It is

The mist immediately enveloped Josie, and covered her mouth as she was lifted into the air.

However, before she could really work up a panic, her mind began to feel fuzzy... And in a pleasant manner as well. As if the mist was easing her worries. Her terror melted away, replaced by a serene calm at the situation, feeling reassured that somehow, what was happening to her wouldn't be some terrible fate, though it might seem that way to an outside perspective. Her golden gown disappeared into the mist.

Josie moaned as the mist continued to work its literal magic on her heart and soul, already not wanting it to stop. She also stopped being bothered by the nudity as her inhibitions also melted away. Her normally somewhat serious mind turned towards, all manner of hedonistic and normally impossible sexual acts without the slightest bit of discomfort. She allowed herself to feel aroused as the mist relaxed its grip on her as she stopped struggling, and began embracing the changes.

Then, the mist began to work on her body. Every blemish faded from her skin, from simple pimples to more permanent marks like small moles and even her faint training scars. The mist seemed to be absorbed into her skin as it did its work, producing an absolutely wonderful sensation for Rukia, making her croon as she lost herself in the sensations. "Oh... Oh yeah, keep going!" she moaned, arching her back as she floated.

Then, the sensations running through her intensified in her feet. She looked down, seeing her toes begin to disintegrate, turning into more mist and yet... She could still feel them, and they felt amazing, albeit odd, not quite like toes anymore. The mist moved up her feet, and then her calves, followed by her thighs, before finally ending at her hips, stopping just at her midriff, the transition from flesh to mist actually looking smooth and seamless. The mist around then fully coalesced into what seemed like a long, sinuous tail made of it, attached to her torso, and the other, thinner end firmly attached to the spout of the lamp.

She could actually feel the tail like it was fully solid and part of her body, and she was able to move it on instinct, taking moment to experimentally undulate it, even tugging with it, but was completely unable to detach it from the lamp, or even move said lamp.

Jewellery appeared over her body, and new clothes too. A golden thong; an embroidered gold and purple top that barely reached past the bottom of her breasts and a white, silken scarf. She looked like an expensive Rivaini harem girl.

Then, she felt a pull on her entire being, and saw the lamp seem to get bigger, and closer, and realized she was shrinking down and being pulled in. Feeling a sense of reassurance and security, she didn't fight it, and she knew she couldn't anyway, so willingly let it play out. With an audible pop, she entered the spout.

The golden lamp pulsed faintly on the tavern floor where Josephine had dropped it, its surface shimmering with residual magic. The air still hummed with the remnants of her transformation—a lingering musk of arousal and the faintest trace of lavender from her vanished perfume.