

Twilight hums in thought and smiles. "I'll have a dozen glazed doughnuts, I'm off to see the Princesses and it'll be a nice gift to share with them," she orders and replies.

Joe chuckles and starts filling a cardboard box with twelve glazed doughnuts. "I see, well please say hello to Princess Celestia for me! That'll be twenty bits," he says and tells Twilight.

Twilight pays for the confections and smiles. "It was good seeing you again, Joe. I might be back to take some more back to Ponyville with me after my meeting with the Princesses," she tells him and levitates the box onto her back.

"Alright, Sparky. Take care now!" Joe says to the mare making her giggle and exit the store.

After a fourteen minute trot, Twilight reaches the Castle gate and the guards let her in. "Thank you, gentlecolts," she thanks the guards who stand proudly at their posts.

Navigating her way through the Castle she reaches the private chamber of Princess Celestia where she knocks on the door lightly.

"Come in!" Princess Celestia calls out from within and Twilight opens the door and enters.

"Hello, Princess Celestia," Twilight greets her mentor and spots Luna next to her. " and you too, Princess Luna. I’m so excited! What new magic will I be learning?" the unicorn asks eagerly, ready to learn new magic.

"Hello, Twilight. It is good that you are eager to learn more, but first you'll need to be... ready for it," the Princess of the sun replies and stands up. Her horn glows and the door is locked as well as the room soundproofed, both went unnoticed by Twilight. "We both believe you are ready for the next step in your life, to be more than you are right now. So we have decided that it is time for you to ascend as an alicorn," she tells the purple pony and walks over to her.

Twilight is staring at her mentor slack jawed. "A-A-An alicorn!?" she shouts out in surprise. "B-B-But I'm just a unicorn! I d-don't think I'm ready or w-worthy of such a thing!" Twilight replies and backs away from the advancing white alicorn.

"You're more worthy than you think. You recovered the elements, freed my sister from her jealousy, defeated Discord, stopped king Sombra's return and saved the world many times over, your magic is strong and your leadership skills are good, you're ready," Celestia tells the panicking mare.

"Verily, young Sparkle. We owe thee a great deal for freeing us of our madness, we also believe thou art ready to join our ranks," Princess Luna tells her.

Twilight looks between the two of them and sighs. "I... will I be able to stay with my friends in Ponyville?" she asks them.

Celestia smiles warmly and nodded. "Yes, it'll take many years for you to become accustomed to the new power you'll receive, and you'll be able to be with your friends until the time is right for you to rule Equestria at our side," she tells Twilight lovingly.

Twilight bites her lip and nodded in acceptance. "O-Okay then... if you're sure this is right," the unicorn replies nervously.

"It is, but we must warn you, the process is... unconventional," Celestia warns her.

"Unconventional? How so?" Twilight asks confused.

"We alicorns have both sets of genitals," Celestia begins explaining making the purple mare blush as Celestia releases the invisibility spell concealing her sheath and testicles. "and we cannot sire nor bare foals, but we can turn a pony into an alicorn with them... You see, the pony who is to ascend has to go into the testicles of one of the alicorns where they'll absorb some of their magic, in your case it would be pegasus magic before being placed into the womb of another alicorn to absorb some earth pony magic. Once you've absorbed enough and your body transformed into that of an alicorn's, you'll be... I suppose reborn as one of us gives 'birth' to you," she finishes explaining the process to the shocked unicorn.

"What!?" Twilight yells in horrified confusion and a heavily flushed face.

"Tis true young, Sparkle. We and Tia art not true siblings, the previous alicorns Faust and Galaxia chose us to ascend in the same manner after we defeated Discord with the elements, before they left Equus to help another world. We too were unsure but we do not regret our choice. Thou can still choose not to do this, but we would be honoured if thou would join us," Luna tells the distressed mare.

Twilight looks between the Princesses and then down at Celestia's hind legs where the large balls are hanging between her thighs. She gulps and looks up at Celestia. "It's not painful is it?" she asks still not sure she wants to do this anymore.

"On the contrary, it is rather pleasant for all of us, you'll feel what we'll feel and you don't need to worry about breathing as our magic will keep you alive and well," Celestia informs her and gently strokes Twilight's mane.

Luna is starting to get excited as her own sheath and testicles are revealed, her black cock beginning to emerge from its sheath as it droops down before getting stiff and slapping against her stomach.

