The Ball Game

WARNING
This is an extreme fetish story. This is by far the most fucked up thing I've ever written - almost comedically so - and is my own homage to the world-ending chaos of Equestria's Finest Hour.

One day, a magical wave hit Equestria that suddenly and abruptly granted male genetalia to every single female pony in Equestria. Though initially confused, the mares quickly realized they could rub them to achieve orgasm. What took a bit longer, though, was the odd physiology of ponies that caused a strange anomaly: every orgasm performed by a mare would always be more intense than the last, stacking infinitely.

With almost complete perfection achieved, many ponies began wondering if they even needed males at all anymore. And then....

(Spoiling the rest due to even the description being highly grotesque)

All male ponies were killed years ago. The now female population had decided upon their own rules. Life thrived until one fateful day, it was accidentally discovered - if a pony destroys another pony's testicles, the victim's mind is slowly and painfully erased as they scream in agony, before becoming mindless slaves to the destroyer. The destroyer also gains their own prize, as their own balls become tighter, their entire penis growing slightly. The victim, now without a will of their own, is forced to watch through the eyes of an empty husk as the rest of their life is spent sexually serving their conqueror.

It was outlawed at first, of course, but that was never going to last. Power soon festered in the minds of those interested in it. Before long, it was turned into a deadly game - The Ball Game, wherein two confident mares battle each other in attempts to burst the opponent's sack. Due to the extreme penalty of losing, fillies aren't allowed to play - but that doesn't stop them from doing so anyway behind closed doors. The most extreme disciplinary actions for bad foals involves auctioning them off to the rich to have their testicles destroyed by them.

After a while, Princesses Celestia and Luna were ruling with iron hooves, smiting those who would dare oppose them, both now sporting massive penises capable of devouring ponies whole and painfully transforming them into semen, a fate which befell many of their opponents. They are now served by many, terrified of the fate of losing a battle to the sisters.

In Ponyville, Twilight Sparkle, former student of Celestia, is feared in her own right, having destroyed many ponies in her hometown. She and her friends maintain a tight grip on everyone around them, including their remaining living female family members. Spike, the only male left alive, was recently killed by Twilight for "being too much of a faggot", so she's decided to set her sights on the princesses.

Just the thought of bursting the Princesses balls, effectively killing millennia-old beings who never thought their deaths would come, makes Twilight hotter than she can bear...but will she succeed? Or will her confidence and ambition be the end of her?

Fetish-specific tags: Ballbusting, Death/Snuff, Cockvore, Cum Transformation, Fillycide