It started innocently enough. Mysti had asked Ciela about hypnosis and if she'd be willing to help her out.
She surprisingly agreed to it faster than Mysti anticipated. Soon enough, she was on the couch in front of Ciela.

"Now, just relax, listen to my voice and follow the stopwatch." Ciela said softly

"Alrighty then, hit me with your best shot" Mysti responded, clearly not anticipating the outcome.
Then it started. The stopwatch swung back and forth in front of Mysti's eyes.

"Just listen to my voice...let go of everything inside your mind...and just feel" Ciela said softly.

And almost as if she didn't have any say, Mysti slowly began to practically sink into the couch. Relaxing into a slow trance.

Her eyes locked onto the stopwatch. She couldn't look away if she tried. Though something in her didn't even wanna try.

"You feel that? The fear...the anxiety of the change? It's withering away with each second." Ciela cooed softly. "Let go of all your anxieties and fears...let yourself feel free."

Mysti's breath hitched violently and her cheeks fluttered with tiny zaps of lightning. Ciela took notice and smirked, continuing her rhythm with the stopwatch.

"That's it—there you go. Let it flow through you. You like the change, you always have" She continued, edging Mysti along more and more.

The second Mysti's inhibitions dropped, fears melting away into a puddle of nothing but the euphoria she always felt—her body surged upward. Clothing tightening quickly around her as her body grew.

"That's it—That's it~ You like that, huh?"

Mysti let out an involuntary "Chuuuu~" as her muzzle grew in. Cheeks sparking with increasing intensity, her body growing faster than she's ever grown before. Her clothes shredding like wet paper.

The couch was a goner as it snapped underneath Mysti. She fell to her hands and knees as her socks were quickly shredded by her paws.

"Whoa.." Ciela stepped back, still swinging the stopwatch. She couldn't take her eyes off of Mysti as she changed. They weren't even five minutes in.

Mysti's corded tail tented the back of her pants. Quickly beginning to shred them apart as her tail ballooned outward and into the ceiling, cracks spiderwebbing outward as her tail hit with a dull THUD.

Her giant paw slammed down on a nearby table, splintering it instantly as her paws continued to grow and form. She continued changing quickly, jaw hanging open as she panted and let out small "raaaiii's"

"Would you like to stop Mysti?"

She didn't even respond. She just panted and blinked.

"You like growing huh? You like feeling the shift...the change? The urges welling inside you?" Ciela cajoled softly.

Mysti closed her eyes, feeling the growth push her higher. She then let out a tiny "Shhh..."

"What was that Mysti?" Ciela asked.

Mysti squeaked out a small sentence, punctuated by her sharp breaths. "Juh—Just....just...keep...keep going..."

Ciela smiled and held back a laugh, continuing to swing the stopwatch. "Okay~ Even if I did stop, it's not like you could anyway."

Mysti whimpered in pure bliss and closed her eyes, the growth seeming to intensify as she ducked lower. Her back pressed up against the ceiling.
By the end of this, Mysti would be taller than she's ever gotten, but that end never seemed in sight for her.
It was gonna be a very long night, but she didn't mind. Not even one bit.