The demon bent down and kissed him, sliding a forked tongue between Marcus’ lips, and he couldn’t help himself–he allowed the demon to invade him, closing the gap between them, allowing the demon to wrap its arms around him, pull him into its heat. Something…in him had changed. Something else. There was a fire inside him, a deep, aching desire for…for more. The demon toyed with him for a few minutes, teasing him with how sensitive his flesh had become, and then pushed Marcus to the wall, ass out, got down behind him, and began licking at his hole. The tongue…wormed into him, opening him up in ways Marcus had never experienced, sending his mind slowly giving way to pleasure and lust. “F-Fuck me,” he moaned, “Fuck me–change me. Give me what I want, demon.”
“As you desire, mortal,” the demon said, and stood back up, gripping Marcus’ hips with both hands, his nails digging into his skin, and he pushed the head of his cock against the mage’s hole.
This, he expected to hurt. But it did not. The cock slid right into him, like it belonged there, with such sublime pleasure that Marcus’ own cock began to spill its own stream of cum. He looked down, and saw his own cock was throbbing, and growing–and the cum…it was so bright, and white. It almost sparkled in the light of the candles around the room. The demon reached around and pumped Marcus cock, pulling him tighter, its cock sliding in deeper still. He could sense that…something was wrong, that something in him, was wrong, but everything felt so…good, that he couldn’t begin to separate anything out.
“That’s a good mage. Spill that seed, empty yourself out all over the floor. For every drop you spill, I will fill you up with twice as much–and mine is much, much more potent.”
The pain was returning, and this time was even more intense. Something else had happened to him though–he wasn’t afraid of it anymore–he was almost craving it. Every pulse of his muscles, every new layer of bone, every stretched tendon and frayed ligament. It hurt, yes, but suddenly his body received that as a deep, overwhelming pleasure. The demon’s thrusts were still fluid and smooth, sliding in and out of him like it belonged there, one hand still milking his own cock, spilling it’s beautiful seed out in a steady stream, and that fire inside him, that lust, it was growing hotter. He didn’t know how to describe it, either–it didn’t seem to have a point where it resided, beyond somewhere in his chest, like the demon had planted a red hot coal right between his lungs, or behind his heart, or down in his stomach. All he knew for certain was that it was growing more and more intense, overshadowing the pain in his muscles and bones now. “I…no, this…this isn’t right…” he moaned, and tried to gett his body to push back from the wall and get away, but all he could succeed at doing was pushing his ass back into the demon’s thrusts, feeling his own cock leaking faster.
“This is what you wanted mage, now cum. Release it all from yourself, and everything you ever wanted will come true, I swear it.”
The demon had him. Marcus didn’t know when it had happened. Perhaps it had been this entire time, the beast stringing him along, making him think he was in control. The demon was stroking faster now, and Marcus could feel his balls contracting, pumping, and he exploded with a scream. The orgasm held no pleasure for him, just a deep, soul crushing pain and terror he had never experienced before in his life. Ropes and ropes of white cum shot from the head of his cock, and with each load, he felt emptier, and weaker, and filthier, and hornier, until it finally ceased. The demon slid free, and Marcus collapsed in the midst of his own cum, his body shaking. The fire wasn’t gone. It was raging. It was burning up inside of him like an inferno, and he rolled over and stared at the demon.
“Rageroth, I banish you,” he spat–but nothing happened. The demon just stood there, inspecting the nails of one hand, and then looked down at the mage lying on the floor before it’s feet.
“My my, it seems the little mage has…lost all his mojo.”
Marcus’ eyes went wide, and he turned to the puddle of his own cum, evaporating into the air, and crawled to it, scooping some up with his fingers, but when he touched it to his tongue he let out a howl of pain, and spit it out across the wall, along with dark, bloody bile from his throat.
“Not just your mojo, of course. Your innocence. Your soul. Nothing vital, of course, nothing I can’t replace,” the demon walked over to him, “Do you feel it? The corruption inside you? It’s so very, very hungry. It’ll consume you before too much longer, leave you as pile of ash in here for some mortal to discover. Of course, I could help you–but why would I want to? You tore me from my home. Your hubris is disgusting to me, begging me to use my power to make you into a man. Well you got what you wished for–for a few hours at least.”
Marcus watched the last of his cum evaporate from the floor. He could feel it now–his magic, it was gone. The incubus had literally fucked it all out of him. Knowing the demon’s name meant nothing if he had no power to use against him–and soon, he wouldn’t have anything at all. Looking down at himself, he saw that the demon was right–he had the body of his dreams, not that it would matter much, soon enough. It was…hard to breathe, like the air in his lungs was beginning to smolder. He coughed, a bit of smoke emerged from his throat.
“You’re lucky, really,” the demon said, “While others would have found your hubris insulting, I find it…rather charming. Perhaps I should keep you as a pet–after all, you did enjoy my cock so much, and that hole of yours…while not perfect, it was really rather lovely.” Marcus tried to stand up, but the demon shoved him back down onto his knees, his massive cock inches from his face yet again. He…wanted it. He knew it would bring him no salvation, but he wanted it all the same. “So let’s make another deal, mortal. Become my sex slave, for all eternity, and I’ll spare you what I promise to be a very, horrific death. And after death as well, I should mention, since your soul is claimed by me. Perhaps, once your dead, I’ll banish you to where you were planning to send me?”
“Please…please no, I beg of you, I’ll…I’ll serve you, I’ll be your slave. Do what you want with me, I won’t fight,” Marcus said.
He looked up at the demon, who was looking down at him with a smile. “But why, little mortal? Aren’t you afraid of what I might do to you?”
Marcus shook his head, “No–No, I…I want it. I need you inside me, I can’t bear being empty anymore, please, please fill me with your cock, and your seed, twist me as you want, but I…I’m so…horny…”