by Europa
"Aaaaah," she sighed, sinking into the underground basin. The off-green fluids surrounding her crept around her chitin, seeping into the damaged cracks to heal it, buffing out scratches and slowly popping out dents. "This is just what I needed."
Taking a deep breath, Chrysalis dove beneath the surface and allowed the thick fluid to wash over her, sticking to her mane. She opened her eyes, looking up through the green bath to the ceiling of the private cave. She frowned and cocked an ear when the strands over the doorway parted, admitting Twilight Sparkle inside.
Chrysalis rolled over and swam to the surface, taking a deep breath and shaking the slime out of her eyes. "Didn't expect to see you here, Twi!" she said in greetings to her marefriend.
"I was looking for you; I was worried," the alicorn admitted.
"Well as you can see, I'm perfectly fine."
"You don't look fine. Your exoskeleton's cracked, and you're bleeding!"
"Actually, it's already scabbed over. This stuff really does the trick for changelings." She took a deep breath to fill her lungs with buoyant air, then floated on her back. Twilight sauntered over and lifted a hoof above the pool. "I don't recommend coming in, however. It's medical to changelings, but it's a powerful acid to other life forms."
Twilight retreated her forehoof with a strangled 'eugh' and looked across at her. "Well, then don't let me bother you. I'll just wait on your bed."
Chrysalis rolled her eyes and summoned her magic, wrapping up Twilight and dumping her into the pool. The pony screeched, taking a big gulp of the non-toxic slime, and flailed around for a few seconds before finding her balance and coming up with a sputtering cough.
The changeling, meanwhile, burst into laughter, rolling against the edge of the pool and pounding the stone outside with a hole-ridden forehoof. She looked back at the soaked, not-acid-eaten pony. "You... you should see the look on your face! Snrrk - AHAHAHAHAAaaa!"
The pony, paddling to keep herself afloat, glared at her. "I hate you so much."
Chrysalis got a hold of herself and wiped a tear from beneath her left eye. "Oh, relax. You're fine. At the very most you'll smell like a changeling for a few minutes later, and you go around doing that enough as it is thanks to me." Twilight blushed bright red. She never tired of making her do that, the novelty of blushing red just never got old. But she still looked angry. Chrysalis softened her expression and swam over to her. "Hey, Twilight, I'm sorry. I didn't mean to scare you that bad." She kissed her forehead, right beneath her horn. "Forgive me?"
The pony sighed and kissed her in the same spot. "Sure, sure." Then she swam away and, with a wing, splashed Chrysalis with a torrent of slime, resoaking her moth eaten mane.
Chrysalis blinked, then grinned. "Oh ho ho, it is on!"