The receiver chamber hummed loudly as Mary slowly solidified. She was still waving her hands in panic, trying to catch the poisonous spider on her skin. She didn't really notice that she swung her arms faster then ever, so fast that they ended in a blur.
As soon as the door opened she started to ran in her panic but in a blink of an eye, she hit the wall. Small pieces were falling off the wall as cracks winded from the place she it the wall.
The impact somehow calmed her down as she regained focus after her anxiety attack. She turned around and looked at the chamber, it must be at least 20 feet way. But she was inside the changer just a few seconds ago. This was the time she realized, that her experiment must be a success. She must have gained the ability to move very fast from the spider. Half in anticipation half in fear she started to examine her body. She was shocked how drastically her appearance had changed.
All but 6 legs were gone. She was standing upright on only two of them. They looked almost human, but were slender and toned. She was only standing on the ball of her foot and her heels had grown like a sharp spike. Her legs were colored in a dark shade looking looking quite defined as her natural high heels highlighted her calves.
Right above her hips two pairs of long and thin spider legs were coming out of her back. She didn't really know if they were arms or legs but she had full control over then. Different to her lower legs, those 4 appendages were a lot longer and thinner and ended in one sharp spike. It looked quite dangerous to her. Those legs were covered in some kind of a chitin armor.
Her former arms changed not much as they were a bit more defined and showing a small hint of musculature. They were colored in the same dark shade as her legs, looking also kind of hard. Her fingers looking some kind longer and her nails were pitch black and sharp like claws.
Her skin must be a mixture of chitin and her old human skin she assumed. Her stomach has vanished almost completely showing a well defined sexy stomach which were rock hard from her chitin skin. Her boobs were pushed nicely up by her toned abs and strong pectoral muscles behind them. She got quite aroused when she touched her hard abs and peaky breasts.
With a soft moan she confirmed, that she liked the changes. Mary realized that she must be shrunken a bit as everything looked big around her.
Beside that noting much changed about her appearance, her face and hair were mostly the same.