Chapter Text
The laboratory was perpetually filled with the scent of disinfectant mingled with a cloying, sickly-sweet odor of decay. Nightmare was strapped to a cold metal table, his eight tentacles pinned down individually; golden fluid—manifested negative energy—oozed from the edges of the restraints encircling his limbs. These cuffs were embedded with anti-magic spikes, ensuring that every struggle brought a fresh, sharp sting.
“Your body is particularly active today.” Dream’s voice drifted from behind him, carrying a cheerful lightness that made Nightmare’s stomach turn. “Did you sense I was coming, brother?”
Nightmare gritted his teeth, refusing to respond. He heard the clatter of a metal tray being set down and the crisp, metallic chime of surgical instruments. Then, gloved hands—clad in sterile latex—brushed against his spine, tracing the curve of the bone as they slid slowly downward.
“Do you remember the womb we shared when we were young?” Dream whispered, his fingers coming to rest at the base of Nightmare’s spine. “We were so close back then; your heartbeat was my lullaby.”
“Shut up,” Nightmare hissed.
Dream merely chuckled, his fingers continuing their exploration as they slid over the curve of Nightmare’s hip. Nightmare felt something cold press against him—not a finger, but a metal instrument.
“Do you know why your body rejects all conventional modifications?” Dream continued, his tone holding the detached calm of a researcher. “Because your cells still remember their original form. Subconsciously, they yearn to return to that warm, damp, safe place.”
Nightmare let out a stifled grunt as the metal instrument was inserted into his body. It was no ordinary dilator; he could feel it releasing a chemical agent that relaxed his muscles and rendered his nerve endings hypersensitive.
“But reverse engineering is always difficult.” Dream twisted the instrument in his hand. “Turning a complete individual back into mere organs... requires precise guidance.”
Nightmare felt a spasm deep within his abdomen. It wasn't pain, but a bizarre sense of hollowness, as if his internal organs were shifting to make room for an intrusion. He looked down at his body—something was writhing beneath the skin of his belly, creating grotesque, shifting bulges. "Those parasites have completed the initial modification." Dream’s voice was right against his ear. "They’ve built a perfect incubator in your pelvis. Now, all that’s needed is..."
Dream withdrew the dilator. Nightmare felt a rush of cold air, but it was quickly replaced by something warmer—Dream’s fingers; two, then three, ruthlessly probing the passage that had just been restructured.
"What... are you doing..." Nightmare’s voice was shattered.
"Checking the progress of the work." Dream’s fingers explored the inner walls, pressing against the newly formed sensitive spots. "Ah, found it. The cervix has been perfectly reshaped, though a few details are still missing..."
Nightmare felt a wave of intense shame. His body was betraying him—when Dream’s fingers pressed a specific point, he involuntarily arched his back and let out a whimper that sounded alien even to his own ears.
"See? Your body remembers." Dream’s voice was filled with triumph. "It remembers how to receive, how to gestate."
The fingers were withdrawn. Nightmare gasped, bracing for the next round of torment. But instead of fingers, he faced something far more terrifying: Dream climbed onto the metal table and straddled him, his erect member pressing against the modified opening.
"No..." Nightmare struggled, his tentacles thrashing wildly within the restraints. "Dream, don't... I'm your..."
"Brother?" Dream leaned down, his golden pupils glinting with an inhuman light under the surgical lamps. "No, brother. Soon, you won't be 'brother' anymore. You’ll become a part of me—a bond deeper than blood."
Dream gave him no chance to protest further. With a rough thrust, Nightmare’s scream was stifled in his throat. It wasn't ordinary intercourse—he could feel Dream’s member driving deep, passing through the parasite-remodeled passage to reach the new, unnatural organ that had formed deep within his abdomen.
"Can you feel it?" Dream panted, beginning to move slowly. "I’m inside your womb, brother. I’m in the place we once shared."
Nightmare couldn't answer. His consciousness was being torn apart by a conflicting torrent of pain and pleasure. The parasites responded to Dream’s intrusion by releasing neurotransmitters, forcing Nightmare’s body to accept, accommodate, and even crave the violation. His inner walls contracted involuntarily, suctioning tightly around the phallus that had penetrated so deeply.
“That’s right... just like that...” Dream quickened his pace, one hand pressing against Nightmare’s abdomen to feel the shape of himself deep within. “Your body learns fast.”
Nightmare saw his abdomen distend—each thrust creating a distinct bulge, as if he were truly pregnant, carrying the intrusion of his own brother. The visual impact nearly shattered his mind, yet his body betrayed him even more completely. A wave of unfamiliar pleasure exploded from deep within his belly, spreading through his entire being along the newly rewired neural pathways.