Twilight couldn't help but stare at the display as Celestia begins to emerge from her own sheath, the pearl pink cock swelling up as the flare expands eagerly.

"I-I-I..." Twilight stammers unsure of what to do anymore.

"Relax, Twilight. It'll be fine, you'll be okay and you'll be better with magic as well, are you ready?" Celestia tells and asks her kindly as she levitates Twilight’s saddlebag and the box of doughnuts off her back.

Twilight looks at Celestia's eyes before looking back at her cock. "I..." she starts and gulps, she really does want to learn new magic, and if this is the only way then so be it. "I am," she answers quietly.

"Very well, Luna will start off and then place you into me, is that alright?" Celestia asks the mare to calm her down.

Twilight could only nod as Princess Luna walks over, her cock twitching in anticipation for its new occupant.

"We shall begin as thou placest thy horn into our spire," Luna tells Twilight who locks up nervously. Rolling her eyes, Luna levitates the unicorn and gently places the tip of her horn to her urethra and pulls her into it, Twilight shudders as the first inch of her horn sinks into the black cock flesh which expands to allow her inside.

"That's it, Twilight. Relax, soon you'll be one of us and we can begin teaching you alicorn magic," Celestia soothes her student who after a few seconds visibly relaxes but retains a heavy blush.

Pulling her further in, Luna's flare bumps against Twilight's head getting the Princess of the night to gasp and moan before increasing the force as her flare widens and the unicorn starts to sink in inch by inch. The black cock bulges as Twilight's muzzle is engulfed and then her neck.

Twilight for her part starts panicking as she tries to breath but then relaxes as she finds she can breath just fine. Alicorn magic is very powerful and can bend the laws of the natural world for their needs, such as this.

Luna shudders in pleasure as the purple pony's withers slip into the flare and down to her stomach. Twilight's head then enters the large sack of the Princess, her horn glowing and the sight of sloshing cum greets her as she's sucked in further to her flanks. She’s still second guessing herself at the sheer insanity of this method.

Celestia is watching from the side moaning as she rubs her cock with a hoof. Watching as her student is sucked into her sister's shaft and balls. She then gasps as she dribbles out some pre at the thought of her sister cumming her student into herself.

Luna grunts as Twilight's forelegs are fully inside her cock. The flared tip slurps down the unicorn's rump, hind legs and tail until finally, the purple mare is pulled into her sack where Twilight splashes into the pool of cum inside.

Twilight gasps as she rights herself upright making Luna shiver from her squirming, Twilight couldn't help the cum that got into her mouth and found its taste delightful, she could also feel foreign magic starting to fill her making her sides itch as if something was trying to break through.

"So, Lulu. How does she feel?" Celestia asks her sister.

Luna shudders again letting out a long moan as Twilight rubs the inner walls of her sack. "Delightful! We can not wait to stuff thy marehood and pump her into thee!" she replies and gasps as a dribble of precum escapes her tip.

Celestia smirks, walks behind Luna and mounts her. "Then while she absorbs the magic she needs, I'll have my fun before you take me," she says and pokes her cock forward to find her mark.

Luna groans as Celestia pokes her winking clit a few times before the pearl pink flare finds its mark against the black lips of the night alicorn. With a mighty push, the flare spreads her sister's slit wide open and slips into the warm wet pink inner canal making them both gasp in pleasure.

Not being able to sire or bare foals has allowed the two alicorns to rut in secret as much as they want without worry, a great way to relieve stress built up from dealing with the nobles and their nephew. Celestia drives her cock all the way in as excess fluids seep out of Luna's snatch.

Within the Princess of the night's sack, Twilight writhes in pleasure feeling what Luna is feeling in her own genitals. She couldn't resist her hoof from finding her own arousal and begins vigorously rubbing herself. The motions make Luna gasp and cry out as her pussy cums all over Celestia's cock and balls.

"That's it, Lulu. Cum for me, squeeze my cock hard!" Celestia tells her and pulls back before thrusting into the trembling dark blue mare, her sack slamming into the throbbing, winking clit of Luna.

"Yes! Pound our rump, sister! Claim our plot!" Luna cries out happily as she gets just what she asked for.

Celestia picks up her pace bringing her hips back before slamming into the moaning alicorn repeatedly. Twilight is on the verge of release herself as the sack she's in shakes violently, coating her in Luna's cum constantly as the sack seems to be making more and more until she's submerged in the white gooey fluid. The magic flowing into her feels wonderful and she wonders to herself why she was even nervous about this.

