A change in style

She opened the book at a random page. A series of unreadable runes were written on the paper, composing some kind of ancient magic formula.

"What's this?"

"The second part of your journey with me. When you have sex, you start accumulating energy, energy which you can use for spells like this. This will bring you closer to me... And make you better."

Closer to what exactly? The image of the tentacle coming from the portal was still too vivid in her mind, and the old Becky was struggling to adapt to her new life. Just a week before she didn't believe in magic, nor demons, nor in supernatural forces. And now she was, listening to an old magic book promising to transform her in some wicked creature of evil.

"Doesn't it feel good, though?"

Heck she knew it felt good. She put a hand between her legs, and she wasn't surprised to find it wet with moist and fluids. She could feel every single centimetre of her skin wishing for pleasure, her nipples hard rock against the crude fabric of her shirt.

"Yeah, it really feels good. Let's do this."

"Just put your hand on the page. Don't worry, it won't hurt this time."

She did it instinctively, like if she was moved by an invisible ****. She thought for a moment of Luke, her former friends and her life before all of that. The regret was destroying her, and she couldn't bear it anymore. All she wanted was to see it all washed away, forgotten, once and for all.

"I'll take care of this regret. It's not your fault, my darling... You will feel better soon, trust me"

After that, it came. It was unlike she had ever felt before, a flux of pure energy entering her body, incredibly powerful. Her hand wasn't able to contain the flow coming from the book, so it begun to shake. A dark aura was spreading from the page, slowly caressing the girl's skin, gently. It was a purple mist, dense with the same delicious smell of hot cum.

"Oh God..."

As the mist touched her nails, they became pitch black and started to grow at least a centemetre. As the mist continue to spread, it quickly eroded her shirt, exposing her bare skin to the cold air. However Backy didn't sense the cold temperature, as her skin was burning like hot coal. It looked paler, of an almost unnatural white, shining like the night moon. Her shirt soon had almost been entirely destroyed, turned into a short top which barely covered her breasts. Speaking of them, her already impressive boobs had gone from an E to an F size, also becoming far harder and fitter. She barely felt their weight, as they begun to rise like she was using a push-up bra. Her butt had also slightly increased in size, and it too had become hard and strong.

In the mean time her clothes had finished transforming too: her shirt had become a thin sexy red top, which made no effort in hiding her erect nipples and also made her areolas almost visible. Her jeans were now painted on her body, transformed in a pair of shorts that left the lover part of her butt exposed. Her shoes had turned into a pair of leather pitch black boots, with short heels which made her look taller.

"Oh God, what is happening?"

"The bast has yet to come, darling..."

It was then that the black mist which had come from the book became far denser and took the shape of a tentacle; Becky new what was going to happen, and started to tremble in fear. The gas tentacle quickly moved in the air, and before Backy was able to react, it entered her mouth, filling her lungs with the black mist.

-Aaarrggh! -

She felt completely overwhelmed with the dark substance; in a moment, all her taught s disappeared, reducing her mind to a blank slate. Luke, Mark, everything was gone. Then she begun to feel the substance spreading across the body, corrupting every cell and every organ, enhancing her. It was amazing. Her lips had blackened like her nails before, and she felt her nipples grow and become dark too. Deep inside her, her blood too had also become black, as her very soul was corrupted.

When she opened her eyes, revealing two hot red burning pieces of coal, she knew her destiny had forever changed.