The book corrupts Zack

"Everything."

The book begun to levitate in the air, moved by a dark ****. His pages begun to move, pushed by an invisible wind which coming from the depths of hell itself. Zach felt a cold shockwave in his spine, while his legs begun to tremble. He had always considered himself to be brave, but that confrontation with those dark forces was testing his courage.

"You stole me from my legitimate owner... Now you have to pay"

"How?"

A maniacal laugh came out of the pages, and the voice became more warm and sensual.

"I am the book of lust. The carnal grimoire. You will serve me. Become my instrument"

Zach felt his erection grow, almost tearing apart his pants. His tank top which he wore to bed left his arm exposed, and a layer of sweat was clearly visible on his skin. He started to connect the pieces of the puzzle: the girl was truly Becky, as she claimed. The book had simply changed her. Fear begun leaving his face, replaced by a twisted smile.

"Yeah, she was Becky. If I had done this to her, just imagine what I could do to you"

Images begun flashing in Zack's eyes, images of sex, demons, of the depths of hell. His friends would worship him as a god, a terrible god of sex. And Becky... She would be his.

"I'm ready."

"So decisive... So prone to corruption... I've met very few people like you who quickly accepted my dark embrace, and all of them did great things in my name."

Zack stepped towards the book, now eager to experiment with it. His eyes glowed of an unnatural purple light, and all his muscles were tense, in preparation for the coming ritual.

"Enough with this words. Book, show me what you can do"

"Touch me"

Zack finally put his hand on the book. He was still a little scared, but as soon as he touched the pages, images of his potential future begun overflowing his mind. He was fucking Becky in the ass, surrounded by a harem of beautiful women, all eager of enjoying their time with him. He saw himself turned into a mighty demon flying across the night sky, his eyes bloody rubies capable of shining like small stars. He gazed at a golden throne where he would sit on, and still many other vision appeared in his mind. The dark energy begun flowing inside him, he could feel it enter every cell of his body, becoming part of his bloodstream, changing his very nature. And most important of all, this felt natural to him, no longer he was fearful of that book, because he knew the marvels it could do. The light in the room turned off magically, as the book begun to glow, engulfed in a red aura. Zack felt something entering his fingertips, like a small sting penetrating inside his body. He didn't resist it, he welcomed it with pleasure and soft moans instead. The red light engulfed his body too now, and he could feel the changes beginning to take place. His veins on his arms had begun to become thicker, coming out from under the skin. They seemed to glow of a dim light, like if his own blood has been contaminated by the book's hellish light. Zack was becoming worried, anxious to embrace a new perfect body.

"How long does it take?"

The book didn't answer, but there was no need for if. His left arm, the one touching the book, immediately begun to change. His muscles were growing rapidly, as his veins pumped the dark energy into his body. He felt his own arm burning, like if somebody had thrown it into the fire. He opened his mouth, trying to scream, but then something cane out from the book pages: it was a dark tentacle, almost invisible in the dark room. Terror once more grew inside Zack, as he tried to run away from that thing, but it was too late: his hand couldn't lift from the book, as if it was stuck with glue. The tentacle then twisted in the air, in some kind of a hellish and quick dance. Before he was able to scream, the thing entered his mouth, filling it completely with its slimy mass. Immediately after, the tentacle begun pumping a bitter fluid inside his throat, something hot and dense, something which could not be compared to anything in this world. He tried to pull away, but his hand was still firmly stick to the book, and the sheer pain caused by the tentacle now reaching deep inside his throat almost suppressed his thoughts, overwhelming him with a strange mixture of pleasure and pain. He could feel the dark substance entering his stomach, expanding into his body, changing it from the inside. In the meantime his arm now has finished to grow, turned into a refined and perfect set of muscles. Now the veins on his chest too had grown, and they were pushing his abs to grow at an incredibly fast rate. A six pack set appeared under his thin top, and has his muscles grow the cloth became more and more tense, unable to contain his perfect body. But the biggest change was yet to come: his dick begun to grow, pushing against his pants with unbelievable ****, and quickly ripping them apart. His beast was now free in all its glory, with black veins exalting Zack's new impressive... measures.

"Now my child, it's time to fix your style too... Don't you think?"

Zack wasn't able to speak, as a black mist came out from the book and quickly engulfed all of his body, covering his eyes and making him unable to see. However he didn't need to see to know what was happening to his body, in his mind a picture of his body in all its magnificent perfection appeared, further enhancing his sexual desire. He felt his skin burning on his chest, until a strange tatoo materialised on his body: a twisting red snake, wrapped around his bellybutton, with a long tongue stretching down to his pubic hair.

"Don't worry, we're almost done"

He felt the tentacle pushing something inside his stomach. It wasn't actually more fluid, it felt like something hard, and smooth. He felt that thing rolling inside him, gently touching his inside parts, until it finally stopped, stuck somewhere deep under his skin.

"I tried the same with Becky, but her friends didn't let me finish... You have been a good friend to me, and I'll reward you as such, Zack"

He was full of adrenaline, unable to think about anything but sex and lust. He sensed the tentacle retreating from his body, its job now finally completed. He could feel his body continuing to change as that thing came out from him, coming back to the depths of hell. His hands burned like hit pieces of coal, almost glowing in the darkness of the mist. He could see two red pentagrams forming on his palms, arcane tattoos similar to the previous one. The tentacle finally left his body, and he immediately felt empty, shattered, weakened. He wanted that energy. No, he needed it. He tried to breathe, as a terrible headache had hit his mind, but the only thing entering his nose was the black mist, which smelled of cinder and the dying fireplaces of bleak winters. He could feel clothes on his body changing, adapting to the transformation. His tank top which he always wore to bed was shrinking, becoming almost like a second skin covering all his torso. It changed colour, becoming pitch black and it looked like made of some elastic cloth. His perfect muscles were clearly visible under it, as the new tank top seemed directly shaped on his body. His pants too where becoming something different: they stretched and transformed, becoming a pair of leather black trouser, which didn't even try to hide his pack.

"I am perfect"