By Cloud Hop
"I'm still in your debt for your wonderful magecrafting, Twilight." Chrysalis strode down caverns made of black chitin, a purple alicorn princess trailing behind her.
"Oh, it was nothing, really," Twilight replied, blushing. "It was the least I could do after you saved Equestria from a giant army of talking ducks with laser cannons from outer space."
Chrysalis giggled, and a soft teal light emanating from nearby bio-luminescent moss scintillated off her pink carapace. Her mane was light blue, streaked with purple, and she wore an incredibly frilly dress custom-tailored for her by Rarity. Upon her head sat a silver tiara, and she wore ornate hoofgaurds, specially crafted for her feet, made out of ruby.
"Oh, I almost forgot, I wanted to show you the hatchery before you left today!" Princess Chrysalis nuzzled her marefriend, before backtracking through a different set of caverns. Princess Twilight followed with nervous excitement, always eager to see what wonderful things her lover had in store for her.
Her smile fell once she reached the hatchery.
"Isn't is wonderful?" asked Princess Chrysalis, presenting the grand room with a wave of her pink hoof, and smiling with pride, utterly oblivious to the growing concern of her marefriend.
Normally, Twilight would have agreed, and praised the miracle of life. However, this time, she was having to deal with the very unintended consequences of a simple biological adjustment spell.
Thousands upon thousands of pretty pink changeling nymphs sat inside translucent pods, ready to be born into an enormous horde of little princesses. This was terrifying to Twilight for two reasons. One, it was a giant horde of pretty pink changeling princesses, and two, Cadance was going to kill her. Painfully.
Twilight smacked a hoof to her face and groaned.
"What have we learned today, Twilight?" Asked Cadance in a light and cheery tone. Twilight did not respond. "What was that? You shouldn't be toying with magic without fully understanding the consequences of your actions? Why yes, that's exactly what you should have learned!"
Twilight still did not respond. It's difficult to respond after an enraged alicorn princess rips your immortal soul out of your body and banishes it to the astral plane. Not sufficient to kill a fellow alicorn, but sufficient to ruin their day for a good 300 years.
Cadance laughed, and laughed, until her laughter was no more, and only her quiet sobbing could be heard, as an army of pretty pink changeling princesses blotted out the sun over the crystal empire.
Chrysalis was coming for her marefriend.