Luna screams in bliss as her second orgasm rips through her body. "Tia! Hurry! Fill our womb with thy cum!" Luna begs her sister as Celestia grins and redoubles her thrusting, the tip of her cock tingling as the flared tip rubs against the bumps and ridges inside Luna's hot tight pussy.

"Don't... nnnff, worry, sister! Ahh, I will fill you oooh, to the brim!" Celestia replies as her own sack expands with more cum, ready to deposit the load into the eager womb at the tip of her cock.

The alicorns both grin as they hear Twilight's muffled cries of pleasure within Luna's sack as the unicorn cums hard, adding her own fluids to the mix.

After a few more minutes of relentless bucking, Celestia shudders and grips her sister's barrel tightly. "Oh, Luna! I'm cumming! I'm going to fill you up!" she cries out as the first blast of thick hot cum splashes into Luna's womb making the dark blue mare cry out in absolute bliss.

"YES! FILL US UP, SISTER!" Luna yells using the Royal Canterlot Voice. Twilight screams as well as another orgasm rips through her shivering body which excites Luna's twitching cock making more pre dribble out onto the floor.

Celestia bites down on Luna's neck making the blue alicorn shudder and cum again as the white alicorn continues to pump load after load into the screaming night alicorn until it can no longer be held and gushes out around the thick girth stuffed fully into her trembling sex.

After a long while of gasps, moans and whines, Celestia pulls her still hard cock out of Luna's pussy as a deluge of white cum splashes onto the marble floor like the waterfall at Neighaggra Falls.

Once the flow stops, Celestia hops down from the well fucked rump and begins licking Luna's groin clean from the cum still coating it.

"S-Sister! Thy student is ready..." Luna gasps at the tongue cleaning her rump.

Celestia smiles and walks in front of her sister and presents her rump as her tail lifts up to the side. "Then give her to me, Lulu," the sun alicorn coos and spreads her hind legs.

Luna bites her lip at the sight of her sister's dripping pussy and walks over dragging her sack low where Twilight is basking in her afterglow. The Princess of the night rears up and slaps her cock flare into Celestia's sack getting moans of need from both of them.

"Quit teasing me and plug me already!" Celestia whines and wiggles her rump against Luna's barrel.

With a snort, Luna rears up higher and hugs the white mare's back to her barrel and then with expert precision, thrust her black spire into the light pink lips as the sound of Celestia's pussy slurping in Luna's shaft to the hilt fills the room, followed by their moans along with Twilight's muffled moan; the sensation of a phantom cock at her groin making her squirm in the cum bloated sack she's sitting in.

Luna's eyes roll back as her mind is flooded with the pleasure of her sister's hot canal squeezing her shaft and Twilight's squirming in her sack.

"Oh young Sparkle seems to be, nnngh, enjoying this as, oooh, much as we are!" Luna cries out happily and begins thrusting into Celestia's wanting sex, the squelching from the amount of pre Luna is drooling into her sister is obscene, but necessary to allow Twilight easy passage into her mentor.

Twilight is feeling light headed from the new kind of magic flooding her system and is loving it. She can feel Luna's sack swing with every thrust into Celestia and moans at the visual image of Celestia's face contorted in pleasure... she then wonders if once she's an alicorn, would her mentor rut her as well? She could not deny her dreams of being pinned down by her Princess and ravished into a puddle of bliss was a forbidden secret she craved.

Luna leans forward and begins to nibble on her sister's left ear making her whiny happily at the attention. The black cock's flare expands and rubs all over the silky walls of the elder alicorn making her squirm under her lover and mewl in bliss as more pre fills her up. Her cervix begins to stretch and loosen for its soon to be delivery.

The midnight blue mare gasps as her flare pops into Celestia's womb making them both shudder in agonising pleasure while Celestia cums on Luna's cock.

Twilight continues to rub herself as the feeling of her phantom cock builds up and she knows Princess Luna will soon push her into her beloved mentor's womb. The thought alone makes her cum sending a jolt up Luna's spine and triggering her own orgasm.

Luna's sack then contracts and squeezes a lot of her cum into the sun alicorn to prepare her for Twilight's journey. The purple mare is then pushed up into Luna's cock, the sheath bulging as the unicorn's head squeezes through and makes contact with Celestia, spreading her pussy wide and making the alicorn cum in euphoria.

