Your smoky reflection in the mirror begins to shift and change in shape, becoming noticeably more compact and thin, and you even feel yourself shrink down slightly, your viewpoint shifting slowly and subtly.
The smoke begins to peel away, starting at your hands. A set of brownish-red fingers with pitch black nails emerge as the fog dissipates bit by bit, the changes traveling down the length of your slender-looking arms to reveal more bare crimson skin.
As this is going on the smoke melts away from your head, revealing a much more drastic change. An enormous, singular eye stares back at you from the mirror, situated in the middle of a distinctly feminine face framed by chin-length black hair. You bring your hands up to your cheeks and watch as the cycloptic demon girl in the mirror mimics your every move. You open your mouth and she does the same, revealing a set of mostly normal human teeth with slightly enlarged canines. You reach up to touch the tiny pointed horns emerging from the top of your head and find them to be firmly attached to your skull.
You continue to prod and poke at your new visage in awe, making various facial expressions and blinking your single massive eye as the changes continue to your body.
As the smoke peels away from your body you see that your shoulders are much more narrow, your frame noticeably thinner, but the biggest difference is definitely the breasts. Your breasts.
They're anything but big, probably a large A-cup or small B-cup, but you now have a pair of perky, pointy tits poking out from your feminine chest, the puffy nipples a slightly darker shade of brownish red than the rest of your body.
And as you're still adjusting to the chilly breeze caressing your perky new acquisitions, you're struck with another shocking blow as the smoke peels away from your noticeably curvier hips and reveals your new crotch: where your dick once proudly stood, your groin now features a small tufty patch of black pubic hair, leading down to a smooth cleft between your legs. Your hands instinctively shoot down to cover your shame, though you're not sure who you're hiding it from exactly.
With the major changes out of the way, the smoke dissipates from your legs and your petite, black-toenailed feet. The transformation is now complete and you're left alone with your nude reflection.
The naked, shivering cycloptic demon girl stares back at you in horror and shame, before a thin strip of brown material appears from thin air and wraps around her chest - your chest - barely covering your modesty.
A short and skimpy loincloth materializes around your hips, the flaps of hide similarly offering minimal coverage of your new genitals and curvy rump.
Finally, a hooded cloak made of a gossamer-thin black material enshrouds your head and shoulders, as you desperately wrap it around your body in the hopes of staving off the cold.
Your status parchment reappears and displays an inky rendition of your new form, along with some text:
Sapphira, Level 1 Demon Mage
100xp to next level
With that, the mirror vanishes, leaving you with the Demon Overseer once more.
"Excellent. May you serve the Demon Empire well, young mage." the priest-like figure speaks, just barely above a whisper.
"W-wait a min-" you begin to protest, but stop at the sound of your high-pitched feminine voice.
"For now, focus on completing your first quest. There will be more to discuss when you return."
You begin to protest again, but the Overseer makes a sweeping motion with one of its billowing sleeves and the floor lights up beneath you.
In an instant, your surroundings melt away once again and you find yourself hurtling through the void...