“You’re so hot inside...” Dream’s voice grew hoarse and heavy. “Those little things have adjusted your internal temperature to the perfect incubation level... they’re preparing the way for my seed...”
*Seed.* The word made Nightmare’s eyes widen in terror. He tried to struggle, but Dream pinned his throat with one hand while pressing down on his abdomen with the other, driving every thrust even deeper.
“I’m going to fill you up, Brother.” Dream whispered, his movements turning wild and unbridled. “I’ll drench this newborn womb with my semen. Then the parasites will finish the job—they’ll break down and reassemble your other organs, leaving behind nothing but this perfect vessel for reproduction.”
Nightmare felt an orgasm approaching—not one he desired, but a forced reaction triggered by the parasites and the external stimulation. His tentacles trembled violently, and golden fluid streamed ceaselessly from the corners of his eyes. Dream, it seemed, had been waiting for this very moment.
“Now, Brother.” Dream thrust deep, reaching the newly formed opening of the cervix. “Come with me.”
Dream’s release was violent and prolonged. Nightmare could feel the warm fluid surging into him, filling a space that should never have existed. Even more terrifying, he could sense the parasites rejoicing—they began to work frantically, absorbing the semen and converting it into energy for the transformation. As Dream withdrew, Nightmare saw a mixture of fluids flowing from his body—golden negative-energy fluid and milky-white semen, along with a trace of eerie pink: the parasite's secretions.
But the torment was far from over. Instead of leaving, Dream leaned down to kiss the swelling in Nightmare’s abdomen, which was slowly beginning to subside.
"Phase one is complete," Dream said, his voice terrifyingly gentle. "Now, we enter phase two—the true transformation."
Dream stepped down from the metal platform and walked toward the control panel against the wall. Nightmare heard the whir of machinery starting up, and the platform began to shift shape. A circular opening appeared in the center of the surface, positioned directly beneath Nightmare’s lower body.
"What... are you going to do...?" Nightmare’s voice was barely a whisper.
"Turning you into what you were always meant to be." Dream returned holding a syringe filled with a shimmering purple liquid. "This is the catalyst. It will accelerate the parasite’s work and make your transformation... far more thorough."
The needle pierced the vein in Nightmare’s neck. The moment the fluid was injected, he felt as though his entire body had been set ablaze. His bones groaned; his muscles dissolved and reformed; countless things writhed beneath his skin. Most terrifying of all was his lower body—he could feel sensation fading from his legs as his pelvis reshaped itself, and the passage that had just been violated began to widen, deepen, and specialize.
"Look, it’s begun." Dream stepped back to admire the transformation. "Your legs are being broken down and converted into nutrients to sustain the womb. Your tentacles will remain—they’ll serve as conduits for those nutrients. As for your upper body... it will become a beautiful adornment for this organ."
Nightmare tried to scream, but his vocal cords were being altered, too; the sound that emerged was nothing more than a distorted whimper. He watched as his body below the waist fused together; his skin turned a deep purple, and the surface began to ripple with folds and textures resembling the lining of a womb. His tentacles ceased their struggling and hung limp, their tips beginning to secrete that same pink parasitic fluid. "Perfect." Dream stepped closer and caressed the surface of the newly formed organ. "Even more perfect than I designed. From this day forth, you are no longer Nightmare. You are my 'Primal Womb'—the source that will gestate all darkness and light."
Dream’s hand slid into the still-moist opening, feeling the inner walls twitch.
"I’ll come visit you often, Brother," Dream whispered, his fingers tracing patterns against the inner lining. "I’ll fill you with my seed and mark you with my very existence. Perhaps one day, you’ll give birth to something—a child that truly belongs to both of us."
Nightmare’s consciousness began to blur. The parasite was taking over his nervous system, driving his mind into the depths and leaving behind only the most basic sensory functions. He could feel Dream’s fingers moving inside him, feel the parasites rejoicing, and feel himself fading away—being restructured into an organ, a vessel, a living toy belonging to Dream.
In the final moment, just before his consciousness sank completely into darkness, a terrifying thought flashed through Nightmare’s mind—
Amidst all this torment, his body was actually craving more.
Then, silence fell. Nothing remained but the hum of laboratory equipment and Dream’s satisfied sigh.
"Goodnight, Brother." Dream kissed the lips that no longer responded. "See you tomorrow."
The creature on the metal table—the being that had once been Nightmare—twitched slightly; its inner walls contracted instinctively, as if in response to the kiss.
Dream smiled, turned off the surgical light, and left his new organ in the darkness.
T.B.C.