"Shit!" Mary swore under her breath, quickly putting her notebook and pen down and peeking over the lip of the pot.
On the bottom, Titania lay, face down and unmoving. Oddly enough, there was little left of the potion, and Mary swore she could see the last dribbles disappearing as if absorbed at lightning speed by her skin. She hurriedly fished out the unconscious fairy and placed her on the table, listening to her chest. Luckily, she could still hear the faint fluttering of a heartbeat amongst her breasts. Then, Titania gasped as if coming back to life. Her eyes shot open, blue, but unseeing as her body was rocked by shudders.
Her limbs spasmed against the table as she began to distend and grow. Mary watched in amazement as the Height vial kicked in, multiplying her current height by five. Her arms stretched out, long and thin, followed by her legs and torso until she looked less like a dainty fairy and more like a 4-foot slenderman. Her body then filled itself in, fat and muscle bloating out to proportionally return her to what she used to be.
She blinked, sitting up and running her hands over herself, a grin breaking on her face. "Wow, that was sure something! How big am I now? Quick, measure me-"
Titania was cut off as a feeling of pain took over her body, doubling over and crying out. Suddenly, she shot up a foot, then another, then another. Soon, she had gained four and a half feet and came crashing off the table, sprawling onto the floor. Mary looked down at the dazed fairy, now eight and a half feet tall, as her muscles trembled before beginning to grow. Her soft, pliable body grew hard in a matter of seconds, each ounce of fat replaced by muscle. It grew beyond toned to the point where each muscle was defined as if chiselled by Michaelangelo himself. Titania breathed a sigh of relief. Then the real muscle growth started.
Each muscle ballooned to huge proportions growing bigger and bigger every second. Grotesque and oversized, Titania watched as every blood vessel popped over the striated muscle. She was lifted off the ground several inches as her thighs and buttocks grew to boulders of muscle. More than that, each heaving, vascular mountain suddenly felt packed full of power, twitching, just waiting to be released. Each inch was held tightly by her control, and she suddenly knew she could flex any one of them, bursting them into even bigger proportions, with just a thought.
More and more power welled up, beyond humanly possible. Titania knew if she wanted, she could bring the entire house down with a mere flick of her fingers. She picked herself off the floor, extending to her huge, 8'6 figure. Mary nearly cowered beneath the shadow of her imposing figure. Bigger than a bodybuilder's wet dream, massive, impossible muscles burst from every available surface. Her arms were over a foot in diameter alone. Veins the thickness of Mary's fingers crisscrossed the incredible musculature, pumping blood and heat to her skin. Mary could almost see heat waves coming off her.
Behind her, two deceptively dainty wings beat hard, causing winds that rattled the walls and sent furniture flying.
"Guess I won't have trouble flying with these," Titania smirked, as she lifted herself a few inches off the floor and darted around with terrifying agility. She relished the shock horror on Mary's face at her incredible speed, strength and size, before landing. "But, I suppose the real gift is these babies."
Pulling her 8-foot frame down into a crab pose, every muscle burst outward, fighting for a place on her titanic body. As she did so, her biceps curled against her breasts and pushed them forward. No longer made of soft fat, her two mammaries were inexplicably made of pure muscle instead, meaning she could flex them outward as much as she liked, or crush a man's cock to dust between the boulders. As she flexed, though, Mary noticed an odd sheen across Titania's skin, as though she were covered in oil.
Remembering the vials she had added, she looked down at the pen in her hand. Then, with all the force she could muster, she rammed it hard into Titania's arm. Not a scratch. The pen, however, had crumpled in her hands. Titania grinned wickedly as Mary grabbed the largest knife she had and aimed it towards her huge muscle-breast. The knife was nothing but a bent ball of metal, and Titania walked away without so much as a dent. Mary's jaw dropped.
"Of course! With the dosages of 'Durability', you've become invincible!" She reached for her notebook. "I have to write this down."
"Not so fast, sweetheart," Titania said, moving lightning quick to slam one giant hand on the notebook. She tossed it aside as she stepped up to Mary, looking over her huge frame at the small, 5'4 girl. "Too much writing and not enough observing. I'm real, I'm huge, honey, take it all in."
She could see Mary trembling from repressed pleasure as she leaned down, hot body nearly pressed against the human, breath coming as hot steam as she whispered against her neck. "Let's see what else these vials can do."