Her orgasm sucks on Luna's black cock pulling Twilight faster up the shaft and through her cervix. The white mare screams and cums again as Twilight is cummed out into her womb and curls up into a ball as the unicorn shudders from her own intense orgasm.

Both alicorns tremble and moan in their afterglows as Luna slowly pulls out and Celestia's cervix seals shut, keeping her student locked in and warm. Twilight can feel another kind of magic start to fill her and moans happily at the warm sensation of safety her teacher's womb is giving her.

Luna jumps off her sister and guides the bloated mare to her bed and lays her down on her side gently as some cum leaks out of the pink lips of Celestia’s stretched slit. "Oh, Lulu. It feels so wonderful! I feel like a mother!" Celestia pants out with a dopey grin and blush on her muzzle.

"We know the feeling, sister. We still remember thou filling us with Cadence during her ascension before our descent into madness," Luna replies and nuzzles her sister's pregnant looking belly.

The two alicorns chat excitedly for an hour eating a few of the doughnuts Twilight brought before Celestia feels Twilight is ready to come out. Twilight for her part is happy and in a semi-aware state where she hasn't noticed her body's changes. She now has a pair of wings, a longer horn and her physique is more like her sister in law Cadence, thin, slim and elegant. She also has her own sheath which is sporting an erect dark purple cock and balls.

"Okay my student, it is time for you to come out," Celestia says sweetly and grunts as she begins pushing.

Twilight moans as her horn is sucked through the sun alicorn's cervix, followed by her head and withers. The feeling her her mentors walls caressing her fur gives her a mild orgasm, leaving a small pool of both her pussy and cock's fluids in Celestia's womb as light greets the new alicorn.

Celestia shudders in ecstasy as she gives birth to the newest alicorn and trembles from an orgasm.

Twilight's rear hooves slip out and she's coated in both Luna's, Celestia's and her own cum as it pours out with her, the purple mare gasps and opens her eyes and looks around to see a light pink gaping and leaking vagina just below her hooves and trembles as the memories of being pushed into and coming out of it flood her mind making her smile.

"Twilight? How do you feel?" Celestia asks her student and now fellow Princess with laboured breaths.

"I feel... good. So much magic is flowing through me!" She replies and sits up. She can taste the alicorns cum on her tongue.

"That's wonderful, but I believe we should all get cleaned up first before moving on," Celestia replies and shakily gets off the bed.

"A grand idea, sister! We shall prepare a bath while thou shall explain to young Sparkle her new responsibilities as a Princess," Luna says and heads into Celestia's private restroom.

Twilight looks up to her mentor and smiles. "I really need a bath..." she comments and giggles as she spreads her new wings making the cum coating them stretch across her feathers.

Celestia giggles along with her. "We all do, and once we're done, we shall explain what you'll need to do as a princess," the white alicorn tells her and nuzzles the cum covered mare. “But first, I’ll need to teach you how to conceal your new, equipment,” Celestia says looking at the dark purple cock still erect on Twilight.

After quite a few long baths, the three head down to the Dining Hall clean and fresh where the guards and maids gawk at the newest Princess of Equestria.

The day draws to a close and the three alicorns are cuddled up together on Luna's bed as Celestia's is still being cleaned.

"So how dost thou like being a Princess, young Sparkle?" Luna asks the purple alicorn with a wing draped over Twilight. Celestia also has a wing on her student's back lovingly.

"It was scary at first, but I think I can handle it, I just wonder what all my friends will think..." the alicorn of magic replies thoughtfully.

"I'm sure they'll be fine with it my dear, but for now we must rest, you still need to grow into your new body and learn how to control your alicorn magic," Celestia tells Twilight and nuzzles her. The newest Princess returns the nuzzle and eventually falls asleep.

Luna looks to her sister and smirks. "How do you think she'll feel when it is her brother's turn to ascend?" she asks her.

Celestia giggles and kisses Twilight just above her horn. "Oh, I'm sure she'll be eager to help him when the time comes," the white mare replies as both of them giggle quietly before going to sleep themselves.

And thus is how Princess Twilight Sparkle ascended

Author's Note

I regret nothing, no ponies where harmed in the making of this weird adventure.

Also if this receives 200 likes I'll make a sequel with Twilight, Cadence and Shining Armour. That'll be fun!