“And now we have a unique opportunity.” Mary said and then she scrolled the tags up to the "Mythical" section without paying attention to that. The vial on her hand was still a ‘Syberian Tiger’ and when she put it back on its place, its label changed to ‘Black Widow Drider’. Next to it, there was several other drider vials, such as brown drider, jumping drider, trapdoor drider and so on. She picked the ‘Black Widow Drider’ vial and opened it.
"I am amazed at how this thing works." Jeff said, referring to the box itself.
"Well, just one way to tell." Mary said as she gulped down the content of the vial on her hand.
“Are you crazy?” Jeff shouted. “What if this thing is a poison?”
“Well, I don’t think someone would have that amount of work just to poison us. And I think that I… arrrrrgghhhhh!” Mary shouted as she felt a stinging pain on her rear end.
"What happened?" Jeff asked as Mary was fumbling with her pants buttons. But besides her efforts her pants ripped before she could open them.
“There is something growing on me!” Mary answered him while turning around. She had a black limb growing out her ass and it was still growing.
“What is that?” Jeff asked incredulous.
“That vial worked!” Mary said still surprised. “And I think I am turning into a drider. What is a drider?”
“It is a half spider, half woman creature. Are you sure you are turning into one?”
“If you have some other explanation to this!” She said while pointing at her one foot long new spider abdomen.
At that moment they heard a series od snaps coming from her lower body. In an instant, her legs opened, her feet bended until her heels where inverted and she was standing on her toes and her spine bent upwards while her new abdomen rose and stood parallel to the ground. Her sudden change of position brought her to the ground. Jeff hurried and caught her.
“Wow! You are really turning into a spider!”
“I don’t like spiders! And I am turning into a black widow! I will be dangerous for you!”
“Calm down! The instructions stated that there weren’t be any changes in your mind. Now you have to just relax while finishing your changes.”
“At least I will be able to speak. What would have happened if I drank the tiger vial I was holding before?”
“That would be troublesome!”
Then they saw as her legs lengthened and turned black as her exoskeleton formed. Her feet finish changing into a claw like feet. Her spider abdomen grew to three feet.
“Wow! I changed a lot now! How I will be able to stand on these legs?”
She tried to stand, but failed.
“What is this?” Jeff asked as he saw several bumps at her sides, growing fast.