Twilight trotted into her bathroom and set a small bucket down on the lacquered wood counter. "Finally, a night alone to unwind and enjoy some me time," she said with a relieved sigh. "Spike's helping Apple Bloom and her crusaders study, and everyone else is occupied with Pinkie's party." She pulled a box of scented candles out of the bucket and placed them strategically around the small bathroom, then lit them one by one with her horn. "And no studying tonight, so it's just going to be me, Mr. Bing Cropsby, and a nice, looooong soak."
Her horn sparkled as she began running the bath and poured a generous helping of foaming bath salts Luxury had recommended her. As it ran, she began unpacking her tub. A record player first, with the old crooner's melodious tunes already loaded. Secondly, more candles, which she arranged into arcane designs on the sink. Next was Spike's poster of a dragon's glaring eye, which she tucked up into the bathroom's only window and taped down. Lastly, she unloaded several wads of fabric which she tucked into the seams of the door. "Hmm... this could get loud," she murmured, staring at the rest of the tub's contents. "I'd better take more precautions." She squinched her eyes closed and conjured a bubble of silence. A quick effort layered it into the walls and door, ensuring she couldn't be heard. "Wait, I need to make sure no one can interrupt. The last thing I need is someone walking in on me." Chewing her lip, she willed an invisible ring of alarm around each of the entrances to the library, including the loft window. They were designed to pop if anyone came near it, which would alert her to visitors and hopefully knock the intruder on their butt long enough for her to hide.
Finally, she could relax. She shut off the faucet and moved her bucket onto the toilet next to the tub. "At last~" she giggled, admiring the colored steam rising off of the mounds of bubbles. She shook out her mane, then climbed slowly into the bath, inching her way down below the surface to let herself get used to the heat. After several minutes wincing, hissing and wiggling, she finally settled onto the tub's smooth bottom, her head just barely above the level of the water. "MUCH better..." she sighed happily.
Bing Cropsby's silky voice crooned out 'Moonlight Becomes You', which caressed the young filly's ears with its soft tones and slow music. "This is perfect..." The song faded minutes later and another took its place. "Mmm..." The bath was amazing. The salts were still foaming slightly, sending little bubbles rippling along her coat like tiny fingers, and the heat kneaded her tired muscles into perfect relaxation. All of the worries of the day, about her friends, about the upcoming celebration for the Mayor, all of it faded as the sensuous warmth and pressure of the water closed in around her and wrapped her up in a blanket of pure bliss.
Her head sank down below the water until only her eyes and nose were above it. Below the water, a slow, wicked smile curled the edges of her lips. "Almost perfect, that is," she giggled to herself as she eyed the bucket sitting on the toilet. This was going to be /great/.
"Oh no! Look out! It's Moonicron, aaaaaaaa!" screamed Twilight as the huge chunk of transforming plastic hovered over the tub. "Don't worry, I'll save you," she said in a lower voice as she shook a plastic submarine in the air, miming speech by dipping the nose up and down. "Rooaaaah dive dive dive!" The submarine sank below the water and breached a bank of bubbles like a shark, then flew up at Moonicron trailing water. "Launch the laser torpedoes, pew pew!"
"Bwa ha ha, you'll never defeat me. I have force-fields which are immune to your laser torpedoes, Ms. Sparkle." Moonicron threw her spherical head back and laughed in Twilight's lowest evil laugh. "Ah ah aaaaah."
"But not to JUSTICE, Moonicron!" cried a yellow rubber duck. "Taste webbed feet, evildoer!" Cloptimus hopped up and down on Moonicron's head, making squeaky noises with each hit.
But justice was to be denied! Moonicron blasted him with her Death Moon Vision! "Bwa ha ha, foooooaalish Cloptimus. Did you really think your puny justice was a match for MY powers?" Moonicron tried to transform but got stuck halfway. Stupid overcomplicated toys. How did Spike manage it? "Nnngh, curse you Cloptimus. Your justice has made me get stuck. Help me out."
More laser torpedoes flew at Moonicron as the submarine. "Never, Moonicron! You're going to pay for eating Sweet Apple Acres!" A dinosaur flew up out of the tub, covered in pink foam. "Get 'er Pinkiesaurus! Use your anti-force-field teeth!"
Pinkiesaurus leapt up and chomped Moonicron's half-transformed arm. "Rar! You taste like old socks! And candy! Grrrrr!"
"No! Not pink dinosaurs! My only weakness! AAAAAAA! prrrghkkrrr..." Moonicron flopped over into the tub, dead.
"Yaaaaaay! We have saved the day!" cheered Twilight while waving the plastic submarine and foam-covered dinosaur around. Cloptimus the duck bobbed cheerfully upside-down on the water.
Twilight giggled and put the rubber duck on her head and ladled a dollop of foam bubbles onto his bill to form a comely beard. "There. A suitable reward for our intrepid hero." After a moment, she plopped a bubble-beard on herself, too. "Now it's time for..." She flicked her horn at the record player, changing albums. Powerful, racing strings blared as she lifted a toy shark and a battered old pony doll with no head out of the water. "Revenge of the Headless Shark-Pony!"